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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549



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FORM 10-Q



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(Mark One)

|x | Quarterly report pursuant to Section 13 or 15(d) of the Securities and Exchange Act of 1934
|- | -------------------------------------------------------------------------------------------

For the Quarterly Period Ended June 30, 2006

OR



| ̈ | Transition report pursuant to Section 13 or 15(d) of the Securities and Exchange Act of 1934
|- | --------------------------------------------------------------------------------------------

For the Transition Period from              to

Commission File Number 000-50461



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TERCICA, INC.

(Exact name of Registrant as specified in its charter)



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|                                                               |  |                                        
|-------------------------------------------------------------- |  | ---------------------------------------
|Delaware                                                       |  | 26-0042539                             
|(State or other jurisdiction of incorporation or organization) |  | (I.R.S. Employer Identification Number)

2000 Sierra Point Parkway, Suite 400

Brisbane, San Francisco, CA 94005

(650) 624-4900

(Address, including zip code, and telephone number, including area code, of registrants principal executive offices)



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Indicate by check mark whether the
registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and
(2) has been subject to such filing requirements for the past 90 days.    Yes  x    No ̈

Indicate by check mark whether the registrant is a large accelerated
filer, an accelerated filer, or a non-accelerated filer. (Check one):

Large accelerated filer ̈Accelerated filer  x    Non-accelerated filer ̈

Indicate by check mark whether the
registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes ̈No  x

As of July 31, 2006, there were 37,581,734 shares
of the Registrants Common Stock outstanding.



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##### Table of Contents

TERCICA, INC.

FORM 10-Q FOR THE QUARTER ENDED JUNE 30, 2006

INDEX



|                                                                                                                                                              |  |                                                                                       |  |     
|------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | ------------------------------------------------------------------------------------- |  | ----
|                                                                                                                                                              |  |                                                                                       |  | Page
|PART I  FINANCIAL INFORMATION                                                                                                                                |  |                                                                                      
|                                                                                                                                                              |  |                                                                                      
|ITEM 1.                                                                                                                                                       |  | FINANCIAL STATEMENTS (Unaudited)                                                      |  |     
|                                                                                                                                                              | 
|Condensed Balance Sheets  June 30, 2006 and December 31, 2005                                                                                                |  | 3                                                                                    
|                                                                                                                                                              | 
|Condensed Statements of Operations  Three and six months ended June 30, 2006 and 2005, and the period from October 1, 2000 (inception) through June 30, 2006 |  | 4                                                                                    
|                                                                                                                                                              | 
|Condensed Statements of Cash Flows  Six months ended June 30, 2006 and 2005, and the period from October 1, 2000 (inception) through June 30, 2006           |  | 5                                                                                    
|                                                                                                                                                              | 
|Notes to the Condensed Financial Statements                                                                                                                   |  | 6                                                                                    
|                                                                                                                                                              |  |                                                                                      
|ITEM 2.                                                                                                                                                       |  | MANAGEMENTS DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS |  | 19  
|                                                                                                                                                              |  |                                                                                      
|ITEM 3.                                                                                                                                                       |  | QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK                            |  | 29  
|                                                                                                                                                              |  |                                                                                      
|ITEM 4.                                                                                                                                                       |  | CONTROLS AND PROCEDURES                                                               |  | 29  
|                                                                                                                                                              | 
|PART II  OTHER INFORMATION                                                                                                                                   |  |                                                                                      
|                                                                                                                                                              |  |                                                                                      
|ITEM 1.                                                                                                                                                       |  | LEGAL PROCEEDINGS                                                                     |  | 30  
|                                                                                                                                                              |  |                                                                                      
|ITEM 1A.                                                                                                                                                      |  | RISK FACTORS                                                                          |  | 32  
|                                                                                                                                                              |  |                                                                                      
|ITEM 2.                                                                                                                                                       |  | UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS                           |  | 49  
|                                                                                                                                                              |  |                                                                                      
|ITEM 4.                                                                                                                                                       |  | SUBMISSIONS OF MATTERS TO A VOTE OF SECURITY HOLDERS                                  |  | 49  
|                                                                                                                                                              |  |                                                                                      
|ITEM 6.                                                                                                                                                       |  | EXHIBITS                                                                              |  | 50  
|                                                                                                                                                              | 
|Signatures                                                                                                                                                    |  | 51                                                                                   



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##### Table of Contents

PART I  FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS.

TERCICA, INC.

(A DEVELOPMENT STAGE COMPANY)

CONDENSED BALANCE SHEETS

(In thousands)

(Unaudited)



|                                                 |  |              |          |   |                  |   |          |  
|------------------------------------------------ |  | ------------ | -------- | - | ---------------- | - | -------- | -
|                                                 |  | June 30,2006 |          |   | December 31,2005 |  
|Assets                                           |  |              |          |   |                  |   |          |  
|Current assets:                                  |  |              |          |   |                  |   |          |  
|Cash and cash equivalents                        |  | $            | 20,775   |   |                  | $ | 14,817   |  
|Short-term investments                           |  |              | 45,306   |   |                  |   | 43,809   |  
|Accounts receivable                              |  |              | 102      |   |                  |   |         |  
|Inventories, net                                 |  |              | 1,890    |   |                  |   | 1,636    |  
|Prepaid expenses and other current assets        |  |              | 2,236    |   |                  |   | 1,673    |  
|                                                 |  |              |          |   |                  |   |          |  
|Total current assets                             |  |              | 70,309   |   |                  |   | 61,935   |  
|Property and equipment, net                      |  |              | 4,230    |   |                  |   | 4,021    |  
|Restricted cash                                  |  |              | 340      |   |                  |   | 340      |  
|Other assets                                     |  |              | 20       |   |                  |   | 20       |  
|                                                 |  |              |          |   |                  |   |          |  
|Total assets                                     |  | $            | 74,899   |   |                  | $ | 66,316   |  
|                                                 |  |              |          |   |                  |   |          |  
|Liabilities and stockholders equity             |  |              |          |   |                  |   |          |  
|Current liabilities:                             |  |              |          |   |                  |   |          |  
|Accounts payable                                 |  | $            | 2,901    |   |                  | $ | 2,245    |  
|Accrued expenses                                 |  |              | 5,130    |   |                  |   | 5,750    |  
|Liability for early exercise of stock options    |  |              | 58       |   |                  |   | 70       |  
|                                                 |  |              |          |   |                  |   |          |  
|Total current liabilities                        |  |              | 8,089    |   |                  |   | 8,065    |  
|Deferred rent                                    |  |              | 1,623    |   |                  |   | 1,429    |  
|Other liabilities                                |  |              | 9        |   |                  |   | 24       |  
|                                                 |  |              |          |   |                  |   |          |  
|Total liabilities                                |  |              | 9,721    |   |                  |   | 9,518    |  
|                                                 |  |             
|Commitments and contingencies                    |  |              |          |   |                  |   |          |  
|                                                 |  |             
|Stockholders equity:                            |  |              |          |   |                  |   |          |  
|Common stock                                     |  |              | 38       |   |                  |   | 32       |  
|Additional paid-in capital                       |  |              | 259,849  |   |                  |   | 225,100  |  
|Deferred stock compensation                      |  |              |         |   |                  |   | (2,591   | )
|Accumulated other comprehensive loss             |  |              | (15      | ) |                  |   | (2       | )
|Deficit accumulated during the development stage |  |              | (194,694 | ) |                  |   | (165,741 | )
|                                                 |  |              |          |   |                  |   |          |  
|Total stockholders equity                       |  |              | 65,178   |   |                  |   | 56,798   |  
|                                                 |  |              |          |   |                  |   |          |  
|Total liabilities and stockholders equity       |  | $            | 74,899   |   |                  | $ | 66,316   |  
|                                                 |  |              |          |   |                  |   |          |  

See accompanying notes.



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TERCICA, INC.

(A DEVELOPMENT STAGE COMPANY)

CONDENSED STATEMENTS OF OPERATIONS

(In thousands, except per share data)

(Unaudited)



|                                                                                             |  |                            |         |   |                           |   |         |                                                            |  |   |         |   |  |   |         |   |  |   |          |  
|-------------------------------------------------------------------------------------------- |  | -------------------------- | ------- | - | ------------------------- | - | ------- | ---------------------------------------------------------- |  | - | ------- | - |  | - | ------- | - |  | - | -------- | -
|                                                                                             |  | Three Months EndedJune 30, |         |   | Six Months Ended June 30, |   |         | Period fromOctober 1, 2000(inception)through June 30, 2006 | 
|                                                                                             |  | 2006                       |         |   | 2005                      |   |         | 2006                                                       |  |   | 2005    |   | 
|Net product sales                                                                            |  | $                          | 166     |   |                           | $ |        |                                                            |  | $ | 251     |   |  | $ |        |   |  | $ | 251      |  
|                                                                                             |  |                            |         |   |                          
|Costs and expenses:                                                                          |  |                            |         |   |                           |   |         |                                                            |  |   |         |   |  |   |         |   |  |   |          |  
|Cost of product sales                                                                        |  |                            | 557     |   |                           |   |        |                                                            |  |   | 640     |   |  |   |        |   |  |   | 640      |  
|Research and development*                                                                    |  |                            | 4,596   |   |                           |   | 6,320   |                                                            |  |   | 9,226   |   |  |   | 11,190  |   |  |   | 80,438   |  
|Selling, general and administrative*                                                         |  |                            | 10,586  |   |                           |   | 6,458   |                                                            |  |   | 21,090  |   |  |   | 10,638  |   |  |   | 66,993   |  
|Acquired in-process research and development                                                 |  |                            |        |   |                           |   |        |                                                            |  |   |        |   |  |   |        |   |  |   | 8,158    |  
|                                                                                             |  |                            |         |   |                           |   |         |                                                            |  |   |         |   |  |   |         |   |  |   |          |  
|Total costs and expenses                                                                     |  |                            | (15,739 | ) |                           |   | (12,778 | )                                                          |  |   | (30,956 | ) |  |   | (21,828 | ) |  |   | (156,229 | )
|                                                                                             |  |                            |         |   |                           |   |         |                                                            |  |   |         |   |  |   |         |   |  |   |          |  
|Operating loss                                                                               |  |                            | (15,573 | ) |                           |   | (12,778 | )                                                          |  |   | (30,705 | ) |  |   | (21,828 | ) |  |   | (155,978 | )
|                                                                                             |  |                            |         |   |                          
|Interest expense                                                                             |  |                            |        |   |                           |   | (294    | )                                                          |  |   |        |   |  |   | (793    | ) |  |   | (1,186   | )
|Interest and other income, net                                                               |  |                            | 889     |   |                           |   | 671     |                                                            |  |   | 1,752   |   |  |   | 1,112   |   |  |   | 5,498    |  
|                                                                                             |  |                            |         |   |                           |   |         |                                                            |  |   |         |   |  |   |         |   |  |   |          |  
|Net loss                                                                                     |  |                            | (14,684 | ) |                           |   | (12,401 | )                                                          |  |   | (28,953 | ) |  |   | (21,509 | ) |  |   | (151,666 | )
|Deemed dividend related to beneficial conversion feature of convertible preferred stock      |  |                            |        |   |                           |   |        |                                                            |  |   |        |   |  |   |        |   |  |   | (44,153  | )
|                                                                                             |  |                            |         |   |                           |   |         |                                                            |  |   |         |   |  |   |         |   |  |   |          |  
|Net loss allocable to common stockholders                                                    |  | $                          | (14,684 | ) |                           | $ | (12,401 | )                                                          |  | $ | (28,953 | ) |  | $ | (21,509 | ) |  | $ | (195,819 | )
|                                                                                             |  |                            |         |   |                           |   |         |                                                            |  |   |         |   |  |   |         |   |  |   |          |  
|Basic and diluted net loss per share allocable to common stockholders                        |  | $                          | (0.39   | ) |                           | $ | (0.40   | )                                                          |  | $ | (0.79   | ) |  | $ | (0.72   | ) |  |   |          |  
|                                                                                             |  |                            |         |   |                           |   |         |                                                            |  |   |         |   |  |   |         |   |  |   |          |  
|Shares used to compute basic and diluted net loss per share allocable to common stockholders |  |                            | 37,508  |   |                           |   | 31,257  |                                                            |  |   | 36,579  |   |  |   | 29,702  |   |  |   |          |  
|                                                                                             |  |                            |         |   |                           |   |         |                                                            |  |   |         |   |  |   |         |   |  |   |          |  
|________                                                                                     |  |                            |         |   |                           |   |         |                                                            |  |   |         |   |  |   |         |   |  |   |          |  
|                                                                                            
|*  Includes non-cash stock-based compensation expense as follows:                            | 
|                                                                                             |  |                            |         |   |                          
|Research and development                                                                     |  | $                          | 548     |   |                           | $ | 306     |                                                            |  | $ | 977     |   |  | $ | 627     |   |  | $ | 4,346    |  
|Selling, general and administrative                                                          |  |                            | 1,099   |   |                           |   | 302     |                                                            |  |   | 1,787   |   |  |   | 628     |   |  |   | 4,506    |  
|                                                                                             |  |                            |         |   |                           |   |         |                                                            |  |   |         |   |  |   |         |   |  |   |          |  
|Total                                                                                        |  | $                          | 1,647   |   |                           | $ | 608     |                                                            |  | $ | 2,764   |   |  | $ | 1,255   |   |  | $ | 8,852    |  
|                                                                                             |  |                            |         |   |                           |   |         |                                                            |  |   |         |   |  |   |         |   |  |   |          |  

See accompanying notes.



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TERCICA, INC.

(A DEVELOPMENT STAGE COMPANY)

CONDENSED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)



|                                                                                                                                         |  |                           |         |   |                                                            |   |         |   |  |   |          |  
|---------------------------------------------------------------------------------------------------------------------------------------- |  | ------------------------- | ------- | - | ---------------------------------------------------------- | - | ------- | - |  | - | -------- | -
|                                                                                                                                         |  | Six Months Ended June 30, |         |   | Period fromOctober 1, 2000(inception)through June 30, 2006 |  
|                                                                                                                                         |  | 2006                      |         |   | 2005                                                       |   |        
|Cash flows from operating activities:                                                                                                    |  |                           |         |   |                                                            |   |         |   |  |   |          |  
|Net cash used in operating activities                                                                                                    |  | $                         | (26,523 | ) |                                                            | $ | (18,829 | ) |  | $ | (130,425 | )
|                                                                                                                                         |  |                           |         |   |                                                            |   |         |   |  |   |          |  
|Cash flows from investing activities:                                                                                                    |  |                           |         |   |                                                            |   |         |   |  |   |          |  
|Purchases of property and equipment                                                                                                      |  |                           | (745    | ) |                                                            |   | (1,435  | ) |  |   | (6,423   | )
|Proceeds from sale of equipment                                                                                                          |  |                           |        |   |                                                            |   |        |   |  |   | 300      |  
|Purchases of available-for-sale securities                                                                                               |  |                           | (32,050 | ) |                                                            |   | (69,159 | ) |  |   | (319,528 | )
|Proceeds from sales and maturities of available-for-sale securities                                                                      |  |                           | 30,782  |   |                                                            |   | 53,750  |   |  |   | 274,222  |  
|                                                                                                                                         |  |                           |         |   |                                                            |   |         |   |  |   |          |  
|Net cash used in investing activities                                                                                                    |  |                           | (2,013  | ) |                                                            |   | (16,844 | ) |  |   | (51,429  | )
|                                                                                                                                         |  |                           |         |   |                                                            |   |         |   |  |   |          |  
|Cash flows from financing activities:                                                                                                    |  |                           |         |   |                                                            |   |         |   |  |   |          |  
|Net proceeds from issuance of preferred stock                                                                                            |  |                           |        |   |                                                            |   |        |   |  |   | 63,960   |  
|Net proceeds from issuance of common stock                                                                                               |  |                           | 34,494  |   |                                                            |   | 51,351  |   |  |   | 137,250  |  
|Other, net                                                                                                                               |  |                           |        |   |                                                            |   | (76     | ) |  |   | 1,419    |  
|                                                                                                                                         |  |                           |         |   |                                                            |   |         |   |  |   |          |  
|Net cash provided by financing activities                                                                                                |  |                           | 34,494  |   |                                                            |   | 51,275  |   |  |   | 202,629  |  
|                                                                                                                                         |  |                           |         |   |                                                            |   |         |   |  |   |          |  
|Net increase in cash and cash equivalents                                                                                                |  |                           | 5,958   |   |                                                            |   | 15,602  |   |  |   | 20,775   |  
|Cash and cash equivalents, beginning of period                                                                                           |  |                           | 14,817  |   |                                                            |   | 14,126  |   |  |   |         |  
|                                                                                                                                         |  |                           |         |   |                                                            |   |         |   |  |   |          |  
|Cash and cash equivalents, end of period                                                                                                 |  | $                         | 20,775  |   |                                                            | $ | 29,728  |   |  | $ | 20,775   |  
|                                                                                                                                         |  |                           |         |   |                                                            |   |         |   |  |   |          |  
|Supplemental schedule of noncash activities:                                                                                             |  |                           |         |   |                                                            |   |         |   |  |   |          |  
|Issuance of Series A convertible preferred stock to a collaboration partner in exchange for acquired in-process research and
development |  | $                         |        |   |                                                            | $ |        |   |  | $ | 4,071    |  
|Reversal of deferred stock compensation upon adoption of SFAS No. 123R                                                                   |  | $                         | (2,591  | ) |                                                            | $ |        |   |  | $ | (2,591   | )
|Deferred stock compensation, net of forfeitures                                                                                          |  | $                         |        |   |                                                            | $ | (1,111  | ) |  | $ | 8,331    |  
|Deemed dividend related to beneficial conversion feature of convertible preferred stock                                                  |  | $                         |        |   |                                                            | $ |        |   |  | $ | 44,153   |  
|Conversion of Series A and B convertible preferred stock into common stock                                                               |  | $                         |        |   |                                                            | $ |        |   |  | $ | 68,637   |  
|Issuance of common stock for senior credit facility                                                                                      |  | $                         |        |   |                                                            | $ | 1,002   |   |  | $ | 1,001    |  
|Issuance of warrant in connection with committed equity financing facility                                                               |  | $                         |        |   |                                                            | $ |        |   |  | $ | 1,196    |  
|Other, net                                                                                                                               |  | $                         | 62      |   |                                                            | $ | 89      |   |  | $ | 1,253    |  

See accompanying notes.



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##### Table of Contents

TERCICA, INC.

(A DEVELOPMENT STAGE COMPANY)

NOTES TO THE CONDENSED FINANCIAL STATEMENTS

(Unaudited)

1. Company and Summary of Significant Accounting Policies

Organization and Business

Tercica, Inc. (the Company) is a biopharmaceutical company focused on the development
and commercialization of new therapeutics for the treatment of short stature and other endocrine disorders. The Companys predecessor, Tercica Limited, a New Zealand Company, was formed in October 2000. Tercica Medica, Inc. was incorporated in
Delaware in December 2001, adopted the calendar year as its fiscal year and subsequently changed its name in September 2003 to Tercica, Inc. In early 2002, the Company acquired (at amounts approximating Tercica Limiteds historical net book
value) an immaterial amount of assets, including intellectual property rights, from Tercica Limited as its operations were moved from New Zealand to California. In March 2002, Tercica Limited made a final, immaterial distribution to its stockholders
in connection with its legal liquidation. In April 2002, the Company licensed the rights of Genentech to develop, manufacture and commercialize rhIGF-1 products for a broad range of indications in the United States, including short stature and
diabetes, but excluding diseases and conditions of the central nervous system. In July 2003, the Company signed an international license and collaboration agreement with Genentech obtaining the rights to develop and commercialize rhIGF-1 products
outside of the United States for all indications other than diseases and conditions of the central nervous system. The international license and collaboration agreement provides that the Company must enter into a written agreement with another
company if it desires to commercialize Increlex
for the treatment of diabetes outside of the United States.

The Companys first commercial product is Increlex, a DNA-derived recombinant human insulin-like growth
factor-1 (rhIGF-1). In August 2005, the U.S. Food and Drug Administration (FDA) approved the use and marketing of long-term Increlex replacement therapy for the treatment of children with severe primary insulin-like
growth factor deficiency, (severe Primary IGFD) or with growth hormone gene deletion who have developed neutralizing antibodies to growth hormone, and granted to Increlex seven years of orphan drug marketing exclusivity for those
two indications. See the section entitled Risks Related to Our Business under Part II, Item 1A below for further details related to the Companys orphan drug marketing exclusivity. In January 2006, the Company launched
Increlex in the United States. In December 2005,
the Company also submitted a Marketing Authorization Application (MAA) in the European Union for the long-term treatment of growth failure in children with severe Primary IGFD or with growth hormone gene deletion who have developed
neutralizing antibodies to growth hormone. The Companys current focus is on marketing and selling Increlex for the treatment of severe Primary IGFD and developing Increlex as a replacement therapy for primary IGF-1 deficiency, or Primary IGFD. The Company defines the indication Primary IGFD to mean a child who has both a
height standard deviation score (Height SDS) and an IGF-1 standard deviation score (IGF-1 SDS) of less than minus two, and the indication severe Primary IGFD to mean a child who has both a Height SDS and IGF-1 SDS of minus
three or less, in each case in the presence of normal or elevated levels of growth hormone. The Company is currently conducting two late-stage clinical trials for the use of rhIGF-1 in Primary IGFD.

These development stage financial statements and accompanying notes include the results of operations from the inception of Tercica Limited in October
2000 as both the Company and Tercica Limited were under common control as evidenced by the following factors: (i) all of the investors of Tercica Limited were founding stockholders of the Company, (ii) substantially all of the employees of
Tercica Limited became employees of the Company, (iii) the nearly identical business plans were adopted by both entities and (iv) the commencement of negotiations to obtain the license for recombinant human insulin-like growth factor-1
( rhIGF-1) from Genentech, Inc. were commenced by Tercica Limited, and completed by the Company.

The Company is in its initial
stage of commercialization and is considered to be a development stage company, as its primary activities since incorporation have been establishing its facilities, recruiting personnel, conducting research and development, business development,
business and financial planning and raising capital.



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##### Table of Contents

TERCICA, INC.

(A DEVELOPMENT STAGE COMPANY)

NOTES TO THE CONDENSED FINANCIAL STATEMENTS (continued)

(Unaudited)



Basis of Presentation

The accompanying unaudited
condensed financial statements have been prepared in accordance with the requirements of the U.S. Securities and Exchange Commission (SEC) for interim reporting. As permitted under those rules, certain footnotes or other financial
information that are normally required by U.S. generally accepted accounting principles (GAAP) can be condensed or omitted. In the opinion of management, the financial statements include all normal and recurring adjustments that are
considered necessary for the fair presentation of the Companys financial position and operating results.

The results of the
Companys operations can vary during each quarter of the year. Therefore, the results and trends in these interim financial statements may not be the same as those for the full year. The information included in this Quarterly Report on Form
10-Q should be read in conjunction with the audited financial statements for the year ended December 31, 2005, included in the Companys Annual Report on Form 10-K for the year ended December 31, 2005, filed with the Securities and
Exchange Commission on March 16, 2006, as amended.

The condensed balance sheet at December 31, 2005 that is shown in this
Quarterly Report, has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by GAAP for complete financial statements.

Follow-on Public Offering

On September 9, 2005,
the Company filed a shelf registration statement with the SEC pursuant to which the Company may, from time to time, offer and sell shares of the Companys common stock and preferred stock, various series of debt securities and/or warrants to
purchase any of such securities, either individually or in units, in one or more offerings, with a total value of up to $75,000,000, at prices and on terms to be determined by market conditions at the time of any offering made under the shelf
registration statement. On January 27, 2006, the Company completed the sale of 5,750,000 shares of its common stock under this shelf registration statement, at a price to the public of $6.40 per share, including the exercise of the
over-allotment option by the underwriters. Net cash proceeds from this offering were $34,186,000 after deducting underwriter discounts and other offering expenses.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the
United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Concentrations

Financial instruments that
potentially subject the Company to credit risk consist of cash, cash equivalents and short-term investments to the extent of the amounts recorded on the balance sheets. The Companys cash, cash equivalents and short-term investments are placed
with high credit-quality financial institutions and issuers. The Company believes its established guidelines for investment of its excess cash maintain safety and liquidity through its policies on diversification and investment maturity.

The Company sources all if its fill-finish manufacturing and testing and final product storage and distribution operations, as well as its bulk
manufacturing, testing, and shipping operations, through single-source third-party suppliers and contractors and the Company obtains specific components and raw materials used to manufacture Increlex from either single-source or sole-source suppliers. If these contract facilities,
suppliers or contractors become unavailable to the Company for any reason, the Company may be delayed in manufacturing Increlex or may be unable to maintain validation of Increlex, which could delay or prevent the supply of commercial and clinical product, or delay or otherwise adversely affect revenues. The Company
strives to maintain an adequate level of inventory to mitigate this potential negative impact.



7



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##### Table of Contents

TERCICA, INC.

(A DEVELOPMENT STAGE COMPANY)

NOTES TO THE CONDENSED FINANCIAL STATEMENTS (continued)

(Unaudited)



Inventories

Inventories are stated at the lower of
cost or market and consist primarily of contract manufacturing costs for the production of Increlex that were incurred subsequent to the approval for marketing by the FDA. Cost is determined using the first-in, first-out basis. The valuation of inventory requires the Company to
estimate obsolete or excess inventory based on analysis of future demand for Increlex. If inventory costs exceed expected net realizable value due to obsolescence or lack of demand, inventory write-downs are recorded as deemed necessary by management for the difference between the cost and the
net realizable value. These write-downs are determined based on significant estimates by management and will be recorded in the period that impairment is first recognized.

Products released from inventory for product that is sold are recorded in cost of goods sold. Products released from inventory as free goods are recorded
in selling, general and administrative expenses. Accordingly, cost of inventory write-downs are allocated to cost of goods sold and selling, general and administrative expenses.

The Company recorded write-downs of approximately $1.0 million during the three and six months ended June 30, 2006, primarily related to one full lot
being rejected for commercial use. Cost of inventory write-downs allocated to cost of goods sold and selling, general and administrative expenses were $433,000 and $551,000, respectively, for the three months ended June 30, 2006. Cost of inventory
write-downs allocated to cost of goods sold and selling, general and administrative expenses were $442,000 and $586,000, respectively, for the six months ended June 30, 2006.

Inventories consisted of the following (in thousands):



|                |  |              |       |                  |   |      
|--------------- |  | ------------ | ----- | ---------------- | - | -----
|                |  | June 30,2006 |       | December 31,2005
|Raw materials   |  | $            | 1,420 |                  | $ | 319  
|Work-in-process |  |              |      |                  |   | 1,229
|Finished goods  |  |              | 470   |                  |   | 88   
|                |  |              |       |                  |   |      
|Total           |  | $            | 1,890 |                  | $ | 1,636
|                |  |              |       |                  |   |      

Revenue Recognition

Product sales consist of shipments of Increlex to specialty pharmacy distributors. Product sales are recognized when title passes to the customer, and the customer assumes the risks and rewards of ownership. This is generally at the time product arrives at the
customers location. Product sales consist of gross sales less provisions for discounts to customers, rebates to government agencies, product returns and other adjustments. These provisions are provided for in the same period the related
product sales are recorded. The Company began generating revenue from the sale of Increlex in January 2006.

Research and Product Development Costs

In accordance with Statement of Financial Accounting Standards (SFAS) No. 2, Accounting for Research and Development Costs,
research and development costs are expensed as incurred. Research and development expenses consist primarily of costs associated with manufacturing development activities prior to regulatory approval, clinical and regulatory activities, payroll and
related costs, non-cash stock-based compensation, laboratory supplies and certain allocated costs. Manufacturing development expenses include costs associated with the Companys contract manufacturers, including technology transfer,
pre-approval product manufacturing, process development, validation and qualification activities, analytical development, and compliance-related support, pre-FDA approval preparations for current good manufacturing practices (cGMP), quality control
and assurance activities, as well as personnel and related benefits and depreciation, prior to regulatory approval. Clinical and regulatory activities include the preparation, implementation and management of the Companys clinical trials and
assay development, as well as regulatory compliance, data management and biostatistics.

Clinical Trial Expenses

The Company contracts with third-party clinical research organizations to perform various clinical trial activities. The Company recognizes research and
development expenses for these contracted activities based upon a variety of factors, including actual and estimated patient enrollment rates, clinical site initiation activities, labor hours and other activity-based factors. The Company matches the
recording of expenses in the financial statements to the actual services received from and efforts expended by the related clinical research organization. Depending on the timing of payments to the service providers, the Company records prepaid
expenses and accruals relating to clinical trials based on the estimate of the degree of completion of the event or events as specified in each clinical study or trial contract. The Company monitors each of these factors to the extent possible and
adjusts estimates accordingly.



8



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##### Table of Contents

TERCICA, INC.

(A DEVELOPMENT STAGE COMPANY)

NOTES TO THE CONDENSED FINANCIAL STATEMENTS (continued)

(Unaudited)



Acquired In-Process Research and Development

Acquired
in-process research and development relates to in-licensed technology, intellectual property and know-how. The nature of the remaining efforts for completion of research and development activities surrounding rhIGF-1 generally include completion of
clinical trials, completion of manufacturing validation, interpretation of clinical and preclinical data and obtaining marketing approval from the FDA and other foreign regulatory bodies, the cost, length and success of which are extremely difficult
to determine. Numerous risks and uncertainties exist with timely completion of development projects, including clinical trial results, manufacturing process development results, ongoing feedback from regulatory authorities, including obtaining
marketing approval. In addition, products under development may never be successfully commercialized due to the uncertainties associated with the pricing of new pharmaceuticals, the cost of sales to produce these products in a commercial setting,
changes in the reimbursement environment, or the introduction of new competitive products. As a result of the uncertainties noted above, the Company charges in-licensed intellectual property and licenses for unapproved products to acquired
in-process research and development.

Stock-Based Compensation

On January 1, 2006, the Company adopted Statement of Financial Accounting Standards No. 123 (revised 2004), Share-Based Payment (SFAS No. 123R) which requires the measurement and
recognition of non-cash compensation expense for all share-based payment awards made to employees and directors including employee stock options and employee stock purchases related to the 2004 Employee Stock Purchase Plan (Purchase
Plan) based on estimated fair values. SFAS No. 123R supersedes the Companys previous accounting under Accounting Principles Board (APB) Opinion No. 25, Accounting for Stock Issued to Employees, for periods
beginning in fiscal 2006. In March 2005, the Securities and Exchange Commission issued Staff Accounting Bulletin No. 107 (SAB 107) relating to SFAS No. 123R. The Company has applied the provisions of SAB 107 in its adoption of
SFAS No. 123R. See Note 7Stock-Based Compensation for further detail.

After the adoption of SFAS No. 123R, stock
compensation arrangements with non-employee service providers continue to be accounted for in accordance with SFAS No. 123 and Emerging Issues Task Force (EITF) No. 96-18, Accounting for Equity Instruments that Are Issued to
Other than Employees for Acquiring, or in Conjunction with Selling, Goods or Services, using a fair value approach. The compensation costs of these arrangements are subject to remeasurement over the vesting terms as earned.

Comprehensive Loss

Comprehensive loss is comprised
of net loss and unrealized gains/losses on available-for-sale securities in accordance with SFAS No. 130, Reporting Comprehensive Income. The following table presents the calculation of comprehensive loss (in thousands):



|                                                     |  |                            |         |   |                           |   |         |      |  |   |         |   |  |   |         |  
|---------------------------------------------------- |  | -------------------------- | ------- | - | ------------------------- | - | ------- | ---- |  | - | ------- | - |  | - | ------- | -
|                                                     |  | Three Months EndedJune 30, |         |   | Six Months Ended June 30, |  
|                                                     |  | 2006                       |         |   | 2005                      |   |         | 2006 |  |   | 2005    |  
|Net loss, as reported                                |  | $                          | (14,684 | ) |                           | $ | (12,401 | )    |  | $ | (28,953 | ) |  | $ | (21,509 | )
|Change in unrealized losses on marketable securities |  |                            | (5      | ) |                           |   | 36      |      |  |   | (13     | ) |  |   | 48      |  
|                                                     |  |                            |         |   |                           |   |         |      |  |   |         |   |  |   |         |  
|Comprehensive loss                                   |  | $                          | (14,689 | ) |                           | $ | (12,365 | )    |  | $ | (28,966 | ) |  | $ | (21,461 | )
|                                                     |  |                            |         |   |                           |   |         |      |  |   |         |   |  |   |         |  

2. Net Loss Per Share

Basic net loss per share allocable to common stockholders is calculated by dividing the net loss allocable to common stockholders by the weighted-average number of common shares outstanding for the period, without
consideration for common stock equivalents. Diluted net loss per share allocable to common stockholders is computed by dividing the net loss allocable to common stockholders by the weighted-average number of common share equivalents outstanding for
the period determined using the treasury-stock method. For purposes of this calculation, common stock subject to repurchase by the Company, preferred stock, options, and warrants are considered to be common stock equivalents and are only included in
the calculation of diluted net loss per share allocable to common stockholders when their effect is dilutive.



9



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##### Table of Contents

TERCICA, INC.

(A DEVELOPMENT STAGE COMPANY)

NOTES TO THE CONDENSED FINANCIAL STATEMENTS (continued)

(Unaudited)



|                                                                                      |  |                            |         |   |                           |   |         |      |  |   |         |   |  |   |         |  
|------------------------------------------------------------------------------------- |  | -------------------------- | ------- | - | ------------------------- | - | ------- | ---- |  | - | ------- | - |  | - | ------- | -
|                                                                                      |  | Three Months EndedJune 30, |         |   | Six Months Ended June 30, |  
|(In thousands, except per share data)                                                 |  | 2006                       |         |   | 2005                      |   |         | 2006 |  |   | 2005    |  
|Historical                                                                            |  |                            |         |   |                           |   |         |      |  |   |         |   |  |   |         |  
|Numerator:                                                                            |  |                            |         |   |                           |   |         |      |  |   |         |   |  |   |         |  
|Net loss allocable to common stockholders                                             |  | $                          | (14,684 | ) |                           | $ | (12,401 | )    |  | $ | (28,953 | ) |  | $ | (21,509 | )
|                                                                                      |  |                            |         |   |                           |   |         |      |  |   |         |   |  |   |         |  
|Denominator:                                                                          |  |                            |         |   |                           |   |         |      |  |   |         |   |  |   |         |  
|Weighted-average common shares outstanding                                            |  |                            | 37,508  |   |                           |   | 31,292  |      |  |   | 36,580  |   |  |   | 29,742  |  
|Less: Weighted-average unvested common shares subject to repurchase                   |  |                            |        |   |                           |   | (35     | )    |  |   | (1      | ) |  |   | (40     | )
|                                                                                      |  |                            |         |   |                           |   |         |      |  |   |         |   |  |   |         |  
|Denominator for basic and diluted net loss per share allocable to common stockholders |  |                            | 37,508  |   |                           |   | 31,257  |      |  |   | 36,579  |   |  |   | 29,702  |  
|                                                                                      |  |                            |         |   |                           |   |         |      |  |   |         |   |  |   |         |  
|Basic and diluted net loss per share allocable to common stockholders                 |  | $                          | (0.39   | ) |                           | $ | (0.40   | )    |  | $ | (0.79   | ) |  | $ | (0.72   | )
|                                                                                      |  |                            |         |   |                           |   |         |      |  |   |         |   |  |   |         |  



|                                                                                                                                   |  |                |  |      
|---------------------------------------------------------------------------------------------------------------------------------- |  | -------------- |  | -----
|                                                                                                                                   |  | June 30,      
|                                                                                                                                   |  | 2006           |  | 2005 
|                                                                                                                                   |  | (In thousands)
|Historical outstanding dilutive securities not included in diluted net loss per share allocable to common stockholders
calculation |  |                |  |      
|Options to purchase common stock                                                                                                   |  | 4,125          |  | 2,759
|Warrants                                                                                                                           |  | 260            |  |     
|                                                                                                                                   |  |                |  |      
|                                                                                                                                   |  | 4,385          |  | 2,759
|                                                                                                                                   |  |                |  |      



10



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##### Table of Contents

TERCICA, INC.

(A DEVELOPMENT STAGE COMPANY)

NOTES TO THE CONDENSED FINANCIAL STATEMENTS (continued)

(Unaudited)



3. Cash, Cash Equivalents and Short-Term Investments

The following is a summary of available-for-sale securities (in thousands):



|                                                           |  |                   |        |                      |   |                       |  |   |                     |   |  |   |       
|---------------------------------------------------------- |  | ----------------- | ------ | -------------------- | - | --------------------- |  | - | ------------------- | - |  | - | ------
|                                                           |  | June 30, 2006    
|                                                           |  | AmortizedCost     |        | GrossUnrealizedGains |   | GrossUnrealizedLosses |  |   | EstimatedFair Value
|Available-for-sale debt securities maturing within 1 year: |  |                   |        |                      |   |                       |  |   |                     |   |  |   |       
|Auction market preferred                                   |  | $                 | 26,500 |                      | $ |                      |  | $ |                    |   |  | $ | 26,500
|Commercial paper                                           |  |                   | 16,943 |                      |   | 4                     |  |   |                    |   |  |   | 16,947
|Corporate bonds                                            |  |                   | 2,419  |                      |   |                      |  |   | (7                  | ) |  |   | 2,412 
|Federal agency bonds                                       |  |                   | 8,908  |                      |   |                      |  |   | (11                 | ) |  |   | 8,897 
|Repurchase agreements                                      |  |                   | 175    |                      |   |                      |  |   |                    |   |  |   | 175   
|Asset-backed securities                                    |  |                   | 7,498  |                      |   |                       |  |   | (1                  | ) |  |   | 7,497 
|                                                           |  |                   |        |                      |   |                       |  |   |                     |   |  |   |       
|Total available-for-sale debt securities                   |  | $                 | 62,443 |                      | $ | 4                     |  | $ | (19                 | ) |  | $ | 62,428
|                                                           |  |                   |        |                      |   |                       |  |   |                     |   |  |   |       
|                                                           | 
|                                                           |  | December 31, 2005
|                                                           |  | AmortizedCost     |        | GrossUnrealizedGains |   | GrossUnrealizedLosses |  |   | EstimatedFairValue 
|Available-for-sale debt securities maturing within 1 year: |  |                   |        |                      |   |                       |  |   |                     |   |  |   |       
|Auction market preferred                                   |  | $                 | 36,150 |                      | $ |                      |  | $ |                    |   |  | $ | 36,150
|Commercial paper                                           |  |                   | 13,468 |                      |   | 3                     |  |   |                    |   |  |   | 13,471
|Federal agency bonds                                       |  |                   | 5,477  |                      |   |                      |  |   | (5                  | ) |  |   | 5,472 
|Repurchase agreements                                      |  |                   | 3,000  |                      |   |                      |  |   |                    |   |  |   | 3,000 
|                                                           |  |                   |        |                      |   |                       |  |   |                     |   |  |   |       
|Total available-for-sale debt securities                   |  | $                 | 58,095 |                      | $ | 3                     |  | $ | (5                  | ) |  | $ | 58,093
|                                                           |  |                   |        |                      |   |                       |  |   |                     |   |  |   |       

The Companys financial instruments are classified as follows (in thousands):



|                          |  |              |        |                  |   |       
|------------------------- |  | ------------ | ------ | ---------------- | - | ------
|                          |  | June 30,2006 |        | December 31,2005
|Cash                      |  | $            | 3,993  |                  | $ | 873   
|Cash equivalents          |  |              | 16,782 |                  |   | 13,944
|                          |  |              |        |                  |   |       
|Cash and cash equivalents |  |              | 20,775 |                  |   | 14,817
|Short-term investments    |  |              | 45,306 |                  |   | 43,809
|Long-term restricted cash |  |              | 340    |                  |   | 340   
|                          |  |              |        |                  |   |       
|Total                     |  | $            | 66,421 |                  | $ | 58,966
|                          |  |              |        |                  |   |       

Realized losses on the sale of available-for-sale securities for the periods presented were
immaterial.

4. Litigation

On
December 20, 2004, the Company initiated patent infringement proceedings against Avecia Limited and Insmed Incorporated as co-defendants in the High Court of Justice (Chancery Division Patents Court) in the United Kingdom. There is no trial
date set for this action. On December 23, 2004, the Company, with Genentech, initiated patent infringement proceedings against Insmed Incorporated in the U.S. District Court for the Northern District of California. The Company initiated these
proceedings because it believes that Insmed and Avecia are infringing and/or have infringed on the Companys patents that cover Insmeds products use and manufacture. The trial date for the proceedings in the U.S. District Court for
the Northern District of California is November 6, 2006. On June 30, 2006, this court issued rulings on several claims



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##### Table of Contents

TERCICA, INC.

(A DEVELOPMENT STAGE COMPANY)

NOTES TO THE CONDENSED FINANCIAL STATEMENTS (continued)

(Unaudited)



construction issues and cross-motions for summary judgment. The court granted the Company summary judgment that Insmed infringes claims 1, 2 and 9 of U.S. Patent
No. 6,331,414, and granted the Company summary judgment that certain publications asserted by Insmed against the validity of U.S. Patent No. 5,187,151 do not qualify as prior art and cannot be used to attack the validity of that patent. In
addition, the court denied Insmed summary judgment that Insmed does not infringe any of claims 1 through 4, 9 and 10 of U.S. Patent No. 6,331,414, denied Insmed summary judgment that claims 1 through 4, 9 and 10 of U.S. Patent
No. 6,331,414 are invalid under 35 U.S.C. §101 and §112, denied Insmed summary judgment that Insmed does not infringe claims 1, 4, 5 and 7 of U.S. Patent No. 5,187,151, and granted Insmed summary judgment that no recovery can be
had against it based on any activities conducted by Celtrix Pharmaceuticals, Inc. prior to December 23, 1998. However, on July 14, 2006 Insmed filed a request seeking leave of the court to file a motion for partial reconsideration of the
summary judgment order with respect to infringement of claims 1 and 2 of U.S. Pat. No. 6,331,414.

The Company cannot predict the
outcome of its litigation against Avecia and Insmed in the United Kingdom or the outcome of its litigation against Insmed in the United States. Moreover, the Company cannot predict the cost of such litigation, which may require a substantial
diversion of the Companys financial assets and other resources and consequently prevent the Company from allocating sufficient resources to the development of its rhIGF-1 programs, and which may have a material adverse effect on the
Companys business. In addition, if the outcome of the Companys litigation in the United Kingdom is not favorable to the Company, the Company is likely to be found liable for the opposing parties costs incurred in connection with
the litigation, and the Company could be found liable for an award of additional damages to the opposing parties if the court decides that the Companys claims of patent infringement are without sufficient merit or not pursued in good faith. If
in the Companys litigation in the United States, the court decides that a defendant prevails, and the defendant establishes by clear and convincing evidence that the case is exceptional (e.g., the Companys claims of patent infringement
were not pursued in good faith), the Company could be liable for an award of the opposing partys costs and legal fees incurred in connection with the litigation and/or an award of other damages. Any such award or awards to the opposing parties
could substantially increase the Companys costs and exacerbate the negative impact that an unfavorable outcome in the case(s) could have on the Companys business. Further, it is not uncommon in cases of this kind for a defendant to
assert counterclaims, which could significantly increase the Companys costs, potential liability for damages, and other risks arising from these lawsuits, and a court could find the Company liable for any such damages caused by Genentech as
well.

Insmed and Avecia have challenged the validity of European Patent No. 0 571 417 in our litigation in the United Kingdom, and Insmed
has challenged the validity of U.S. Patent Nos. 5,187,151, 6,331,414 and 5,258,287 in our litigation in the United States. Even if we voluntarily drop our claims of patent infringement in our litigation in the United States and/or the United
Kingdom, the opposing party or parties may pursue counterclaims for a declaratory judgment of invalidity against the asserted patent or patents in such action(s). If in our litigation in the United States the court awards a declaratory judgment
finding invalid one or more of the claims of U.S. Patent No. 5,187,151, one or more of the claims of U.S. Patent No. 5,258,287, and/or one or more of the claims of U.S. Patent No. 6,331,414, and if the courts finding of
invalidity in such declaratory judgment is upheld in whole or in part on appeal or if no appeal is taken, we would be unable to exclude others from using the affected claim or claims in the United States, which may decrease our ability to generate
significant revenue from our rhIGF-1 programs and/or render any further development and commercialization of rhIGF-1 commercially infeasible for us. If in our litigation in the United Kingdom, the court awards a declaratory judgment finding invalid
one or more of the claims of European Patent No. 0 571 417, and if the courts finding of invalidity in such declaratory judgment is upheld in whole or in part on appeal or if no appeal is taken, we would be unable to exclude others from using
the affected claim or claims in the United Kingdom, and any such finding of invalidity may have a similar adverse impact on the enforceability of the affected claim or claims in one or more of the other European countries in which European Patent
No. 0 571 417 would otherwise be in force, which may decrease our ability to generate significant revenue from our rhIGF-1 programs and/or render any further development and commercialization of rhIGF-1 commercially infeasible for us.

In December 2005, the Company filed a complaint against Insmed for False Advertising and Unfair Competition, Case No. C-05-5027 SBA, in the U.S. District
Court for the Northern District of California. The complaint alleged that Insmed made false, misleading and deceptive statements about Increlex and its product. The Company was seeking monetary and injunctive relief. On June 9, 2006 the Court
granted Insmeds motion to dismiss the case. On June 12, the Company filed a complaint against Insmed for False Advertising, Unfair Competition and Intentional Interference with Prospective Business Relations, Case No. 3:06cv403,
in the U.S. District Court for the Eastern District of Virginia. The complaint alleged that Insmed made false, misleading and deceptive statements about Increlex and its product and intentionally interfered with the Companys business
relationships. The Company is seeking monetary and injunctive relief. On June 23, 2006, the Company filed its First Amended Complaint. On July 27, 2006, Insmed filed a motion to dismiss the case. The Court has not yet set a hearing date
for this motion.



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##### Table of Contents

TERCICA, INC.

(A DEVELOPMENT STAGE COMPANY)

NOTES TO THE CONDENSED FINANCIAL STATEMENTS (continued)

(Unaudited)



From time to time, the Company may become involved in claims and other legal matters arising in the ordinary course of business. Management is not
currently aware of any other matters that may have a material adverse affect on the financial position, results of operations or cash flows of the Company.

5. Senior Credit Facility

On January 21, 2005, the Company entered into a Loan Agreement (the Loan
Agreement) with Venture Leasing & Lending IV, Inc. (VLL) under which the Company had the option to draw down funds in the aggregate principal amount of up to $15,000,000 through December 31, 2005. The Company paid a
$75,000 fee as part of this Loan Agreement and issued a total of 112,500 shares of its common stock to an affiliate of VLL. The 112,500 shares of common stock issued were recorded at fair market value of $1,002,000 on the dates of issuance. As of
December 31, 2005, the entire amount was recognized as interest expense. The facility expired on December 31, 2005, and the Company did not borrow any funds under this facility.

6. Committed Equity Financing Facility

On
October 14, 2005, the Company entered into a committed equity financing facility (CEFF) with Kingsbridge Capital Limited (Kingsbridge), which entitles the Company to sell and obligates Kingsbridge to purchase, a maximum
of approximately 6.0 million newly issued shares of the Companys common stock over a period of three years for cash up to an aggregate of $75,000,000, subject to certain conditions and restrictions. The Company may draw down under the
CEFF in tranches of up to the lesser of $7,000,000 or 2% of the Companys market capitalization at the time of the draw down of such tranche, subject to certain conditions. The common stock to be issued for each draw down will be issued and
priced over an eight-day pricing period at discounts ranging from 6% to 10% from the volume weighted average price of the Companys common stock during the pricing period. During the term of the CEFF, Kingsbridge may not short the
Companys stock, nor may it enter into any derivative transaction directly related to the Companys stock. The minimum acceptable purchase price, prior to the application of the appropriate discount for any shares to be sold to Kingsbridge
during the eight-day pricing period, is determined by the greater of $3.00 or 90% of the Companys closing share price on the trading day immediately prior to the commencement of each draw down. In connection with the CEFF, the Company issued a
warrant to Kingsbridge to purchase up to 260,000 shares of the Companys common stock at an exercise price of $13.12 per share. The exercise term of the warrant is five years beginning on April 14, 2006. The warrant was valued on the date
of grant using the Black-Scholes method using the following assumptions: a risk-free interest rate of 4.1%, a life of 5.5 years, no dividend yield and a volatility factor of 0.5. The estimated value of this warrant was $1,196,000 and was recorded as
a contra-equity amount in additional paid-in capital in 2005.

On November 9, 2005, the Company filed a shelf registration statement
with the SEC relating to the resale of up to 6,296,912 shares of common stock that the Company may issue to Kingsbridge pursuant to a common stock purchase agreement and the warrant agreement noted above. The Company will not sell common stock under
this registration statement to any party other than Kingsbridge and will not receive any of the proceeds from the sale of shares by Kingsbridge.

During the six months ended June 30, 2006, the Company did not draw down any funds under the CEFF and had not issued any shares pursuant to the CEFF as of June 30, 2006.

7. Stock-Based Compensation

On January 1, 2006,
the Company adopted the provisions of SFAS No. 123R, Share-Based Payment. SFAS No. 123R establishes accounting for stock-based awards made to employees and directors. Accordingly, stock-based compensation expense is measured at
grant date, based on the fair value of the award, and is recognized as expense over the remaining requisite service period. The Company previously applied APB Opinion No. 25, Accounting for Stock Issued to Employees, and related
interpretations and provided the required pro forma disclosures of SFAS No. 123, Accounting for Stock-Based Compensation. Total stock-based compensation expense of $1,647,000 and $2,764,000 was recorded during the three and six months
ended June 30, 2006, respectively.



13



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##### Table of Contents

TERCICA, INC.

(A DEVELOPMENT STAGE COMPANY)

NOTES TO THE CONDENSED FINANCIAL STATEMENTS (continued)

(Unaudited)



The Company has four active stock-based compensation plans, which are described below.

2004 Stock Plan

The Companys Board of Directors adopted the 2004 Stock Plan (formerly the 2003
Stock Plan) in September 2003 and the Companys stockholders approved it in October 2003. The 2004 Stock Plan became effective on March 16, 2004. The 2004 Stock Plan provides for the grant of incentive stock options to employees and for
the grant of nonstatutory stock options, stock purchase rights, restricted stock, stock appreciation rights, performance units and performance shares to the Companys employees, directors and non-employee service providers. Shares reserved
under the 2004 Stock Plan include (a) shares reserved but unissued under the Companys 2002 Executive Stock Plan and the Companys 2002 Stock Plan at March 16, 2004, (b) shares returned to the 2002 Executive Stock Plan and
the 2002 Stock Plan as the result of cancellation or forfeiture of options or the repurchase of shares issued under the 2002 Executive Stock Plan and the 2002 Stock Plan, and (c) annual increases in the number of shares available for issuance
on the first day of each year beginning on January 1, 2005 equal to the lesser of:



| |  |  | 4% of the outstanding shares of common stock on the first day of the Companys fiscal year,
| | - |  | -------------------------------------------------------------------------------------------



| |  |  | 1,250,000 shares, or
| | - |  | --------------------



| |  |  | an amount the Companys Board of Directors may determine.
| | - |  | ---------------------------------------------------------

Incentive stock options must be granted with exercise prices not less than 100% of fair market value of the common stock on the date of grant. Nonqualified stock options may be granted with an exercise price as determined by the
Companys Board of Directors; however, nonstatutory stock options intended to qualify as performance-based compensation within the meaning of Section 162(m) of the Internal Revenue Code must be granted with exercise prices not
less than 100% of fair market value on the date of grant. The exercise price of any incentive stock option granted to a 10% stockholder will not be less than 110% of the fair market value of the common stock on the date of grant. Options granted
under the 2004 Stock Plan expire no later than 10 years from the date of grant; however, incentive stock options granted to individuals owning over 10% of the total combined voting power of all classes of stock expire no later than five years from
the date of grant. Options granted under the 2004 Stock Plan vests over periods determined by the Companys Board of Directors, generally over four years. The 2004 Stock Plan has a term of 10 years.

2002 Stock Plan and 2002 Executive Stock Plan

The terms of the 2002 Stock Plan and 2002 Executive Stock Plan (the 2002 Plans) are similar to those of the Companys 2004 Stock Plan. The shares reserved but unissued under the 2002 Plans as of March 15, 2004 were
reserved for issuance under the 2004 Stock Plan. In addition, any shares returned to the 2002 Plans as a result of cancellation or forfeiture of options or repurchases of shares after March 16, 2004 that were issued under the 2002 Plans are
added to the shares reserved for the 2004 Stock Plan. Effective as of March 16, 2004, no additional stock options were issuable under the 2002 Plans.

As of June 30, 2006, there were a total of 6,453,834 shares authorized for issuance under the 2004 Stock Plan and the 2002 Plans.

2004 Employee Stock Purchase Plan

The Companys Board of Directors adopted the 2004 Employee
Stock Purchase Plan (formerly the 2003 Stock Purchase Plan) in September 2003 and the Companys stockholders approved it in October 2003. The 2004 Employee Stock Purchase Plan (the Purchase Plan) became effective on March 16,
2004. As of June 30, 2006, there were a total of 347,979 shares reserved for issuance under the Purchase Plan. In addition, the Purchase Plan provides for annual increases in the number of shares available for issuance under the Purchase Plan
on the first day of each year, beginning with January 1, 2005 equal to the lesser of:



| |  |  | 0.5% of the outstanding shares of common stock on the first day of the Companys fiscal year,
| | - |  | ---------------------------------------------------------------------------------------------



| |  |  | 125,000 shares, or
| | - |  | ------------------



| |  |  | such other amount as may be determined by the Companys Board of Directors.
| | - |  | ---------------------------------------------------------------------------



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TERCICA, INC.

(A DEVELOPMENT STAGE COMPANY)

NOTES TO THE CONDENSED FINANCIAL STATEMENTS (continued)

(Unaudited)



The Purchase Plan permits eligible employees to purchase common stock at a discount through payroll deductions during defined offering periods. Offering
periods are successive and overlapping of 24 months duration. Each offering period includes four six-month purchase periods and generally begins on the first trading day on or after May 15 and November 15 of each year. The price at
which the stock is purchased is equal to the lower of 85% of the fair market value of the common stock at the beginning of an offering period or after a purchase period ends.

Adoption of SFAS No. 123R

On January 1, 2006, the Company adopted SFAS No. 123R using
the modified prospective transition method. Under that transition method, non-cash compensation expense was recognized in the three and six months ended June 30, 2006 and included the following: (a) compensation expense related to any
share-based payments granted through, but not yet vested as of January 1, 2006, and (b) compensation expense for any share-based payments granted subsequent to January 1, 2006, based on the grant-date fair value estimated in
accordance with the provisions of SFAS No. 123R. The Company recognizes non-cash compensation expense for the fair values of these share-based awards on a straight-line basis over the requisite service period of each of these awards. Because
non-cash stock compensation expense is based on awards ultimately expected to vest, it has been reduced by an estimate for future forfeitures. SFAS No. 123R requires forfeitures to be estimated at the time of grant and revised, if necessary, in
subsequent periods if actual forfeitures differ from those estimates. The Companys financial statements as of and for the three and six months ended June 30, 2006 reflect the impact of SFAS No. 123R. In accordance with the modified
prospective transition method, the Companys financial statements for prior periods have not been restated to reflect, and do not include, the impact of SFAS No. 123R.

During the period from February 1, 2003 through January 31, 2004, certain stock options were granted with exercise prices that were below the
reassessed fair value of the common stock at the date of grant. Total deferred stock compensation of $10,873,000 was recorded in accordance with APB Opinion No. 25, and was being amortized to expense over the related vesting period of the
options. From inception through December 31, 2005, stock-based compensation expense of $5,740,000 was recognized and $2,542,000 was reversed as a result of employee terminations. The remaining deferred stock compensation balance of $2,591,000
as of December 31, 2005 was reversed on January 1, 2006 upon adoption in accordance with the provisions of SFAS No. 123R.

The non-cash stock-based compensation expense related to SFAS No. 123R for the three and six months ended June 30, 2006 was $1,647,000 and $2,764,000, respectively. If the Company had continued to account for stock-based
compensation expense under APB Opinion No. 25, the non-cash stock-based compensation expense for the three and six months ended June 30, 2006 would have been $420,000 and $840,000, respectively. As a result of adopting SFAS No. 123R
on January 1, 2006, the Companys net loss for the three and six months ended June 30, 2006 were $1,227,000 and $1,924,000 higher, respectively, and $0.03 and $0.05 higher, respectively, than if the Company had continued to account
for stock-based compensation expense under APB Opinion No. 25.

The following table presents the pro forma effect on net loss
allocable to common stockholders and net loss per share if the Company had applied the fair value recognition provisions of SFAS No. 123 to options granted under the Companys share-based compensation arrangements during the first and
second quarters of fiscal 2005 (in thousands, except per share amounts):



|                                                                                                |  |                           |         |   |                         |   |         |  
|----------------------------------------------------------------------------------------------- |  | ------------------------- | ------- | - | ----------------------- | - | ------- | -
|                                                                                                |  | Three MonthsEndedJune 30, |         |   | Six MonthsEnded June 30 |  
|(In thousand except per share data)                                                             |  | 2005                      |         |   | 2005                    |  
|Net loss allocable to common stockholders, as reported                                          |  | $                         | (12,401 | ) |                         | $ | (21,509 | )
|Plus: Employee stock compensation expense based on intrinsic value method                       |  |                           | 593     |   |                         |   | 1,212   |  
|Less: Employee stock compensation expense determined under the fair value method for all awards |  |                           | (1,649  | ) |                         |   | (2,611  | )
|                                                                                                |  |                           |         |   |                         |   |         |  
|Pro forma net loss allocable to common stockholders                                             |  | $                         | (13,457 | ) |                         | $ | (22,908 | )
|                                                                                                |  |                           |         |   |                         |   |         |  
|Net loss per share allocable to common stockholders:                                            |  |                           |         |   |                         |   |         |  
|Basic and diluted, as reported                                                                  |  | $                         | (0.40   | ) |                         | $ | (0.72   | )
|                                                                                                |  |                           |         |   |                         |   |         |  
|Basic and diluted, pro forma                                                                    |  | $                         | (0.43   | ) |                         | $ | (0.77   | )
|                                                                                                |  |                           |         |   |                         |   |         |  



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##### Table of Contents

TERCICA, INC.

(A DEVELOPMENT STAGE COMPANY)

NOTES TO THE CONDENSED FINANCIAL STATEMENTS (continued)

(Unaudited)



Other than options granted to non-employee service providers and the grant of certain stock options to employees with exercise prices that were below the
reassessed fair value of the common stock as the date of the grant, there was no other stock-based compensation recognized during the three and six months ended June 30, 2005.

The fair value of each option grant is estimated at the grant date using the Black-Scholes model with the following assumptions:



|                        |  |                            |   |  |                          |   |  |      |   |  |      |  
|----------------------- |  | -------------------------- | - |  | ------------------------ | - |  | ---- | - |  | ---- | -
|                        |  | Three Months EndedJune 30, |   |  | Six Months EndedJune 30, |  
|                        |  | 2006                       |   |  | 2005                     |   |  | 2006 |   |  | 2005 |  
|Expected volatility     |  | 69                         | % |  | 50                       | % |  | 76   | % |  | 50   | %
|Expected term (years)   |  | 5.9                        |   |  | 3.3                      |   |  | 6.2  |   |  | 3.7  |  
|Risk-free interest rate |  | 5.7                        | % |  | 3.7                      | % |  | 5.2  | % |  | 3.7  | %
|Dividend yield          |  |                           |   |  |                         |   |  |     |   |  |     |  

The Companys computation of expected volatility for the three and six months ended
June 30, 2006 is based on an average of the historical volatility of the Companys stock and the historical volatility of a peer-group of similar companies. The Companys computation of expected term in the three and six months ended
June 30, 2006 utilizes the simplified method in accordance with SAB 107. The risk-free interest rate for periods within the contractual life of the option is based on interest rate swap rates in effect at the time of grant. The Company
recognizes stock-based compensation expense for the fair values of these awards on a straight-line basis over the requisite service period of each of these awards.

A summary of activity of all options are as follows (in thousands, except per share data and contractual term):



|                                 |  |        |   |  |                               |       |                                          |     |                         |   |      
|-------------------------------- |  | ------ | - |  | ----------------------------- | ----- | ---------------------------------------- | --- | ----------------------- | - | -----
|                                 |  | Shares |   |  | Weighted-AverageExercisePrice |       | Weighted-AverageRemainingContractualTerm |     | AggregateIntrinsicValue
|Outstanding at December 31, 2005 |  | 2,945  |   |  | $                             | 7.49  |                                          |     |                         |   |      
|Options granted                  |  | 1,572  |   |  |                               | 6.90  |                                          |     |                         |   |      
|Options exercised                |  | (172   | ) |  |                               | 0.80  |                                          |     |                         |   |      
|Options forfeited                |  | (220   | ) |  |                               | 10.56 |                                          |     |                         |   |      
|                                 |  |        |   |  |                               |       |                                          |     |                         |   |      
|Outstanding at June 30, 2006     |  | 4,125  |   |  | $                             | 7.38  |                                          | 8.9 |                         | $ | 1,724
|                                 |  |        |   |  |                               |       |                                          |     |                         |   |      
|Exercisable at June 30, 2006     |  | 3,122  |   |  | $                             | 7.00  |                                          | 8.9 |                         | $ | 1,556
|                                 |  |        |   |  |                               |       |                                          |     |                         |   |      

The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value,
based on the Companys closing stock price of $5.29 on June 30, 2006, which would have been received by the option holders had all option holders exercised their options on June 30, 2006. This amount changes based on the fair market
value of the Companys stock. Total intrinsic value of options exercised for the three and six months ended June 30, 2006 was $160,000 and $1,002,000, respectively. The weighted-average grant date fair value of options granted during the
three and six months ended June 30, 2006 was $3.07 and $4.91 per share, respectively. Total fair value of options vested for the three and six months ended June 30, 2006 was $866,000 and $1,552,000, respectively.

As of June 30, 2006, unrecognized stock-based compensation expense related to stock options of $13,923,000 was expected to be recognized over a
weighted-average period of 2.9 years.



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##### Table of Contents

TERCICA, INC.

(A DEVELOPMENT STAGE COMPANY)

NOTES TO THE CONDENSED FINANCIAL STATEMENTS (continued)

(Unaudited)



A summary of activity of all nonvested stock options are as follows (in thousands, except per share data):



|                                             |  |        |   |  |                                      |     
|-------------------------------------------- |  | ------ | - |  | ------------------------------------ | ----
|                                             |  | Shares |   |  | Weighted-AverageGrant Date FairValue
|Nonvested stock options at December 31, 2005 |  | 2,259  |   |  | $                                    | 8.01
|Granted                                      |  | 1,572  |   |  |                                      | 6.90
|Vested                                       |  | (577   | ) |  |                                      | 6.60
|Forfeited                                    |  | (32    | ) |  |                                      | 9.68
|                                             |  |        |   |  |                                      |     
|Nonvested stock options at June 30, 2006     |  | 3,222  |   |  | $                                    | 7.70
|                                             |  |        |   |  |                                      |     

Employee Stock Purchase Plan

For the three and six months ended June 30, 2006, we recorded approximately $93,000 and $165,000, respectively, of compensation expense related to the Purchase Plan. During the six months ended June 30,
2006, 42,371 shares were purchased under the Purchase Plan. The fair value of awards issued under the Purchase Plan is measured using assumptions similar to those used for stock options, except that the term of the award is 1.19 years

Disclosures Pertaining to All Stock-Based Compensation Plans

Cash received from option exercises and the Purchase Plan contributions under all share-based payment arrangements for the six months ended June 30, 2006 and 2005 was $308,000 and $311,000, respectively. Because of the Companys
net operating losses, the Company did not realize any tax benefits for the tax deductions from share-based payment arrangements during the six months ended June 30, 2006 and 2005.

8. Manufacturing Services Agreement

In December 2002, the Company entered into a development and
commercial supply agreement (the Manufacturing Agreement) with Cambrex Bio Science Baltimore, Inc. (Cambrex Baltimore). At that time, the Company began to transfer its manufacturing technology to Cambrex Baltimore in order
for them to establish the process for rhIGF-1 fermentation and purification. Further, under the terms of the Manufacturing Agreement, Cambrex Baltimore is obligated to annually provide the Company with certain minimum quantities of bulk rhIGF-1 drug
substance. The Company has a non-cancelable obligation to reimburse Cambrex Baltimore on a time and materials and per batch basis in connection with the commercial production of Increlex of approximately $6,723,000 through December 31, 2006.

Our operating lease commitments disclosed in the notes to the financial statements of our Annual Report on Form 10-K for year ended
December 31, 2005, as amended, have not changed significantly.

9. Subsequent Event

On July 18, 2006, the Company entered into a Stock Purchase and Master Transaction Agreement (the Purchase Agreement) with Ipsen, S.A.
(Ipsen). Under the terms of the Purchase Agreement, the Company has agreed to issue to Ipsen (or its designated affiliate): (i) 12,527,245 shares of common stock (the Shares) at a premium to market; (ii) a
convertible note in the principal amount of $25,037,000 (the First Convertible Note); (iii) a second convertible note in the principal amount of 30,000,000 (the Second Convertible Note); (iv) a third convertible
note in the principal amount of $15,000,000 (the Third Convertible Note); and (v) a warrant to purchase a minimum of 4,948,795 shares of the Companys common stock (the Warrant). At the first closing under the
Purchase Agreement (the First Closing), subject to the satisfaction or waiver of the conditions thereto, including the approval by the Companys stockholders of the required aspects of the transactions contemplated by the Purchase
Agreement and the expiration of the waiting period under the Hart-Scott-Rodino Antitrust & Improvements Act of 1976, as amended, the Company would issue the Shares, the First Convertible Note and the Warrant, and Ipsen would deliver to the
Company $77,318,944 for the Shares and $25,037,000 for the First Convertible Note. The Purchase Agreement provides that, simultaneously with the First Closing, the Company and Ipsen (and/or affiliates thereof) would also enter into licensing and
certain other agreements, including an agreement with respect to certain corporate governance matters and providing Ipsen with the right to nominate a certain number of directors for election to the



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TERCICA, INC.

(A DEVELOPMENT STAGE COMPANY)

NOTES TO THE CONDENSED FINANCIAL STATEMENTS (continued)

(Unaudited)



Companys Board of Directors, and the Company would effect amendments to its charter documents and would adopt a stockholder rights plan. Pursuant to
the licensing agreements, among other things, the Company would grant to Ipsen exclusive rights to sell Increlex in all regions of the world, except the United States, Japan, Canada, certain Middle Eastern countries and Taiwan, and Ipsen would grant to the Company exclusive rights to sell
Somatuline® Autogel®, a leading product in the European acromegaly market, in the United States and Canada. Further, the Company and Ipsen would grant to each other product development rights and share the costs for improvements to, or new
indications for, Somatuline® Autogel® and Increlex. In addition, the Company and Ipsen would agree to rights of first negotiation for their respective endocrine pipelines. At the second closing, subject to the satisfaction or waiver of the conditions thereto, the
Company would issue the Second Convertible Note and the Third Convertible Note, and Ipsen would deliver the sum of 30,000,000 and $15,000,000 to the Company. A description of the material terms of the Purchase Agreement and the transactions
contemplated thereby is included under the caption Item 1.01. Entry into a Material Definitive Agreement in the Companys Current Report on Form 8-K, filed with the Securities and Exchange Commission on July 24, 2006, and is
incorporated by reference herein. The Company is currently evaluating the accounting treatment for this transaction.



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##### Table of Contents

ITEM 2. MANAGEMENTS DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.

This report includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities and Exchange Act of 1934, as amended. All statements
other than statements of historical facts are forward-looking statements for purposes of these provisions, including any projections of earnings, revenues or other financial items, any statement of the plans and objectives of management
for future operations, any statements concerning proposed new products or licensing or collaborative arrangements, any statements regarding future economic conditions or performance, and any statement of assumptions underlying any of the foregoing.
In some cases, forward-looking statements can be identified by the use of terminology such as may, will, expects, plans, anticipates, estimates, potential, or
continue or the negative thereof or other comparable terminology. Although we believe that the expectations reflected in the forward-looking statements contained herein are reasonable, there can be no assurance that such expectations or
any of the forward-looking statements will prove to be correct, and actual results could differ materially from those projected or assumed in the forward-looking statements. Our future financial condition and results of operations, as well as any
forward-looking statements, are subject to inherent risks and uncertainties, including but not limited to the Risk Factors set forth under Part II, Item 1A below, and for the reasons described elsewhere in this report. All forward-looking
statements and reasons why results may differ included in this report are made as of the date hereof, and we assume no obligation to update these forward-looking statements or reasons why actual results might differ.

Overview

We are a biopharmaceutical company focused
on the development and commercialization of new therapeutics for the treatment of short stature and other endocrine disorders. Our predecessor, Tercica Limited, a New Zealand Company, was formed in October 2000. Tercica Medica, Inc. was incorporated
in Delaware in December 2001 and subsequently changed its name to Tercica, Inc. In April 2002, we licensed from Genentech intellectual property to develop, manufacture and commercialize rhIGF-1 for a broad range of indications in the United States,
including short stature and diabetes, but excluding diseases and conditions of the central nervous system. In December 2002, we entered into a development and commercial supply contract for the manufacture of bulk rhIGF-1 drug substance with Cambrex
Bio Science Baltimore, Inc., or Cambrex Baltimore. In July 2003, we signed an international license and collaboration agreement with Genentech obtaining the rights to develop and commercialize rhIGF-1 products outside of the United States for all
indications other than diseases and conditions of the central nervous system. The international license and collaboration agreement provides that we must enter into a written agreement with another company if we desire to commercialize Increlex for the treatment of diabetes outside of the United
States.

Our first commercial product is Increlex, a DNA-derived recombinant human insulin-like growth factor-1, or rhIGF-1. In August 2005, the FDA approved the use and
marketing of long-term Increlex replacement
therapy for the treatment of children with severe primary insulin-like growth factor deficiency, or severe Primary IGFD, or with growth hormone gene deletion who have developed neutralizing antibodies to growth hormone, and granted to Increlex seven years of orphan drug marketing exclusivity for
those two indications. See the section entitled Risks Related to Our Business under Part II, Item 1A below for further details related to our orphan drug marketing exclusivity. In January 2006, we launched Increlex in the United States. In December 2005, we also
submitted a Marketing Authorization Application, or MAA, to the European Medicines Agency, or EMEA, for approval to market Increlex in the European Union for the long-term treatment of growth failure in children with severe Primary IGFD or with growth hormone gene deletion who have
developed neutralizing antibodies to growth hormone. Our current focus is on marketing and selling Increlex for the treatment for severe Primary IGFD and developing Increlex as a replacement therapy for primary IGF-1 deficiency, or Primary IGFD. We define the indication Primary IGFD to mean a child who has both a height
standard deviation score, or Height SDS, and an IGF-1 standard deviation score, or IGF-1 SDS, of less than minus two, and the indication severe Primary IGFD to mean a child who has both a Height SDS and IGF-1 SDS of minus three or less, in each case
in the presence of normal or elevated levels of growth hormone. We are currently conducting two late-stage clinical trials for the use of rhIGF-1 in Primary IGFD.

In October 2005, we entered into a committed equity financing facility, or CEFF, with Kingsbridge Capital Limited, or Kingsbridge, which entitles us to sell and obligates Kingsbridge to purchase a maximum of
approximately 6.0 million newly issued shares of our common stock over a three-year period for cash up to an aggregate of $75.0 million, subject to certain conditions and restrictions. See the discussion below under Committed Equity
Financing Facility for further details on the CEFF. As of June 30, 2006, we had not issued any shares under this facility.

As
of June 30, 2006, we had approximately $66.1 million in cash, cash equivalents and short-term investments. We have funded our operations since inception through the private placement of equity securities and public offerings of our common
stock, including a follow-on public offering of common stock completed on January 27, 2006 in which we raised net cash proceeds of approximately $34.2 million.



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In July 2006, we agreed upon the terms of a strategic collaboration with Ipsen S.A., pursuant to which,
among other things, Ipsen (or its designated affiliate) would purchase newly issued shares of our common stock at a premium to market and we would issue Ipsen convertible notes and a warrant that, together, would enable Ipsen to acquire an ownership
interest in us of up to approximately 40% on a post-transaction, fully-diluted basis. In addition, we would grant to Ipsen exclusive rights to sell Increlex in all regions of the world, except the United States, Japan, Canada, certain Middle Eastern countries and Taiwan, and Ipsen would grant to us
exclusive rights to sell Somatuline® Autogel®, a leading product in the European acromegaly market, in the United States and Canada. The closing of the proposed transaction with Ipsen, which is expected to occur this year, is subject to
approval by our stockholders and the expiration of the Hart-Scott-Rodino waiting period, as well as other customary closing conditions. See the discussion below under Proposed Transaction with Ipsen for further details of the proposed
transaction with Ipsen.

Net Product Sales

Product sales consist of shipments of Increlex to specialty pharmacy distributors. Product sales are recognized when title passes to the customer. Product sales consist of gross sales less provisions for discounts to customers, rebates to government agencies,
product returns and other adjustments. These provisions are provided for in the same period the related product sales are recorded. We began generating revenue from the sale of Increlex in January 2006.

Research and Development Expenses

Research and development expenses consist primarily of costs associated with manufacturing development activities prior to regulatory approval and clinical and regulatory activities. Manufacturing development expenses include costs
associated with our contract manufacturers including technology transfer, pre-approval product manufacturing, process development, validation and qualification activities, analytical development, and compliance-related support, pre-FDA approval
preparations for current good manufacturing practices (cGMP), quality control and assurance activities, as well as personnel and related benefits to manage these activities. Clinical and regulatory activities include the preparation, implementation
and management of our clinical trials and assay development, as well as regulatory compliance, data management and biostatistics. Prior to receiving regulatory approval, we charged all drug supply production costs to research and development. Some
of these drug supply costs incurred subsequent to August 2005 are included in inventory since our product received regulatory approval that month, and the subsequent cost of product sales of these inventories may not be indicative of future costs of
product sales.

Because we licensed non-clinical, clinical and manufacturing data and know-how related to rhIGF-1 from Genentech in 2002,
we did not incur significant development expenses prior to 2002. During 2003, our research and development activities were primarily focused on two projects: the transfer of our rhIGF-1 manufacturing process and the development project for Primary
IGFD. At the end of 2003, we began to manage the development project for severe Primary IGFD as a separate project from the development project for Primary IGFD and completed the technology transfer of our manufacturing process to our contract
manufacturers. Our primary focus in research and development in 2004 was associated with the establishment and validation of our rhIGF-1 manufacturing process at our contract manufacturers and preparations for the anticipated New Drug Application,
or NDA, filing for severe Primary IGFD. During 2005, our research and development activities primarily centered around our NDA filing, process validation, quality control and assurance, and analytical services in preparations for FDA inspections at
our contract manufacturers and development projects for severe Primary IGFD and Primary IGFD. Development projects for severe Primary IGFD and Primary IGFD consist primarily of clinical and regulatory activities, including costs associated with
clinical trials. The FDA approved our NDA for severe Primary IGFD in August 2005.

We expect our project costs for the remainder of 2006 to
be primarily focused on clinical and regulatory activities, our MAA filing, and new product development activities in both severe Primary IGFD and Primary IGFD. Our projects or intended projects may be subject to change from time to time as we
evaluate our research and development priorities and available resources.

Selling, General and Administrative Expenses

Selling, general and administrative expenses consist primarily of payroll and related costs associated with sales and marketing
personnel, executive management, corporate administration, legal fees, commercial planning activities, cost of free goods, facility costs, insurance, information technology, medical education and accounting services. During 2004, we expanded our
corporate staffing and infrastructure and initiated planning for sales and marketing activities. During 2005, we continued to expand our corporate and sales staffing and infrastructure, increased our pre-launch activities and implemented
Section 404



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##### Table of Contents

of the Sarbanes-Oxley Act of 2002. We expect total selling, general and administrative expenses for the remainder of 2006
to remain focused on commercial and administrative activities associated with marketing Increlex for severe Primary IGFD, litigation associated with Insmed, as well as preparations for closing of the transaction with Ipsen and the subsequent launch of Somatuline® Autogel® in
Canada and the United States.

Critical Accounting Policies and the Use of Estimates

Our managements discussion and analysis of our financial condition and results of operations are based on our financial statements which have been
prepared in accordance with accounting principles generally accepted in the United States, or GAAP, for interim financial information. The preparation of our financial statements requires management to make estimates and assumptions that affect the
amounts reported in our financial statements and accompanying notes. Actual results could differ materially from those estimates.

The
items in our financial statements requiring significant estimates and judgments are as follows:

Revenue Recognition

Product sales consist of shipments of Increlex to specialty pharmacy distributors. Product sales are recognized when title passes to the customer, and the customer
assumes the risks and rewards of ownership. This is generally at the time product arrives at the customers location. Product sales consist of gross sales less provisions for discounts to customers, rebates to government agencies, product
returns and other adjustments. These provisions are provided for in the same period the related product sales are recorded. We began generating revenue from the sale of Increlex in January 2006.

Stock-Based Compensation

On January 1, 2006, we adopted Statement of Financial Accounting Standards
No. 123 (revised 2004), Share-Based Payment, or SFAS No. 123R, which requires the measurement and recognition of non-cash compensation expense for all share-based payment awards made to employees and directors including employee
stock options and employee stock purchases related to our 2004 Employee Stock Purchase Plan based on estimated fair values. SFAS No. 123R supersedes our previous accounting under Accounting Principles Board, or APB, Opinion No. 25,
Accounting for Stock Issued to Employees, for periods beginning in fiscal 2006. In March 2005, the Securities and Exchange Commission issued Staff Accounting Bulletin No. 107, or SAB 107, relating to SFAS No. 123R. We have applied
the provisions of SAB 107 in our adoption of SFAS No. 123R.

Prior to the adoption of SFAS No. 123R, we previously accounted for
our stock-based compensation plans under the recognition and measurement provisions of APB Opinion No. 25 and related interpretations, and provided the disclosure-only provisions of SFAS No. 123, Accounting for Stock-Based
Compensation. During the period from February 1, 2003 through January 31, 2004, certain stock options were granted with exercise prices that were below the reassessed fair value of the common stock at the date of grant. Deferred stock
compensation, from inception through January 31, 2004, of $10.9 million was recorded in accordance with APB Opinion No. 25, and was being amortized to expense over the related vesting period of the options. From inception through
December 31, 2005, stock-based compensation expense of $5.7 million was recognized and $2.6 million was reversed as a result of employee terminations. The remaining deferred stock compensation balance of $2.6 million as of December 31,
2005 was reversed on January 1, 2006 upon adoption in accordance with the provisions of SFAS No. 123R.

We adopted SFAS
No. 123R using the modified prospective transition method. Under that transition method, non-cash compensation expense has been recognized beginning in the first quarter of fiscal 2006 and includes the following: (a) compensation expense
related to any share-based payments granted through, but not yet vested as of January 1, 2006, and (b) compensation expense for any share-based payments granted subsequent to January 1, 2006 based on the grant-date fair value
estimated in accordance with the provisions of SFAS No. 123R. We recognize non-cash compensation expense for the fair values of these share-based awards on a straight-line basis over the requisite service period of each of these awards. Because
non-cash stock compensation expense is based on awards ultimately expected to vest, it has been reduced by estimated forfeitures. SFAS No. 123R requires forfeitures to be estimated at the time of grant and revised, if necessary, in subsequent
periods if actual forfeitures differ from those estimates. Our financial statements as of June 30, 2006 and for the three and six months ended June 30, 2006 reflect the impact of SFAS No. 123R. In accordance with the modified
prospective transition method, our financial statements for prior periods have not been restated to reflect, and do not include, the impact of SFAS No. 123R.

As a result of adopting SFAS No. 123R, we recognized stock-based compensation expense of $1.6 million and $2.8 million during the three and six months ended June 30, 2006, respectively, which primarily
affected our reported research and development and selling, general, and administrative expenses. Approximately $548,000 and $1.0 million are included in



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research and development expenses for the three and six months ended June 30, 2006, respectively, and approximately
$1.1 million and $1.8 million are included in selling, general and administrative expenses for the three and six months ended June 30, 2006, respectively. We calculated this expense based on the fair values of the stock-based compensation
awards as estimated using the Black-Scholes model. Use of this model requires us to make assumptions about expected future volatility of our stock price and the expected term of the options that we grant. Calculating stock-based compensation expense
under SFAS No. 123R also requires us to make assumptions about expected future forfeiture rates for our option awards. As of June 30, 2006, total unrecognized compensation expense related to unvested share-based compensation arrangements
previously granted under our various plans was $13.9 million, which we expect to recognize over a weighted-average period of 2.9 years. However, it is difficult to predict the actual amount of share-based compensation expense that we will recognize
in future periods as that expense can be affected by changes in the amount or terms of our share-based compensation awards issued in the future, changes in the assumptions used in our model to value those future awards, changes in our stock price,
and changes in interest rates, among other factors.

For more information on stock-based compensation expense recorded for the three and
six months ended June 30, 2006, please refer to Note 7Stock Based Compensation in the notes to our condensed financial statements.

Inventories

Inventories are stated at the lower of cost or market. Cost is determined using the first-in, first-out
method. The valuation of inventory requires us to estimate potential obsolete or excess inventory. The determination of obsolete or excess inventory requires us to estimate the future demands for Increlex; however, if our current assumptions about future production or inventory levels,
demand or competition were to change or if actual market conditions are less favorable than those we have projected, inventory write-downs may be required that could negatively impact our results of operations.

Clinical Trial Expenses

We
contract with third-party clinical research organizations to perform various clinical trial activities. We recognize research and development expenses for these contracted activities based upon a variety of factors, including actual and estimated
patient enrollment rates, clinical site initiation activities, labor hours and other activity-based factors. We match the recording of expenses in our financial statements to the actual services received from and efforts expended by the related
clinical research organization. Depending on the timing of payments to the service providers, we record prepaid expenses and accruals relating to clinical trials based on our estimate of the degree of completion of the event or events as specified
in each clinical study or trial contract. We monitor each of these factors to the extent possible and adjust estimates accordingly. However such adjustments to date have not been material to our results of operations or financial position.

Results of Operations

Three
Months Ended June 30, 2006 and 2005

Net Product Sales. We began shipment of Increlex to specialty pharmacy distributors in January 2006. Product sales less
product returns and cash discounts were $166,000 for the quarter ended June 30, 2006. There were minimal government rebates to state Medicaid agencies in the second quarter of 2006. As Increlex is generally ordered by our distributors against specific prescriptions, we believe
that our distributors carry minimal levels of inventory.

Cost of Product Sales. Cost of product sales was $557,000, and included
the write-down of inventory totaling $433,000, of which $364,000 was due to a manufacturing lot failure, for the quarter ended June 30, 2006. Cost of product sales represents the cost of production, shipping, distribution and handling costs,
inventory write-downs based on our review of obsolete, excess and expired inventory, and royalties owed to Genentech based on sales of Increlex. Prior to regulatory approval of Increlex in August 2005, drug supply production costs were charged to research and development. Beginning in the fourth quarter of 2005, with the marketing
approval of Increlex by the FDA, we began
capitalizing these production costs to inventory and began to charge cost of product sales in the first quarter of 2006 as these units of Increlex were sold. In addition to these capitalized drug supply production costs, there are also certain variable and fixed shipping, distribution and
handlings costs charged to cost of product sales. Our cost of product sales as a percentage of net product sales may fluctuate over time as the drug supply produced prior to August 2005 is sold, as the mix of the fixed versus variable costs change
over time and the percentage of manufacturing lots are successfully completed.

Research and Development Expenses. Research and
development expenses decreased to $4.6 million for the quarter ended June 30, 2006, from $6.3 million for the same period in 2005. Total research and development expenses decreased $1.7 million in the second quarter of 2006 compared to the
second quarter of 2005 due primarily to lower project costs associated with manufacturing development activities of $2.2 million, partially offset by higher personnel and other costs of $432,000 and a $100,000 payment under our U.S. License and
Collaboration Agreement with Genentech. Our project costs in the quarter ended June 30, 2006 were lower than the same quarter in 2005 primarily due to the completion of our



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manufacturing activities in preparation for our NDA filing which was substantially completed in August 2005. The $4.6
million in expenses during the quarter ended June 30, 2006 were comprised primarily of internal personnel and other costs of $3.1 million, external project costs associated with our clinical and regulatory activities in Primary IGFD and MAA
filing related costs of $1.4 million and a $100,000 payment under our U.S License and Collaboration Agreement with Genentech.

Selling,
General and Administrative Expenses. Selling, general and administrative expenses increased to $10.6 million for the quarter ended June 30, 2006, from $6.5 million for the same period in 2005. The increase of $4.1 million was primarily
attributable to additional expenditures associated with sales and marketing activities of $3.0 million, increased general and administrative personnel costs of $1.4 million, increased free goods expense of $621,000, of which $463,000 was related to
a write-down of inventory due to a manufacturing lot failure, and increased expenses associated with medical education of $202,000, partially offset by decreased expenses primarily associated with litigation of $1.0 million.

Interest expense.There was no interest expense for the quarter ended June 30, 2006.Interest expense was $294,000 for the quarter
ended June 30, 2005. In January 2005, we entered into a loan agreement with Venture Leasing & Lending IV, Inc., or VLL, under which we issued 75,000 shares of our common stock to VLL. The common stock was valued at $720,000 on the date
of issuance, and was amortized over the period of the initial loan commitment, through April 30, 2005, as interest expense. In May 2005, we extended our loan agreement with VLL through December 31, 2005, in connection with which we issued
37,500 shares of our common stock to an affiliate of VLL. The 37,500 shares of common stock were valued at $282,000 on the date of issuance, and were amortized over the extended eight-month commitment period through December 31, 2005, as
interest expense.

Interest and Other Income, net. Interest and other income, net, increased to $889,000 for the quarter ended
June 30, 2006, from $671,000 for the same period in 2005. The increase was due primarily to an increase in interest rates.

Six
Months Ended June 30, 2006 and 2005

Net Product Sales. We began shipment of Increlex to specialty pharmacy distributors in January 2006. Product sales less
product returns and cash discounts were $251,000 for the six months ended June 30, 2006. There were minimal government rebates to state Medicaid agencies in the six months ended June 30, 2006. As Increlex is generally ordered by our distributors against specific prescriptions, we
believe that our distributors carry minimal levels of inventory.

Cost of Product Sales. Cost of product sales were $640,000, and
included the write-down of inventory totaling $442,000, of which $364,000 was due to a manufacturing lot failure, for the six months ended June 30, 2006. Cost of product sales represents the cost of production, shipping, distribution and
handling costs, inventory write-downs based on our review of obsolete, excess and expired inventory, and royalties owed to Genentech based on sales of Increlex. Prior to regulatory approval of Increlex in August 2005, drug supply production costs were charged to research and development. Beginning in the fourth quarter
of 2005, with the marketing approval of Increlex
by the FDA, we began capitalizing these production costs to inventory and began to charge cost of product sales in the first quarter of 2006 as these units of Increlex were sold. In addition to these capitalized drug supply production costs, there are also certain variable and fixed
shipping, distribution and handlings costs charged to cost of product sales. Our cost of product sales as a percentage of net product sales may fluctuate over time as the drug supply produced prior to August 2005 is sold, as the mix of the fixed
versus variable costs change over time and the percentage of manufacturing lots that are successfully completed.

Research and
Development Expenses. Research and development expenses decreased to $9.2 million for the six months ended June 30, 2006, from $11.2 million for the same period in 2005. Total research and development expenses decreased $2.0 million in the
six months ended June 30, 2006 compared to the same period in 2005 due primarily to lower project costs associated with our manufacturing development activities of $3.0 million, partially offset by higher personnel and other costs of $956,000
and a $100,000 payment under our U.S. License and Collaboration Agreement with Genentech. Our project costs in the six months ended June 30, 2006 were lower than the same period in 2005 primarily due to completion of our manufacturing
activities in preparation for our NDA filing which was substantially completed in August 2005. The $9.2 million in expenses during the six months ended June 30, 2006 were comprised of internal personnel and other costs of $6.0 million, external
project costs associated with our clinical and regulatory activities in Primary IGFD and MAA filing related costs of $3.1 million and a $100,000 payment under our U.S. License and Collaboration Agreement with Genentech.

Selling, General and Administrative Expenses. Selling, general and administrative expenses increased to $21.1 million for the six months ended
June 30, 2006, from $10.6 million for the same period in 2005. The increase of $10.5 million was primarily attributable to additional expenditures associated with sales and marketing activities of $5.7 million, increased general and
administrative personnel and other costs of $2.6 million, increased expenses primarily associated with litigation of $1.2 million, increased free goods expense of $741,000, of which $463,000 was related to a write-down of inventory due to a
manufacturing lot failure. and increased expenses associated with medical education of $274,000.



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Interest expense.There was no interest expense for the six months ended June 30, 2006.Interest expense was $793,000 for the six months ended June 30, 2005 due to the issuance of our common stock to VLL. In January 2005, we entered into a loan agreement with Venture Leasing & Lending IV, Inc., or VLL, under which we
issued 75,000 shares of our common stock to VLL. The common stock was valued at $720,000 on the date of issuance, and was amortized over the period of the initial loan commitment, through April 30, 2005, as interest expense. In May 2005, we
extended our loan agreement with VLL through December 31, 2005, in connection with which we issued 37,500 shares of our common stock to an affiliate of VLL. The 37,500 shares of common stock were valued at $282,000 on the date of issuance, and
were amortized over the extended eight-month commitment period through December 31, 2005, as interest expense.

Interest and Other
Income, net. Interest and other income, net, increased to $1.8 million for the six months ended June 30, 2006, from $1.1 million for the same period in 2005. The increase was due to primarily to an increase in interest rates.

Liquidity and Capital Resources

Sources of
Liquidity

As of June 30, 2006, we had an accumulated deficit of $194.7 million, which was primarily comprised of $151.7
million of accumulated net losses and $44.1 million of a non-cash deemed dividend related to the beneficial conversion feature of convertible preferred stock. We have funded our operations and growth from inception through June 30, 2006 with
net cash proceeds of $66.0 million in private equity financings and $135.3 million from our public offerings of common stock.

Committed Equity Financing Facility

Under the terms of the CEFF, Kingsbridge committed to purchase a maximum of
approximately 6.0 million newly issued shares of our common stock over a three-year period beginning in October 2005, for cash up to an aggregate of $75.0 million, subject to certain conditions. We may draw down under the CEFF in tranches of up
to the lesser of $7.0 million or 2% of our market capitalization at the time of the draw down of such tranche, subject to certain conditions. The common stock to be issued for each draw down will be issued and priced over an eight-day pricing period
at discounts ranging from 6% to 10% from the volume weighted average price of our common stock during the pricing period. During the term of the CEFF, Kingsbridge may not short our stock, nor may it enter into any derivative transaction directly
related to our stock. The minimum acceptable purchase price, prior to the application of the appropriate discount for any shares to be sold to Kingsbridge during the eight-day pricing period, is determined by the greater of $3.00 or 90% of our
closing share price on the trading day immediately prior to the commencement of each draw down. In connection with the CEFF, we issued a warrant to Kingsbridge to purchase up to 260,000 shares of our common stock at an exercise price of $13.12 per
share. We may exercise our right to draw down amounts under the CEFF, if and to the extent available, at such times as we have a need for additional capital and when we believe that sales of our common stock under the CEFF provide an appropriate
means of raising capital. However, we are not obligated to sell any of the $75.0 million of common stock available under the CEFF, and there are no minimum commitments or minimum use penalties. During the six months ended June 30, 2006, we did
not draw down any funds under the CEFF and had not issued any shares pursuant to the CEFF as of June 30, 2006.

Proposed
Transaction with Ipsen

On July 18, 2006, we entered into a Stock Purchase and Master Transaction Agreement, or Purchase
Agreement, with Ipsen, S.A. Under the terms of the Purchase Agreement, we have agreed to issue to Ipsen (or its designated affiliate): (i) 12,527,245 shares of our common stock at a premium to market; (ii) a convertible note in the
principal amount of $25.0 million; (iii) a second convertible note in the principal amount of 30.0 million euros; (iv) a third convertible note in the principal amount of $15.0 million; and (v) a warrant to purchase a minimum of
4,948,795 shares of our common stock. Each of the convertible notes would mature five years from the date of issuance and carry a coupon of 2.5% per annum from the date of issuance, compounded quarterly, and would be convertible into shares of
our common stock at an initial conversion price per share equal to $7.41 per share (5.92 per share with respect to the second convertible note). The warrant would be exercisable at any time during the five-year period after the first closing
under the Purchase Agreement and would carry an initial exercise price per share equal to $7.41 per share. At the first closing under the Purchase Agreement, subject to the satisfaction or waiver of the conditions thereto, including the approval by
our stockholders of the required aspects of the transactions contemplated by the Purchase Agreement and the expiration of the waiting period under the Hart-Scott-Rodino Antitrust & Improvements Act of 1976, as amended, we would issue the
12,527,245 shares, the first convertible note and the warrant, and Ipsen would deliver $77.3 million to us for the shares. The Purchase Agreement provides that, simultaneously with the first closing thereunder, we and Ipsen (and/or affiliates
thereof) would also enter into licensing and certain other agreements, including an agreement with respect to certain corporate governance matters and providing Ipsen with the right to nominate a



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certain number of directors for election to our Board of Directors, and we would effect amendments to our charter
documents and would adopt a stockholder rights plan. At the second closing, subject to the satisfaction or waiver of the conditions thereto, we would issue the second convertible note and the third convertible note, and Ipsen would deliver $15.0
million to us. The second convertible note would be issued to Ipsen in lieu of the 30.0 million euros we would be required to pay to Ipsen in connection with FDA approval of Somatuline® Autogel® for the targeted product label, as
described below. Together with the shares we would issue to Ipsen at the first closing under the Purchase Agreement, the issuance of all three convertible notes and the warrant would enable Ipsen to acquire an ownership interest in us of up to
approximately 40% on a post-transaction, fully-diluted basis. A description of the material terms of the Purchase Agreement and the transactions contemplated thereby is included under the caption Item 1.01. Entry into a Material Definitive
Agreement in our Current Report on Form 8-K, filed with the Securities and Exchange Commission on July 24, 2006, and is incorporated by reference herein.

Pursuant to the licensing agreements we would enter into with Ipsen in connection with the first closing under the Purchase Agreement, among other things, we would grant to Ipsen exclusive rights to sell Increlex in all regions of the world, except the United States,
Japan, Canada, certain Middle Eastern countries and Taiwan, and Ipsen would grant us exclusive rights to sell Somatuline® Autogel®, a leading product in the European acromegaly market, in the United States and Canada. Acromegaly is a
hormonal disorder that results when a tumor in the pituitary gland produces excess growth hormone. Further, we and Ipsen would grant to each other product development rights and share the costs for improvements to, or new indications for,
Somatuline® Autogel® and Increlex. In
addition, we and Ipsen would agree to rights of first negotiation for our respective endocrine pipelines. Under the proposed licensing agreement for Increlex, Ipsen would make an upfront cash payment to us of 10.0 million euros and an additional 15.0 million euros
upon approval of the Increlex MAA in the European
Union for the targeted product label. If Increlex
is launched in Ipsens territory, Ipsen would pay royalties to us on a sliding scale from 15% to 25% of net sales, in addition to a supply price of 20% of net sales of Increlex. Under the proposed licensing agreement for Somatuline® Autogel®, we would
make an upfront payment of $25.0 million to Ipsen, which would be financed through the issuance by us of the first convertible note to Ipsen at the first closing under the Purchase Agreement. If Somatuline® Autogel® is approved in the United
States for the targeted product label (and the second closing under the Purchase Agreement is consummated), we would make a milestone payment of 30.0 million euros to Ipsen, which would be financed through the issuance by us of the second
convertible note to Ipsen at the second closing under the Purchase Agreement. Once Somatuline® Autogel® is launched in our territory, we would pay royalties to Ipsen, on a sliding scale from 15% to 25% of net sales, in addition to a supply
price of 20% of net sales of Somatuline® Autogel®.

There can be no assurance that we will receive all or any portion of the
anticipated proceeds of the proposed transaction with Ipsen, nor can there be an assurance that we would achieve the anticipated benefits of the proposed transactions with Ipsen. Further, if issued, we would be required to pay to Ipsen the principal
amounts, including accrued interest, under all three convertible notes if Ipsen elects not to convert these notes into shares of our common stock. For more information on these and other risks and uncertainties related to the proposed transaction
with Ipsen, see the discussion under Item 1A. Risk FactorsRisks Related to the Proposed Transaction with Ipsen.

Cash Flow

Cash, cash equivalents and short-term investments totaled $66.1 million at June 30, 2006, compared to
$58.6 million at December 31, 2005. The increase was primarily due to net proceeds of $34.2 million from the issuance of common stock from our January 2006 follow-on public offering, partially offset by cash used in operating activities of
$26.5 million. The uses of cash in operations, during the six months ended June 30, 2006, were primarily related to sales, marketing and related support personnel and their activities associated with severe Primary IGFD, clinical and regulatory
activities related to severe Primary IGFD and Primary IGFD and other general and administrative expenses as well as litigation related expenses. The increase in cash used in operations of $7.7 million in the six months ended June 30, 2006,
compared to the same period in 2005, was due primarily to increases in sales, marketing and litigation activities. We expect an increase in net cash used in operations for the remainder of 2006, primarily to support the commercial activities
associated with marketing Increlex for severe
Primary IGFD and clinical, regulatory, and new product development activities in severe Primary IGFD and Primary IGFD, as well as preparations for closing of the transaction with Ipsen.

Net cash used in investing activities totaled $2.0 million in the six months ended June 30, 2006, compared to $16.8 million in the same period in
2005. Net cash used in investing activities represented purchases, sales and maturities of investments and purchases of property and equipment. Net purchases of short-term investments were $1.3 million in the six months ended June 30, 2006,
compared to net purchases of short-term investments of $15.4 million for the same period in 2005. The decrease of $14.1 million in net purchases of short-term investments in the six months ended June 30, 2006, compared to the same period in
2005, was primarily due to the timing of maturities, sales and purchases of short-term investments.



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Net cash provided by financing activities for the six months ended June 30, 2006 was $34.5 million,
compared to $51.3 million for the same period in 2005. Net cash provided by financing activities primarily related to net proceeds received from our public offerings of common stock which totaled $34.2 million and $51.1 million in the six months
ended June 30, 2006 and 2005, respectively.

Litigation

On December 20, 2004, we initiated patent infringement proceedings against Avecia Limited and Insmed Incorporated as co-defendants in the High Court
of Justice (Chancery Division Patents Court) in the United Kingdom. There is no date set for this action. On December 23, 2004, we, with Genentech, initiated patent infringement proceedings against Insmed Incorporated in the U.S. District Court
for the Northern District of California. We initiated these proceedings because we believe that Insmed and Avecia are infringing on our patents that cover Insmeds products use and manufacture. The trial date for the proceedings in the
U.S. District Court for the Northern District of California is November 6, 2006. On June 30, 2006, this court issued rulings on several claims construction issues and cross-motions for summary judgment. The court granted us summary
judgment that Insmed infringes claims 1, 2 and 9 of U.S. Patent No. 6,331,414, and granted us summary judgment that certain publications asserted by Insmed against the validity of U.S. Patent No. 5,187,151 do not qualify as prior art and
cannot be used to attack the validity of that patent. In addition, the court denied Insmed summary judgment that Insmed does not infringe any of claims 1 through 4, 9 and 10 of U.S. Patent No. 6,331,414, denied Insmed summary judgment that
claims 1 through 4, 9 and 10 of U.S. Patent No. 6,331,414 are invalid under 35 U.S.C. §101 and §112, denied Insmed summary judgment that Insmed does not infringe claims 1, 4, 5 and 7 of U.S. Patent No. 5,187,151, and granted
Insmed summary judgment that no recovery can be had against it based on any activities conducted by Celtrix Pharmaceuticals, Inc. prior to December 23, 1998. However, on July 14, 2006 Insmed filed a request seeking leave of the court to
file a motion for partial reconsideration of the summary judgment order with respect to infringement of claims 1 and 2 of U.S. Pat. No. 6,331,414.

We cannot predict the outcome of our litigation against Avecia and Insmed in the United Kingdom or the outcome of our litigation against Insmed in the United States. Moreover, we cannot predict the cost of such
litigation, which may require a substantial diversion of our financial assets and other resources and consequently prevent us from allocating sufficient resources to the development of our rhIGF-1 programs, and which may have a material adverse
effect on our business. In addition, if the outcome of our litigation in the United Kingdom is not favorable to us, we are likely to be found liable for the opposing parties costs incurred in connection with the litigation, and we could be
found liable for an award of additional damages to the opposing parties if the court decides that our claims of patent infringement are without sufficient merit or not pursued in good faith. If in our litigation in the United States, the court
decides Insmed prevails, and Insmed establishes by clear and convincing evidence that the case is exceptional (e.g., our claims of patent infringement were not pursued in good faith), we could be liable for an award of the opposing partys
costs and legal fees incurred in connection with the litigation and/or an award of other damages. Any such award or awards to the opposing party or parties could substantially increase our costs and exacerbate the negative impact that an unfavorable
outcome in the case(s) could have on our business. Further, it is not uncommon in cases of this kind for a defendant to assert counterclaims, which could significantly increase our costs, potential liability for damages, and other risks arising from
these lawsuits, and a court could find us liable for any such damages caused by Genentech as well.

Insmed and Avecia have challenged the
validity of European Patent No. 0 571 417 in our litigation in the United Kingdom, and Insmed has challenged the validity of U.S. Patent Nos. 5,187,151, 6,331,414 and 5,258,287 in our litigation in the United States. Even if we voluntarily drop our
claims of patent infringement in our litigation in the United States and/or the United Kingdom, the opposing party or parties may pursue counterclaims for a declaratory judgment of invalidity against the asserted patent or patents in such action(s).
If in our litigation in the United States the court awards a declaratory judgment finding invalid one or more of the claims of U.S. Patent No. 5,187,151, one or more of the claims of U.S. Patent No. 5,258,287, and/or one or more of the
claims of U.S. Patent No. 6,331,414, and if the courts finding of invalidity in such declaratory judgment is upheld in whole or in part on appeal or if no appeal is taken, we would be unable to exclude others from using the affected claim
or claims in the United States, which may decrease our ability to generate significant revenue from our rhIGF-1 programs and/or render any further development and commercialization of rhIGF-1 commercially infeasible for us. If in our litigation in
the United Kingdom, the court awards a declaratory judgment finding invalid one or more of the claims of European Patent No. 0 571 417, and if the courts finding of invalidity in such declaratory judgment is upheld in whole or in part on
appeal or if no appeal is taken, we would be unable to exclude others from using the affected claim or claims in the United Kingdom, and any such finding of invalidity may have a similar adverse impact on the enforceability of the affected claim or
claims in one or more of the other European countries in which European Patent No. 0 571 417 would otherwise be in force, which may decrease our ability to generate significant revenue from our rhIGF-1 programs and/or render any further development
and commercialization of rhIGF-1 commercially infeasible for us.



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In December 2005, we filed a complaint against Insmed for False Advertising and Unfair Competition, Case
No. C-05-5027 SBA, in the U.S. District Court for the Northern District of California. The complaint alleged that Insmed made false, misleading and deceptive statements about Increlex and its product. We were seeking monetary and injunctive relief.
On June 9, 2006 the Court granted Insmeds motion to dismiss the case. On June 12, 2006, we filed a complaint against Insmed for False Advertising, Unfair Competition and Intentional Interference with Prospective Business
Relations, Case No. 3:06cv403, in the U.S. District Court for the Eastern District of Virginia. The complaint alleged that Insmed made false, misleading and deceptive statements about Increlex and its product and intentionally interfered with
our business relationships. We are seeking monetary and injunctive relief. On June 23, 2006, we filed our First Amended Complaint. On July 27, 2006, Insmed filed a motion to dismiss the case. The Court has not yet set a hearing date for
this motion.

Contractual Obligations and Commercial Commitments

Under our agreement with Cambrex Baltimore, we have a non-cancelable obligation to reimburse Cambrex Baltimore on a time and materials and per batch basis
in connection with the commercial production of Increlex. We estimate that our total purchase commitment to Cambrex Baltimore is approximately $6.7 million through December 31, 2006. Further, as we reach certain milestones, we will be committed
to make certain future purchases.

Our operating lease commitments disclosed in Item 7 of our Annual Report on Form 10-K for the year
ended December 31, 2005, as amended, have not changed significantly.

Operating Capital and Capital Expenditure Requirements

We obtained approval for the long-term treatment of growth failure in children with severe Primary IGFD or with growth hormone gene
deletion who have developed neutralizing antibodies to growth hormone from the FDA in August 2005, and we are marketing Increlex for those indications. In addition, we submitted an MAA to the EMEA seeking approval to market Increlex in
the European Union for a similar indication. We are also conducting two late-stage clinical trials for the use of rhIGF-1 in Primary IGFD as well as other clinical activities. Our projects may be subject to change from time-to-time as we evaluate
our research and development priorities and available resources. These projects may also yield varying results that could delay, limit or change the timing of a projects advancement through various stages of product development and could
significantly impact the costs to be incurred in bringing a project to completion. As a result, the costs to complete such projects, as well as the timing of net cash outflows, are not reasonably estimable.

We plan to make significant expenditures to support our marketing, sales, clinical trial, regulatory, and product development activities. We expect to
focus on commercial launch activities for severe Primary IGFD, and we expect to continue to expand our development projects for severe Primary IGFD and Primary IGFD. We also expect significant legal and other expenditures for our ongoing litigation
and preparing for closing of the transaction with Ipsen and the subsequent launch of Somatuline® Autogel® in Canada and the United States.

We believe that our cash, cash equivalents and short-term investments as of June 30, 2006 of $66.1 million, together with the funds available under the CEFF (not including funds we would receive from our collaboration with Ipsen, pending
the closing of the transaction), will be sufficient to meet our projected operating and capital expenditure requirements through at least the end of 2007 based on our current business plan. If the proposed transaction with Ipsen is consummated, we
will likely not be able to draw down all of the funds available under the CEFF. In addition, if the proposed transaction with Ipsen is consummated, we believe that our cash, cash equivalents and short-term investments as of June 30, 2006, together
with the funds we would potentially receive from Ipsen and not including our drawing down of any funds from the CEFF, would be sufficient to meet our projected operating and capital expenditure requirements through the end of 2009. However, our
future capital needs and the adequacy of our available funds will depend on many factors, including:



| |  |  | our ability to market and sell sufficient quantities of Increlex at the anticipated level;
| | - |  | -------------------------------------------------------------------------------------------



| |  |  | the commercial status of the Increlex bulk drug manufacturing operations at Cambrex Baltimore, including the success of our cGMP production activities;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the success of Increlex final drug product manufacturing;
| | - |  | ----------------------------------------------------------



| |  |  | the costs, timing and scope of additional regulatory approvals for Increlex;
| | - |  | -----------------------------------------------------------------------------



| |  |  | the closing of the proposed transaction with Ipsen, and, assuming such closing:
| | - |  | -------------------------------------------------------------------------------



| |  |  | our ability to market and sell sufficient quantities of Somatuline® Autogel® at the anticipated level;
| | - |  | ------------------------------------------------------------------------------------------------------



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| |  |  | Ipsenss ability to supply Somatuline® Autogel® in sufficient quantities;
| | - |  | -------------------------------------------------------------------------



| |  |  | the cost, timing and scope of additional regulatory approvals for Somatuline® Autogel®; and
| | - |  | -------------------------------------------------------------------------------------------



| |  |  | Ipsens ability to market and sell sufficient quantities of Increlex in the licensed territories at the anticipated level;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------



| |  |  | the status of competing products;
| | - |  | ---------------------------------



| |  |  | the rate of progress and cost of our future clinical trials and other research and development activities; and
| | - |  | --------------------------------------------------------------------------------------------------------------



| |  |  | the pace of expansion of administrative and legal expenses.
| | - |  | -----------------------------------------------------------

We expect capital outlays and operating expenditures to increase over the next several years as we expand our operations. We expect that we may require and attempt to raise additional funds through equity or debt financings, collaborative
arrangements with corporate partners or from other sources, including the CEFF. However, there is no assurance that additional funding will be available to finance our operations when needed or on acceptable terms. Additional funding may also result
in dilution to our stockholders.

Due to the significant risks and uncertainties inherent in the manufacturing, clinical development and
regulatory approval processes, the costs to complete our projects through product commercialization are not accurately predictable. Results from regulatory review, manufacturing operations and clinical trials may not be favorable. Further, data from
clinical trials is subject to varying interpretation, and may be deemed insufficient by the regulatory bodies reviewing applications for marketing approvals. As such, our development projects are subject to risks, uncertainties and changes that may
significantly impact cost projections and timelines. As a result, our capital requirements may increase in future periods.



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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Our market risk disclosures set forth
in Item 7A of our Annual Report on Form 10-K for the year ended December 31, 2005, as amended, have not changed significantly.

ITEM 4. CONTROLS AND PROCEDURES.

Evaluation of Disclosure Controls and Procedures

Based on their evaluation as of June 30, 2006, our Chief Executive Officer and Chief Financial Officer, with the participation
of management, have concluded that our disclosure controls and procedures (as defined in Rules 13a15(e) and 15d15(e) of the Securities Exchange Act of 1934) are effective to ensure that the information required to be disclosed by us in
the reports that we file or submit under the Securities and Exchange Act of 1934 is recorded, processed, summarized and reported within the time periods specified in Securities and Exchange Commission rules and forms.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting during the quarter ended June 30, 2006 that have materially affected, or are reasonably likely to materially affect, our internal control
over financial reporting.

Limitations on the Effectiveness of Controls

Our disclosure controls and procedures provide our Chief Executive Officer and Chief Financial Officer reasonable assurances that our disclosure controls
and procedures will achieve their objectives. However, company management, including our Chief Executive Officer and Chief Financial Officer, does not expect that our disclosure controls and procedures or our internal control over financial
reporting can or will prevent all human error. A control system, no matter how well designed and implemented, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Furthermore, the design of a
control system must reflect the fact that there are internal resource constraints, and the benefit of controls must be weighed relative to their corresponding costs. Because of the limitations in all control systems, no evaluation of controls can
provide complete assurance that all control issues and instances of error, if any, within our company are detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur due
to human error or mistake. Additionally, controls, no matter how well designed, could be circumvented by the individual acts of specific persons within the organization. The design of any system of controls is also based in part upon certain
assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated objectives under all potential future conditions.



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Part II  Other Information

ITEM 1. LEGAL PROCEEDINGS

On December 20, 2004, we initiated patent infringement proceedings against
Avecia Limited and Insmed Incorporated as co-defendants in the High Court of Justice (Chancery Division Patents Court) in the United Kingdom. On December 23, 2004, we, with Genentech, initiated patent infringement proceedings against Insmed
Incorporated in the U.S. District Court for the Northern District of California. We initiated these proceedings because we believe that Insmed and Avecia are infringing and/or have infringed on our patents that cover Insmeds products use
and manufacture. Please refer to our disclosures under Part I, Item 3 of our Annual Report on Form 10-K for the year ended December 31, 2005, filed with the SEC on March 16, 2006, as amended, for more information regarding our patent
infringement litigation against Avecia and Insmed in the United Kingdom and our patent infringement litigation against Insmed in the United States. There were no material developments in our patent infringement litigation against Avecia and Insmed
in the United Kingdom during the six months ended June 30, 2006. On June 30, 2006, the court issued rulings on several claims construction issues and cross-motions for summary judgment in our patent infringement litigation against Insmed
in the United States. The court granted us summary judgment that Insmed infringes claims 1, 2 and 9 of U.S. Patent No. 6,331,414, and granted us summary judgment that certain publications asserted by Insmed against the validity of U.S. Patent
No. 5,187,151 do not qualify as prior art and cannot be used to attack the validity of that patent. In addition, the court denied Insmed summary judgment that Insmed does not infringe any of claims 1 through 4, 9 and 10 of U.S. Patent
No. 6,331,414, denied Insmed summary judgment that claims 1 through 4, 9 and 10 of U.S. Patent No. 6,331,414 are invalid under 35 U.S.C. §101 and §112, denied Insmed summary judgment that Insmed does not infringe claims 1, 4, 5
and 7 of U.S. Patent No. 5,187,151, and granted Insmed summary judgment that no recovery can be had against it based on any activities conducted by Celtrix Pharmaceuticals, Inc. prior to December 23, 1998. Apart from the rulings on claims
construction issues and cross-motions for summary judgment issued by the court on June 30, 2006, there were no material developments in our patent infringement litigation against Insmed in the United States during the six months ended
June 30, 2006. Subsequent to the six months ended June 30, 2006, on July 14, 2006 Insmed filed a request seeking leave of the court to file a motion for partial reconsideration of the summary judgment order with respect to
infringement of claims 1 and 2 of U.S. Pat. No. 6,331,414.

We cannot predict the outcome of our litigation against Avecia and Insmed
in the United Kingdom or the outcome of our litigation against Insmed in the United States. Moreover, we cannot predict the cost of such litigation, which has required and will continue to require a substantial diversion of our financial assets and
other resources, and which may have a material adverse effect on our business. In addition, if the outcome of our litigation in the United Kingdom is not favorable to us, we are likely to be found liable for the opposing parties costs incurred
in connection with the litigation, and we could be found liable for an award of additional damages to the opposing parties if the court decides that our claims of patent infringement are without sufficient merit or not pursued in good faith. If in
our litigation in the United States, the court decides that a defendant prevails, and the defendant establishes by clear and convincing evidence that the case is exceptional (e.g., our claims of patent infringement were not pursued in good faith),
we could be liable for an award of the opposing partys costs and legal fees incurred in connection with the litigation and/or an award of other damages. Any such award or awards to the opposing parties could substantially increase our costs
and exacerbate the negative impact that an unfavorable outcome in the case(s) could have on our business. Further, it is not uncommon in cases of this kind for a defendant to assert counterclaims, which could significantly increase our costs,
potential liability for damages, and other risks arising from these lawsuits, and a court could find us liable for any such damages caused by Genentech as well.

Insmed and Avecia have challenged the validity of European Patent No. 0 571 417 in our litigation in the United Kingdom, and Insmed has challenged the validity of U.S. Patent Nos. 5,187,151, 6,331,414 and 5,258,287 in
our litigation in the United States. Even if we voluntarily drop our claims of patent infringement in our litigation in the United States and/or the United Kingdom, the opposing party or parties may pursue counterclaims for a declaratory judgment of
invalidity against the asserted patent or patents in such action(s). If in our litigation in the United States the court awards a declaratory judgment finding invalid one or more of the claims of U.S. Patent No. 5,187,151, one or more of the
claims of U.S. Patent No. 5,258,287, and/or one or more of the claims of U.S. Patent No. 6,331,414, and if the courts finding of invalidity in such declaratory judgment is upheld in whole or in part on appeal or if no appeal is
taken, we would be unable to exclude others from using the affected claim or claims in the United States, which may decrease our ability to generate significant revenue from our rhIGF-1 programs and/or render any further development and
commercialization of rhIGF-1 commercially infeasible for us. If in our litigation in the United Kingdom, the court awards a declaratory judgment finding invalid one or more of the claims of European Patent No. 0 571 417, and if the courts
finding of invalidity in such declaratory judgment is upheld in whole or in part on appeal or if no appeal is taken, we would be unable to exclude others from using the affected claim or claims in the United Kingdom, and any such finding of
invalidity may have a similar adverse impact on the enforceability of the affected claim or claims in one or more of the other European countries in which European Patent No. 0 571 417 would otherwise be in force, which may decrease our ability to
generate significant revenue from our rhIGF-1 programs and/or render any further development and commercialization of rhIGF-1 commercially infeasible for us.



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In December 2005, we filed a complaint against Insmed for False Advertising and Unfair Competition, Case
No. C-05-5027 SBA, in the U.S. District Court for the Northern District of California. The complaint alleged that Insmed made false, misleading and deceptive statements about Increlex and its product. We were seeking monetary and injunctive relief.
On June 9, 2006 the Court granted Insmeds motion to dismiss the case. On June 12, 2006, we filed a complaint against Insmed for False Advertising, Unfair Competition and Intentional Interference with Prospective Business
Relations, Case No. 3:06cv403, in the U.S. District Court for the Eastern District of Virginia. The complaint alleged that Insmed made false, misleading and deceptive statements about Increlex and its product and intentionally interfered with
our business relationships. We are seeking monetary and injunctive relief. On June 23, 2006, we filed our First Amended Complaint. On July 27, 2006, Insmed filed a motion to dismiss the case. The Court has not yet set a hearing date for
this motion.



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ITEM 1A. RISK FACTORS.

We have identified the following additional risks and uncertainties that may
have a material adverse effect on our business, financial condition or results of operations. Investors should carefully consider the risks described below before making an investment decision. The risks described below are not the only ones we
face. Additional risks not presently known to us or that we currently believe are immaterial may also significantly impair our business operations. Our business could be harmed by any of these risks. The trading price of our common stock could
decline due to any of these risks, and investors may lose all or part of their investment.

We have marked with an asterisk
(*) those risks described below that reflect substantive changes from the risks described under Item 1A. Risk Factors included in our Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 16,
2006.

Risks Related to Our Business

We are a development stage company with a limited operating history and may not be able to successfully market and sell any products, generate significant revenues or attain profitability.*

We are a development stage company focused on the development and commercialization of Increlex for the treatment of short stature and other endocrine disorders. From our inception
in October 2000 through June 30, 2006, we have an accumulated deficit of $194.7 million. We had revenues of $251,000 and incurred a net loss of $28.9 million during the six months ended June 30, 2006. We may not be able to generate
significant revenues from operations and may not be able to attain profitability. We expect to incur substantial net losses, in the aggregate and on a per share basis, for the foreseeable future as we attempt to develop, market and sell
Increlex for severe Primary IGFD and Primary
IGFD. We are unable to predict the extent of these future net losses, or when we may attain profitability, if at all. These net losses, among other things, have had and will continue to have an adverse effect on our stockholders equity and net
current assets.

If the proposed transaction with Ipsen is not consummated, we anticipate that for the foreseeable future our ability to
generate revenues and achieve profitability will be solely dependent on the successful commercialization of Increlex for the treatment of severe Primary IGFD and Primary IGFD. There is no assurance that we will be able to obtain or maintain governmental regulatory
approvals to market Increlex in the United States
or rest of the world for either or both of these indications or any other indication. If we are unable to generate significant revenue from Increlex or attain profitability, we will not be able to sustain our operations.

If there are fewer children with severe Primary IGFD or Primary IGFD than we estimate, we may not generate sufficient revenues to continue
development of other products or to continue operations, or we may not be able to complete our clinical trials.*

If there are fewer
children with severe Primary IGFD or Primary IGFD than we estimate, we may not generate sufficient revenues to continue development of other indications or products and may need to cease operations. We estimate that the number of children in the
United States with short stature is approximately one million, of which approximately 380,000 are referred to pediatric endocrinologists for evaluation. We believe that approximately 30,000 of these children have Primary IGFD, of which approximately
6,000 have severe Primary IGFD. Our estimate of the size of the patient population is based on published studies as well as internal data, including our interpretation of a study conducted as part of Genentechs National Cooperative Growth
Study program. This study reported results of the evaluation of the hormonal basis of short stature in approximately 6,450 children referred to pediatric endocrinologists over a four-year period. We believe that the aggregate numbers of children in
Western Europe with Primary IGFD and severe Primary IGFD are substantially equivalent to the numbers in the United States. If the results of Genentechs study or our interpretation and extrapolation of data from the study do not accurately
reflect the number of children with Primary IGFD or severe Primary IGFD, our assessment of the market may be incorrect, making it difficult or impossible for us to meet our revenue goals or to enroll a sufficient number of patients in our clinical
trials on a timely basis, or at all.

Increlex may fail to achieve market acceptance, which could harm our business.*

Prior to our January 2006 commercial launch of Increlex in the United States for the treatment of severe Primary IGFD, rhIGF-1 had never been commercialized in the United States or Europe for any
indication. Even though the FDA has approved Increlex for sale in the United States, physicians may choose not to prescribe it, and third-party payers may choose not to pay for it, in which event we may be unable to generate significant revenue or become profitable.

Acceptance of Increlex will depend on a number of factors including:



| |  |  | acceptance of Increlex by physicians and patients as a safe and effective treatment;
| | - |  | -------------------------------------------------------------------------------------



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| |  |  | reimbursement adoption;
| | - |  | -----------------------



| |  |  | product price;
| | - |  | --------------



| |  |  | the effectiveness of our sales and marketing efforts;
| | - |  | -----------------------------------------------------



| |  |  | storage requirements and ease of administration;
| | - |  | ------------------------------------------------



| |  |  | dosing regimen;
| | - |  | ---------------



| |  |  | safety and efficacy;
| | - |  | --------------------



| |  |  | prevalence and severity of side effects; and
| | - |  | --------------------------------------------



| |  |  | competitive products.
| | - |  | ---------------------

Reimbursement for
Increlex may be slow, not available at the levels
we expect, or not available at all, resulting in our expected revenues being delayed or substantially reduced.*

Market acceptance,
our sales of Increlex and our profitability will
depend on reimbursement policies and health care reform measures. The levels at which government authorities and third-party payers, such as private health insurers and health maintenance organizations, reimburse the price patients pay for
Increlex, and the timing of reimbursement
decisions by these payers, will affect the commercialization of Increlex. We believe that Increlex will be reimbursed to a similar extent that growth hormone therapy is reimbursed for growth hormone deficiency. However, if our assumptions regarding the timing of reimbursement decisions and level of reimbursement, or
regarding the age, dosage or price per patient for Increlex are incorrect, our expected revenues may be delayed or substantially reduced. Since Increlex is approved by the FDA for severe Primary IGFD, only prescriptions for that indication may be reimbursable. Also, we cannot be sure that the formulary
status that Increlex ultimately receives by
payers will not limit the ability of patients to afford Increlex and therefore reduce the demand for, or the price of, Increlex. If reimbursement is not available or is available only to limited levels, we may not be able to market and sell Increlex and our revenues may be delayed or substantially reduced.

We believe that the annual wholesale acquisition cost of Increlex therapy for the treatment of severe Primary IGFD for a 24 kilogram child is approximately $23,000 per year. The actual
cost per year per patient for Increlex will
depend on the weight of the child, the treatment dose prescribed and compliance. In addition, it is possible that the children receiving Increlex therapy during the first few years of our launch are younger and/or smaller than those children receiving the drug in ensuing years, and the price per
patient could be less than in subsequent years. If our assumptions regarding the revenue per patient of Increlex therapy for the treatment of severe Primary IGFD and Primary IGFD are incorrect, our expected revenues and the market opportunity for Increlex therapy for the treatment of severe Primary IGFD and Primary IGFD may be substantially
reduced.

In recent years, officials have made numerous proposals to change the health care system in the United States. These proposals
include measures that would limit or prohibit payments for certain medical treatments or subject the pricing of drugs to government control. In addition, in many foreign countries, particularly the countries of the European Union, the pricing of
prescription drugs is subject to government control. If our product becomes subject to government legislation that limits or prohibits payment for Increlex, or that subjects the price of our product to governmental control, we may not be able to generate revenues, attain profitability or market
and sell our product. Because these initiatives are subject to substantial political debate, which we cannot predict, the trading price of biotechnology stocks, including ours, may become more volatile as this debate proceeds.

As a result of legislative proposals and the trend towards managed health care in the United States, third-party payers are increasingly attempting to
contain health care costs by limiting both coverage and the level of reimbursement of new drugs. They may also refuse to provide any coverage of uses of approved products for medical indications other than those for which the FDA has granted market
approvals, or require patients to pay co-insurance for Increlex. As a result, significant uncertainty exists as to whether and how much third-party payers will reimburse patients for their use of newly approved drugs, which, in turn, could put pressure on the pricing of drugs
and/or the adoption of new products based on reimbursement policies.

We face significant competition from large pharmaceutical,
biotechnology and other companies that could harm our business.*

The biotechnology industry is intensely competitive and
characterized by rapid technological progress. In each of our potential product areas, we face significant competition from large pharmaceutical, biotechnology and other companies. Most of these companies have substantially greater capital
resources, research and development staffs, facilities and experience at conducting clinical trials and obtaining regulatory approvals. In addition, many of these companies have greater experience, expertise and resources in developing and
commercializing products.



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We cannot predict the relative competitive position of Increlex. However, we expect that the following factors, among others, will determine our
ability to compete effectively:



| |  |  | acceptance of Increlex by physicians and patients as a safe and effective treatment;
| | - |  | -------------------------------------------------------------------------------------



| |  |  | reimbursement adoption;
| | - |  | -----------------------



| |  |  | product price;
| | - |  | --------------



| |  |  | manufacturing costs;
| | - |  | --------------------



| |  |  | the effectiveness of our sales and marketing efforts;
| | - |  | -----------------------------------------------------



| |  |  | storage requirements and ease of administration;
| | - |  | ------------------------------------------------



| |  |  | dosing regimen;
| | - |  | ---------------



| |  |  | safety and efficacy;
| | - |  | --------------------



| |  |  | prevalence and severity of side effects; and
| | - |  | --------------------------------------------



| |  |  | competitive products.
| | - |  | ---------------------

We believe that many of our
competitors spend significantly more on research and development-related activities than we do. Our competitors may discover new treatments, drugs or therapies or develop existing technologies to compete with Increlex. Our commercial opportunities will be reduced or eliminated if these
competing products are more effective, have fewer or less severe side effects, are more convenient or are less expensive than Increlex.

Insmed Incorporateds combination
product was launched and competes directly with Increlex for the treatment of patients with severe Primary IGFD. Insmeds combination product was approved by the FDA for the treatment of patients with severe Primary IGFD or with growth hormone gene deletion who have
developed neutralizing antibodies to growth hormone. Insmed has also announced that its application to market its combination product in the European Union has been validated and that they could therefore receive a marketing approval in 2007.

Growth hormone products will likely compete with Increlex for the treatment of patients with Primary IGFD if Increlex is also approved for that indication. The major suppliers of commercially available
growth hormone products in the United States are Genentech, Eli Lilly and Company, Teva Pharmaceutical Industries Ltd., Novo Nordisk A/S, Pfizer Inc and Serono S.A. Investigators from a Novo Nordisk clinical trial presented data that demonstrated
growth hormone was effective in a population that included children with Primary IGFD. In addition, biosimilar growth hormone products, including Omnitrope marketed by Sandoz, a division of the Novartis group, have been or may be approved in the
United States and become competitors. In addition, children with Primary IGFD may be diagnosed as having idiopathic short stature, or ISS. Eli Lilly and Company and Genentech have received FDA approval for their respective growth hormone products
for the treatment of children with ISS. Accordingly, we expect that growth hormone products will compete directly with Increlex for the treatment of children with Primary IGFD.

In addition, we are aware that Chiron Corporation has developed a process to manufacture rhIGF-1 using yeast expression and has intellectual property with respect to that process. We use bacterial expression, which differs from yeast
expression, to manufacture Increlex.

We believe that Bristol-Meyers Squibb Company, Genentech, Merck & Co., Inc., Novo Nordisk and Pfizer Inc have conducted research and
development of orally available small molecules that cause the release of growth hormone, known as growth hormone secretagogues. We believe that Sapphire Therapeutics has licensed certain rights to Novo Nordisks growth hormone secretagogues
and is actively developing one of these compounds for use in cancer cachexia, a wasting disorder affecting some cancer patients.

Many
companies are seeking to develop products and therapies for the treatment of diabetes. These competitors include multinational pharmaceutical companies, specialized biotechnology firms, and universities and other research institutions. Insmed has
also conducted clinical trials using a product that contains rhIGF-1 for the treatment of diabetes. It is possible that there are other products currently in development or that exist on the market that may compete directly with Increlex.



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If we do not receive additional regulatory marketing approvals, our business will be harmed.*

We are currently developing Increlex for the treatment of Primary IGFD. The FDA has substantial discretion in the approval process and may decide that the data from our clinical
trials is insufficient to allow approval of Increlex for Primary IGFD. If we do not receive regulatory marketing approval in the United States for Primary IGFD, our business will be harmed. We will also need to file applications with regulatory authorities in foreign
countries to market Increlex for Primary IGFD in
foreign countries. Although we have submitted a marketing authorization application in Europe for severe Primary IGFD, there is no assurance that we will receive marketing approval in Europe for either severe Primary IGFD or Primary IGFD. If we fail
to obtain European marketing approval for Increlex, the geographic market for Increlex would be limited. If such approvals are delayed, it would postpone our ability to generate revenues in Europe. In addition, if the proposed transaction with Ipsen is consummated and the FDA does not approve
Somatuline® Autogel® for the label that we anticipate, our ability to generate revenues would be
adversely affected, and our business would be harmed.

Our inability to enter into commercial agreements on commercially reasonable
terms with single-source manufacturers to fill-finish our approved product could adversely affect our commercial supply and ability to grow revenues.*

We currently source all of our fill-finish manufacturing and portions of release testing through a single-source third-party supplier. This supplier is the only FDA-approved manufacturer currently available to us, and
could only be replaced by qualification of a new site for the same operations. We are currently negotiating a short-term commercial agreement with this fill-finish manufacturer, which has agreed to provide commercial product under an existing
agreement. However, if we are unable to enter into such a short-term commercial agreement that has sufficient longevity with this single-source third-party supplier, we may be unable to fill-finish our commercial product until we move our process to
another fill-finish manufacturer. It will take a significant amount of time and expense to arrange for an alternative manufacturer. Even if we enter into such a short-term agreement that has sufficient longevity with this manufacturer, we plan to
engage another manufacturer for long-term fill-finish manufacturing. For us to change to another commercial fill-finish manufacturer, such manufacturers facilities and processes, prior to our use, will need to undergo pre-approval and/or cGMP
compliance inspections. In addition, we would need to transfer and validate the processes and certain analytical methods necessary for the production and testing of rhIGF-1 to this new manufacturer. A delay in such a transfer may also result in a
shortage of our commercial product and a loss of revenues.

If our contract manufacturers facilities and operations do not
maintain satisfactory cGMP compliance, we may be unable to market and sell Increlex.

The facilities used by and operations of our contract manufacturers to manufacture and
test Increlex must undergo continuing inspections
by the FDA for compliance with cGMP regulations in order to maintain our Increlex approval for the treatment of severe Primary IGFD. As an example, Cambrex Bio Science Baltimore, Inc. is our sole provider of bulk rhIGF-1. We have no alternative manufacturing facilities or plans for
additional facilities at this time. We do not know if the Cambrex Baltimore facilities or their operations required for the commercial manufacture of Increlex will continue to receive satisfactory cGMP inspections. In the event these facilities or operations do not continue to
receive satisfactory cGMP inspections for the manufacture of our product, or for the operation of their facilities in general, we may need to invest in significant compliance improvement programs, fund additional modifications to our manufacturing
processes, conduct additional validation studies, or find alternative manufacturing facilities, any of which would result in significant cost to us as well as result in a delay or prevention of commercialization, and may result in our failure to
maintain approval. In addition, Cambrex Baltimore, and any alternative contract manufacturer we may utilize, will be subject to ongoing periodic inspection by the FDA and corresponding state and foreign agencies for compliance with cGMP regulations
and similar foreign standards. We do not have direct control over our contract manufacturers compliance with these regulations and standards. Any of these factors could delay or suspend clinical trials, regulatory submissions or regulatory
approvals, entail higher costs and result in our being unable to effectively market and sell Increlex or maintain Increlex in the marketplace, which would adversely affect our ability to generate revenues.

We rely
solely on single-source third parties in the manufacture, testing, storage and distribution of Increlex.*

We source all of our Increlex fill-finish manufacturing and testing and final product storage and distribution
operations, as well as all of our bulk manufacturing, testing, and shipping operations, through single-source third-party suppliers and contractors. Single-source suppliers are the only approved suppliers currently available to us, and could only be
replaced by qualification of new sites for the same operations.

If our contract facilities, contractors or suppliers become unavailable to
us for any reason, including as a result of the failure to comply with cGMP regulations, manufacturing problems or other operational failures, such as equipment failures or unplanned facility shutdowns required to comply with cGMP, damage from any
event, including fire, flood, earthquake or



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terrorism, business restructuring or insolvency, or if they fail to perform under our agreements with them, such as
failing to deliver commercial quantities of bulk drug substance or finished product on a timely basis and at commercially reasonable prices, we may be delayed in manufacturing Increlex or may be unable to maintain validation of Increlex. This could delay or prevent the supply of commercial and clinical product,
or delay or otherwise adversely affect revenues. If the damage to any of these facilities is extensive, or, for any reason, they do not operate in compliance with cGMP or are unable or refuse to perform under our licenses and/or agreements, we will
need to find alternative facilities. The number of contract manufacturers with the expertise and facilities to manufacture rhIGF-1 bulk drug substance on a commercial scale in accordance with cGMP regulations is extremely limited, and it would take
a significant amount of time and expense to arrange for alternative manufacturers. If we need to change to other commercial manufacturers, these manufacturers facilities and processes, prior to our use, would likely have to undergo
pre-approval and/or cGMP compliance inspections. In addition, we would need to transfer and validate the processes and analytical methods necessary for the production and testing of rhIGF-1 to these new manufacturers.

We rely in certain cases on single-source and sole-source materials suppliers to manufacture Increlex.

Certain specific components and raw materials used to manufacture Increlex at our third-party manufacturers are obtained and made available through either single-source or sole-source suppliers. Single-source suppliers are the only approved suppliers currently
available to us, and could only be supplemented by qualification of new sources for the material required. Sole-source suppliers are the only source of supply available to us, and could only be replaced through qualification of an alternate material
after demonstrating suitability. Supply interruption of these materials could result in a significant delay to our manufacturing schedules and ability to supply product, and would likely be required to undergo lengthy regulatory approval procedures
prior to product distribution. Limits or termination of supply of these materials could significantly impact our ability to manufacture Increlex, cause significant supply delays while we qualified, at significant expense, new suppliers or new materials, and would consequently cause harm to our
business.

Difficulties or delays in product manufacturing due to advance scheduling requirements, capacity constraints and/or
manufacturing lot failures at our third-party manufacturers could harm our operating results and financial performance.*

The
manufacture of Increlex requires successful
coordination between us and all of our suppliers, contractors, service-providers, and manufacturers. Coordination failures with these different elements of our supply chain could require us to delay shipments and/or impair our ability to supply
product. Furthermore, uncertainties in estimating future demand for new products such as Increlex may result in manufacture of surplus inventory requiring us to record charges for any expired, unused product, or may result in inadequate manufacturing of product inventory, causing
delays to shipments or no shipments at all. Additionally, our reliance on third-party manufacturing requires long lead times from order to delivery of product, and may be hampered by available capacity at those manufacturers, making our ability to
supply product supplies in excess of our forecast extremely difficult. As a consequence, we may have inadequate capacity to meet unexpected demand, which could negatively affect our operating results. Further, our operating results and financial
performance may suffer if we experience more than anticipated manufacturing lot failures.

Claims and concerns may arise regarding
the safety and efficacy of Increlex, which could
require us to perform additional clinical trials, could slow penetration into the marketplace, or cause reduced sales or product withdrawal after introduction.*

Increlex was
approved in the United States for the treatment of severe Primary IGFD based on long-term and extensive studies and clinical trials conducted to demonstrate product safety and efficacy. Discovery of previously unknown problems with the raw
materials, product or manufacturing processes, such as loss of sterility, contamination, new data suggesting an unacceptable safety risk or previously unidentified side effects for the product, could result in a voluntary or mandated withdrawal of
the product from the marketplace, either temporarily or permanently. Studies may result in data or evidence suggesting another product is safer, better tolerated, or more efficacious than Increlex, which could lead to reduced sales. Additionally, discovery of unknown problems with
our product or manufacturing processes for our product could negatively impact the established safety and efficacy profile and result in possible reduced sales or product withdrawal. Such outcomes could negatively and materially affect our product
sales, operating results, and financial condition.

If other companies overcome our U.S. orphan drug marketing exclusivity or obtain
marketing exclusivity in Europe, they will be able to compete with us, and our revenues will be diminished.*

Under the Orphan Drug
Act, the FDA may grant orphan drug designation to drugs intended to treat a rare disease or condition, which is generally a disease or condition that affects fewer than 200,000 individuals in the United States. The company that obtains the first FDA
approval for a designated orphan drug for a rare disease receives marketing exclusivity for use of that drug for the designated condition for a period of seven years. Increlex has received from the FDA orphan drug marketing exclusivity for the long-term treatment of patients with severe Primary
IGFD. However, more than one



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product may be approved by the FDA for the same orphan indication or disease. As a result, even though our product has
been approved and has received marketing exclusivity for severe Primary IGFD, the FDA can still approve other drugs for use in treating the same indication or disease covered by our product, which would create a more competitive market for us. For
example, the FDA recently approved Insmed Incorporateds combination product for the treatment of severe Primary IGFD and granted Insmeds product orphan drug designation. Accordingly, notwithstanding our orphan drug designation for rhIGF-
1, Insmeds combination product for rhIGF-1 and BP-3 was deemed by the FDA to be a different drug than ours, and therefore, it competes directly with Increlex for the treatment of patients with severe Primary IGFD.

Furthermore, drugs considered to be the same as Increlex that are clinically superior or provide a major contribution to patient care may be approved for marketing by the FDA despite our initial
orphan drug marketing exclusivity. If other companies are able to overcome our U.S. orphan drug exclusivity, they will be able to compete with us, and our revenues will be diminished.

We believe that Insmeds drug has also received an orphan drug designation in Europe from the European Medicines Agency, or EMEA, that covers the
treatment of severe Primary IGFD. If Insmeds or another companys drug product is granted orphan drug marketing exclusivity for severe Primary IGFD in Europe before ours and is considered to be the same drug as ours, we would not be able
to market or sell Increlex for severe Primary
IGFD in Europe, and our revenues would be diminished.

We will not be able to sell our products if we are not able to maintain our
regulatory approval due to changes to existing regulatory requirements.

Although we have obtained regulatory approval for
Increlex in the United States for the treatment
of severe Primary IGFD, this product and our manufacturing processes are subject to continued review and ongoing regulation by the FDA post approval, including, for example, changes to manufacturing process standards or good manufacturing practices,
changes to product labeling, revisions to existing requirements or new requirements for manufacturing practices, or changing interpretations regarding regulatory guidance. Such changes in the regulatory environment and requirements could occur at
any time during the commercialization of Increlex. This could adversely affect our ability to maintain our approval or require us to expend significant resources to maintain our approval, which could result in the possible withdrawal of Increlex from the marketplace, which would harm our business
and negatively impact our financial performance.

Competitors could develop and gain FDA approval of products containing rhIGF-1,
which could adversely affect our competitive position.*

In the future, rhIGF-1 manufactured by other parties may be approved for
use in the United States. For example, we are aware that Chiron Corporation has developed a process to manufacture rhIGF-1 using yeast expression and has intellectual property with respect to that process. In the event there are other rhIGF-1
products approved by the FDA to treat indications other than those covered by Increlex, physicians may elect to prescribe a competitors product containing rhIGF-1 to treat the indications for which Increlex has received and may receive approval. This is commonly referred to as off-label use. While under FDA regulations a
competitor is not allowed to promote off-label use of its product, the FDA does not regulate the practice of medicine and as a result cannot direct physicians as to what product containing rhIGF-1 to prescribe to their patients. As a result, we
would have limited ability to prevent off-label use of a competitors product containing rhIGF-1 to treat any diseases for which we have received FDA approval even if it violates our method of use patents and/or we have orphan drug exclusivity
for the use of rhIGF-1 to treat such diseases.

Competitors could challenge our patents and file an Abbreviated New Drug Application
(ANDA) or a 505(b)(2) new drug application for an IGF-1 product and adversely affect the competitive position of Increlex.

Products approved for commercial
marketing by the FDA are subject to the provisions of the Drug Price Competition and Patent Term Restoration Act of 1984, or Hatch-Waxman Act. The Hatch-Waxman Act provides companies with marketing exclusivity for varying time periods
during which generic or modified versions of a drug may not be marketed and allows companies to apply to extend patent protection for up to five additional years. It also provides a means for approving generic versions of a drug once the marketing
exclusivity period has ended and all relevant patents have expired. The period of exclusive marketing, however, may be shortened if a patent is successfully challenged and defeated. Competitors with a generic IGF-1 product or a modified version of
IGF-1 may attempt to file an ANDA or a 505(b)(2) NDA and challenge our patents and marketing exclusivity. Such applications would have to certify that one of the patents in the Increlex NDA is invalid or not infringed by the manufacture, use, or sale of the product
described in that ANDA or 505(b)(2) application under the Hatch-Waxman Act. If successful, a competitor could come to market at an earlier time than expected. We can provide no assurances that we can prevail in a challenge or litigation related to
our patents or exclusivity.



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If we fail to protect our intellectual property rights, competitors may develop competing products,
and our business will suffer.

lf we are not able to protect our proprietary technology, trade secrets and know-how, our competitors
may use our inventions to develop competing products. We have licensed intellectual property rights, including patent rights, relating to rhIGF-1 technologies from Genentech. However, these patents may not protect us against our competitors. Patent
litigation is very expensive, and we therefore may be unable to pursue patent litigation to its conclusion because currently we do not generate revenues.

We do not have patent composition coverage on the rhIGF-1 protein alone. Although we have licensed from Genentech its rights to its methods of use and manufacturing patents, it may be more difficult to establish
infringement of such patents as compared to a patent directed to the rhIGF-1 protein composition alone. Our licensed patents may not be sufficient to prevent others from competing with us. We cannot rely solely on our patents to be successful. The
standards that the U.S. Patent and Trademark Office and foreign patent offices use to grant patents, and the standards that United States and foreign courts use to interpret patents, are not the same and are not always applied predictably or
uniformly and can change, particularly as new technologies develop. As such, the degree of patent protection obtained in the United States may differ substantially from that obtained in various foreign countries. In some instances, patents have
issued in the United States while substantially less or no protection has been obtained in Europe or other countries. Our United States Patent No. 6,331,414 B1 licensed from Genentech is directed to methods for bacterial expression of rhIGF-1
and expires in 2018. We have no equivalent European patent. The European Patent Office has determined that the claims of Genentechs corresponding European patent application are not patentable under European patent law in view of public
disclosures made before the application was filed.

We are uncertain of the level of protection, if any, that will be provided by our
licensed patents if we attempt to enforce them, and they are challenged in court where our competitors may raise defenses such as invalidity, unenforceability or possession of a valid license. For example, we initiated patent infringement
proceedings against Avecia Limited and Insmed Incorporated in the United Kingdom and against Insmed Incorporated in the United States to enforce patent rights we licensed from Genentech. The United States action, among other things, alleges
infringement of United States Patent No. 6,311,414 B1 identified above. If the court finds any of the patents at issue in those litigations, including United States Patent No. 6,311,414 B1, to be invalid or unenforceable, we would be
prevented from enforcing such patents against third parties in the future, thus preventing us from using the affected patents to exclude others from competing with us. In addition, the type and extent of patent claims that will be issued to us in
the future are uncertain. Any patents that are issued may not contain claims that will permit us to stop competitors from using similar technology.

In addition to the patented technology licensed from Genentech, we also rely on unpatented technology, trade secrets and confidential information, such as the proprietary information we use to manufacture Increlex. We may not be able to effectively protect our rights
to this technology or information. Other parties may independently develop substantially equivalent information and techniques or otherwise gain access to or disclose this technology. We generally require each of our employees, consultants,
collaborators, and certain contractors to execute a confidentiality agreement at the commencement of an employment, consulting or collaborative relationship with us. However, these agreements may not provide effective protection of this technology
or information or, in the event of unauthorized use or disclosure, they may not provide adequate remedies.

We expect to continue to
incur substantial costs as a result of patent infringement litigation or other proceedings relating to patent and other intellectual property rights, and we may be unable to protect our intellectual property rights.*

In December 2004, we initiated patent infringement proceedings against Avecia Limited and Insmed Incorporated in the United Kingdom and against Insmed in
the United States to enforce patent rights we licensed from Genentech. We cannot predict the outcome of such litigation. These actions have required a substantial diversion of financial and personnel resources and could expose us to liability for
costs or other awards of damages. Declaratory judgments of invalidity against our patents asserted in such actions could prevent us from using the affected patents to exclude others from competing with us.

In addition, a third party may claim that we are using its inventions covered by its patents and may initiate litigation to stop us from engaging in our
operations and activities. Although no third party has claimed that we are infringing on their patents, patent lawsuits are costly and could affect our results of operations and divert the attention of managerial and technical personnel. There is a
risk that a court would decide that we are infringing the third partys patents and would order us to stop the activities covered by the patents. In addition, there is a risk that a court will order us to pay the other party damages for having
infringed the other partys patents. The biotechnology industry has produced a proliferation of patents, and it is not always clear to industry participants, including us, which patents cover various types of products or methods of use. The
coverage of patents is subject to interpretation by the courts, and the interpretation is not always uniform. If we are



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sued for patent infringement, we would need to demonstrate that our products or methods of use do not infringe the patent
claims of the relevant patent and/or that the patent claims are invalid, and we may not be able to do so. Proving invalidity, in particular, is difficult since it requires a showing of clear and convincing evidence to overcome the presumption of
validity enjoyed by issued patents.

We are aware of a U.S. patent of Chiron Corporation related to processes of manufacturing rhIGF-1 in
yeast host cells, to fusion proteins, DNA, and yeast host cells useful in such processes of manufacturing rhIGF-1 in yeast host cells, and to rhIGF-1 made as a product of such processes. While we use bacterial expression, not yeast expression, in
our process for manufacturing Increlex, we cannot
predict whether our activities relating to the development and commercialization of Increlex in the United States will be found to infringe Chirons patent in the event Chiron brings patent infringement proceedings against us. We may not be able to obtain a license to
Chirons patent under commercially reasonable terms, if at all. If we are unable to obtain a license to Chirons patent, and if in any patent infringement proceeding Chiron brings against us the court decides that our activities relating
to the development and commercialization of Increlex in the United States infringe Chirons patent, the court may award damages and/or injunctive relief to Chiron. Any such damages, injunctive relief and/or other remedies the court may award could render any further
development and commercialization of Increlex
commercially infeasible for us or otherwise curtail or cease any further development and commercialization of Increlex.

We cannot be certain that others have
not filed patent applications for technology covered by our licensors issued patents or our pending applications or our licensors pending applications or that we or our licensors were the first to invent the technology because:



| |  |  | some patent applications in the United States may be maintained in secrecy until the patents are issued,
| | - |  | --------------------------------------------------------------------------------------------------------



| |  |  | patent applications in the United States and many foreign jurisdictions are typically not published until 18 months after filing, and
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------



| |  |  | publications in the scientific literature often lag behind actual discoveries and the filing of patents relating to those discoveries.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------

Patent applications may have been filed and may be filed in the future covering technology similar to ours. Any such patent application may have priority
over our patent applications and could further require us to obtain rights to issued patents covering such technologies. In the event that another party has filed a U.S. patent application on inventions similar to ours, we may have to participate in
an interference proceeding declared by the U.S. Patent and Trademark Office to determine priority of invention in the United States. The costs of these proceedings could be substantial, and it is possible that such efforts would be unsuccessful,
resulting in a loss of our United States patent position with respect to such inventions.

Some of our competitors may be able to sustain
the costs of complex patent litigation more effectively than we can because they have substantially greater resources. In addition, any uncertainties resulting from the initiation and continuation of any litigation could harm our business.

If we lose our licenses from Genentech, we may be unable to continue our business.

We have licensed intellectual property rights and technology from Genentech, under our U.S. and International License and Collaboration agreements with
Genentech. Under each agreement, Genentech has the right to terminate our license if we are in material breach of our obligations under that agreement and fail to cure that breach. Under the terms of the agreements, we are obligated, among other
things, to use reasonable business efforts to meet specified milestones, including filing for regulatory approval in the United States for either a diabetes indication or a substitute indication by December 31, 2008. If we fail to use
reasonable business efforts to meet our development milestones for either agreement, Genentech may terminate that agreement. If either agreement were terminated, then we would lose our rights to utilize the technology and intellectual property
covered by that agreement to develop, manufacture, market and sell Increlex for any indication. This may prevent us from continuing our business.

We are subject to
Genentechs option rights with respect to the commercialization of Increlex for all diabetes and non-orphan indications in the United States.

Under our U.S. license and
collaboration agreement with Genentech, Genentech has the option to elect to jointly commercialize rhIGF-1 for all diabetes and non-orphan indications in the United States. Orphan indications are designated by the FDA under the Orphan Drug Act, and
are generally rare diseases or conditions that affect fewer than 200,000 individuals in the United States. With respect to those non-orphan and diabetes indications in the United States, once Genentech has exercised its option to jointly develop and
commercialize, Genentech has the final decision on disputes relating to development and commercialization of such indications. Our ability to sublicense the development and commercialization of such products requires the consent of Genentech.



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We do not know whether our planned clinical trials will begin on time, or at all, or will be
completed on schedule, or at all.*

The commencement or completion of any of our clinical trials may be delayed or halted for
numerous reasons, including, but not limited to, the following:



| |  |  | the FDA or other regulatory authorities either do not approve a clinical trial protocol or place a clinical trial on clinical hold;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------



| |  |  | patients do not enroll in clinical trials at the rate we expect (for example, in our current Phase III clinical trials of rhIGF-1 in Primary IGFD, patients have not enrolled at the
rate we expected);
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | patients experience adverse side effects;
| | - |  | -----------------------------------------



| |  |  | patients develop medical problems that are not related to our products or product candidates;
| | - |  | ---------------------------------------------------------------------------------------------



| |  |  | third-party clinical investigators do not perform our clinical trials on our anticipated schedule or consistent with the clinical trial protocol and good clinical practices, or
other third-party organizations do not perform data collection and analysis in a timely or accurate manner;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | contract laboratories fail to follow good laboratory practices;
| | - |  | ---------------------------------------------------------------



| |  |  | interim results of the clinical trial are inconclusive or negative;
| | - |  | -------------------------------------------------------------------



| |  |  | sufficient quantities of the trial drug may not be available, or available drug may become unusable;
| | - |  | ----------------------------------------------------------------------------------------------------



| |  |  | our trial design, although approved, is inadequate to demonstrate safety and/or efficacy;
| | - |  | -----------------------------------------------------------------------------------------



| |  |  | re-evaluation of our corporate strategies and priorities; and
| | - |  | -------------------------------------------------------------



| |  |  | limited financial resources.
| | - |  | ----------------------------

In addition, we may choose
to cancel, change or delay certain planned clinical trials, or replace one or more planned clinical trials with alternative clinical trials. Our clinical trials or intended clinical trials may be subject to further change from time to time as we
evaluate our research and development priorities and available resources. Our development costs will increase if we need to perform more or larger clinical trials than planned. Significant delays for our current or planned clinical trials may harm
the commercial prospects for Increlex and our
prospects for profitability.

Clinical development is a long, expensive and uncertain process, and delay or failure can occur at any
stage of any of our clinical trials.

To gain approval to market a product for treatment of a specific disease, we must provide the
FDA and foreign regulatory authorities with clinical data that demonstrate the safety and statistically significant efficacy of that product for the treatment of the disease. Clinical development is a long, expensive and uncertain process, and delay
or failure can occur at any stage of any of our clinical trials. A number of companies in the pharmaceutical industry, including biotechnology companies, have suffered significant setbacks in advanced clinical trials, even after promising results in
earlier trials. Success in preclinical testing and early clinical trials does not ensure that later clinical trials will be successful. If a clinical trial failed to demonstrate safety and statistically significant efficacy, we would likely abandon
the development of that product, which could harm our business and may result in a precipitous decline in our stock price.

If
third-party clinical research organizations do not perform in an acceptable and timely manner, our clinical trials could be delayed or unsuccessful.

We do not have the ability to conduct all of our clinical trials independently. We rely on clinical investigators, third-party clinical research organizations and consultants to perform a substantial portion of these
functions. If we cannot locate acceptable contractors to run our clinical trials or enter into favorable agreements with them, or if these contractors do not successfully carry out their contractual duties, satisfy FDA requirements for the conduct
of clinical trials, or meet expected deadlines, we may be unable to obtain or maintain required approvals and may be unable to market and sell Increlex on a timely basis, if at all.

We will need others to market and sell Increlex in Europe and other regions of the world.*

In the event that the proposed transaction with Ipsen is
not consummated, we will need to engage others to market and sell Increlex in Europe and other regions of the world. If we receive marketing approval for Increlex in Europe and decide to sell Increlex in Europe through one or more third parties, we will need to enter into marketing arrangements with them. We may not be able to enter into marketing
arrangements with third parties on favorable terms, or at all. In addition,



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these arrangements could result in lower levels of income to us than if we marketed Increlex entirely on our own. In the event that we are unable to enter into a
marketing arrangement for Increlex in Europe or
the rest of the world, we may not be able to develop or engage an effective sales force to successfully market and sell our product in Europe or in other territories.

If we fail to identify and in-license other patent rights, products or product candidates, we may be unable to grow our revenues.*

We do not conduct any discovery research. Our strategy is to in-license products or product candidates and further develop them for commercialization. The
market for acquiring and in-licensing patent rights, products and product candidates is intensely competitive. If we are not successful in identifying and in-licensing other patent rights, products or product candidates, we may be unable to grow our
revenues with sales from additional products.

In addition, we may need additional intellectual property from other third parties to market
and sell Increlex for indications other than
severe Primary IGFD or Primary IGFD. We cannot be certain that we will be able to obtain a license to any third-party technology we may require to conduct our business.

The committed equity financing facility that we entered into with Kingsbridge Capital Limited may not be available to us if we elect to make a draw down, and may require us to pay certain liquidated damages.

In October 2005, we entered into a committed equity financing facility, or CEFF, with Kingsbridge Capital Limited, or Kingsbridge,
which entitles us to sell and obligates Kingsbridge to purchase, from time to time over a period of three years, newly issued shares of our common stock for cash consideration of up to an aggregate of $75.0 million, subject to certain conditions and
restrictions. Kingsbridge will not be obligated to purchase shares under the CEFF unless certain conditions are met, which include:



| |  |  | a minimum price for our common stock;
| | - |  | -------------------------------------



| |  |  | the accuracy of representations and warranties made to Kingsbridge;
| | - |  | -------------------------------------------------------------------



| |  |  | compliance with laws;
| | - |  | ---------------------



| |  |  | effectiveness of the registration statement, filed by us with the U.S. Securities and Exchange Commission, or SEC, for the resale of the shares of common stock issuable in
connection with the CEFF and the shares of common stock underlying the warrant we issued to Kingsbridge in connection with the entering into of the CEFF; and
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the continued listing of our stock on the Nasdaq Stock Market.
| | - |  | --------------------------------------------------------------

In
addition, Kingsbridge is permitted to terminate the CEFF if it determines that a material and adverse event has occurred affecting our business, operations, properties or financial condition. If we are unable to access funds through the CEFF, or if
the CEFF is terminated by Kingsbridge, we may be unable to access capital on favorable terms or at all.

The terms of the CEFF require us
to pay certain liquidated damages in the event that the registration statement filed by us with the SEC is not available for the resale of securities purchased by Kingsbridge under the CEFF or upon exercise of the warrant we issued to Kingsbridge.
Except for certain periods of ineffectiveness permitted under the CEFF, we are obligated to pay to Kingsbridge an amount equal to the number of shares purchased under the CEFF and held by Kingsbridge at the date the registration statement becomes
unavailable, multiplied by any positive difference in price between the volume weighted average price on the trading day prior to such period of unavailability and the volume weighted average price on the first trading day after the period of
unavailability. In addition, we are entitled in certain circumstances to deliver a blackout notice to Kingsbridge to suspend the use of the registration statement and prohibit Kingsbridge from selling shares under the registration
statement. If we deliver a blackout notice in the 15 trading days following a settlement of a draw down, then we must make a blackout payment to Kingsbridge as liquidated damages, or issue Kingsbridge additional shares in lieu of this payment,
calculated by means of a varying percentage of an amount based on the number of shares purchased and held by Kingsbridge and the change in the market price of our common stock during the period in which the use of the registration statement is
suspended. If the trading price of our common stock declines during a suspension of the registration statement, the blackout payment could be significant and could adversely affect our liquidity and our ability to raise capital.

If we fail to obtain the capital necessary to fund our operations, we will be unable to execute our business plan.*

We believe that our cash, cash equivalents and short-term investments as of June 30, 2006, together with the funds available under the CEFF (not including
funds we would receive from our proposed transaction with Ipsen, subject to the closing of the transaction), will be sufficient to meet our projected operating and capital expenditure requirements through at least the end of 2007 based on our
current business plan. If the proposed transaction with Ipsen is consummated, we will likely not be able to draw down all



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of the funds available under the CEFF. In addition, if the proposed transaction with Ipsen is consummated, we believe that our cash, cash equivalents and
short-term investments as of June 30, 2006, together with the funds we would potentially receive from Ipsen and not including our drawing down of any funds from the CEFF, would be sufficient to meet our projected operating and capital expenditure
requirements through the end of 2009. However, our future capital needs and the adequacy of our available funds will depend on many factors, including:



| |  |  | our ability to market and sell sufficient quantities of Increlex at the anticipated level;
| | - |  | -------------------------------------------------------------------------------------------



| |  |  | the commercial status of the Increlex bulk drug manufacturing operations at Cambrex Baltimore, including the success of our cGMP production activities;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the success of Increlex final drug product manufacturing;
| | - |  | ----------------------------------------------------------



| |  |  | the costs, timing and scope of additional regulatory approvals for Increlex;
| | - |  | -----------------------------------------------------------------------------



| |  |  | the closing of the proposed transaction with Ipsen, and, assuming such closing:
| | - |  | -------------------------------------------------------------------------------



| |  |  | our ability to market and sell sufficient quantities of Somatuline® Autogel® at the anticipated level;
| | - |  | ------------------------------------------------------------------------------------------------------



| |  |  | Ipsenss ability to supply Somatuline® Autogel® in sufficient quantities;
| | - |  | -------------------------------------------------------------------------



| |  |  | the cost, timing and scope of additional regulatory approvals for Somatuline® Autogel®; and
| | - |  | -------------------------------------------------------------------------------------------



| |  |  | Ipsens ability to market and sell sufficient quantities of Increlex in the licensed territories at the anticipated level;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------



| |  |  | the status of competing products;
| | - |  | ---------------------------------



| |  |  | the rate of progress and cost of our future clinical trials and other research and development activities; and
| | - |  | --------------------------------------------------------------------------------------------------------------



| |  |  | the pace of expansion of administrative and legal expenses.
| | - |  | -----------------------------------------------------------

We expect capital outlays and operating expenditures to increase over the next several years as we expand our operations. We expect that we may require and attempt to raise additional funds through equity or debt financings, collaborative
arrangements with corporate partners or from other sources, and the CEFF. However, there can be no assurance that additional financing will be available when needed, or, if available, that the terms will be favorable. If additional funds are not
available, we may be forced to curtail or cease operations.

If we are unable to manage our expected growth, we may not be able to
implement our business plan.*

Our ability to implement our business plan requires an effective planning and management process. As
of June 30, 2006, we had 110 full-time employees, and we expect to hire additional employees in the near term. Our offices are located in the San Francisco Bay area where competition for personnel with biopharmaceutical skills is intense. If we
fail to identify, attract, retain and motivate these highly skilled personnel, we may be unable to continue our development and commercialization activities.

We believe that our anticipated future growth may strain our management, systems and resources. To manage the anticipated growth of our operations, we may need to increase management resources and implement additional
financial and management controls, reporting systems and procedures. If we are unable to manage our growth, we may be unable to execute our business strategy.

If product liability lawsuits are brought against us, we may incur substantial liabilities.

One potential risk of using growth factors like rhIGF-1 is that it may increase the likelihood of developing cancer or, if patients already have cancer, that the cancer may develop more rapidly. Increlex may also increase the risk that diabetic patients may develop or worsen an existing
retinopathy, which could lead to the need for additional therapy such as laser treatment of the eyes or result in blindness. We have Phase III study results from the treatment of more than 76 children with severe Primary IGFD with Increlex for an average of more than 4.4 years, with some
patients being treated for over 12 years. None of the children withdrew from the study due to adverse events. However, some patients experienced hypoglycemia, or low blood glucose levels. Other side effects noted in some patients include hearing
deficits, enlargement of the tonsils and intracranial hypertension.

There may also be other adverse events associated with the use of
Increlex, which may result in product liability
suits being brought against us. While we have licensed the rights to develop, market and sell Increlex in certain indications, we are not indemnified by any third party, including our contract manufacturers, for any liabilities arising out of the development or use of rhIGF-1.



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Whether or not we are ultimately successful in defending product liability litigation, such litigation
would consume substantial amounts of our financial and managerial resources, and might result in adverse publicity or reduced acceptance of Increlex in the market, all of which would impair our business. We have obtained clinical trial insurance and product liability insurance; however, we
may not be able to maintain our clinical trial insurance or product liability insurance at an acceptable cost, if at all, and this insurance may not provide adequate coverage against potential claims or losses.

Budgetary or cash constraints may force us to delay our efforts to develop certain research and development programs in favor of developing others,
which may prevent us from meeting our stated timetables and completing these projects through to product commercialization.*

Because we are a company with limited financial resources, and because research, development and commercialization activities are costly processes, we must regularly prioritize the most efficient allocation of our financial resources. For
example, we may choose to delay or abandon our research and development efforts for the treatment of a particular indication or project to allocate those resources to another indication or project, or to commercialization activities, which could
cause us to fall behind our initial timetables for development. As a result, we may not be able to fully realize the value of some of our product candidates in a timely manner, since they will be delayed in reaching the market, or may not reach the
market at all.

We must implement additional finance and accounting systems, procedures and controls as we grow our business and
organization and to satisfy new reporting requirements.

As a public reporting company, we must comply with the Sarbanes-Oxley Act
of 2002 and the related rules and regulations of the Securities and Exchange Commission, including expanded disclosures and accelerated reporting requirements and more complex accounting rules. Compliance with Section 404 of the Sarbanes-Oxley
Act of 2002 and other requirements will increase our costs and require additional management resources. We have upgraded our finance and accounting systems, procedures and controls and will need to continue to implement additional procedures and
controls as we grow our business and organization and to satisfy new reporting requirements. Section 404 requires annual management assessments of the effectiveness of our internal control over financial reporting and a report by our
independent registered public accountants attesting to and reporting on these assessments. If we are unable to complete the required assessment as to the adequacy of our internal control reporting or if our independent registered public accounting
firm is unable to provide us with an unqualified report as to the effectiveness of our internal control over financial reporting, investors could lose confidence in the reliability of our internal control over financial reporting, which could
adversely affect our stock price.

If we are unable to attract and retain additional qualified personnel, our ability to market and
sell Increlex and develop other product
candidates will be harmed.

Our success depends on our continued ability to attract and retain highly qualified management and
scientific personnel and on our ability to develop relationships with leading academic scientists and clinicians. We are highly dependent on our current management and key medical, scientific and technical personnel, including: Dr. John A.
Scarlett, our President and Chief Executive Officer and Dr. Ross G. Clark, our Chief Technical Officer, whose knowledge of our industry and technical expertise would be extremely difficult to replace. We have at will employment contracts
with all of our executive officers. They may terminate their employment without cause or good reason and without notice to us.

Risks Related to the
Proposed Transaction with Ipsen*

If we are unable to complete the proposed transaction with Ipsen in a timely manner, or at all,
we may face certain material risks to our business.*

On July 18, 2006, we entered into a Stock Purchase and Master Transaction
Agreement, or Purchase Agreement, with Ipsen, S.A., or Ipsen. Ipsens obligation to complete the transactions contemplated by the Purchase Agreement to be completed at the initial closing under the Purchase Agreement is conditioned upon the
satisfaction or waiver of a number of conditions, including:



| |  |  | the absence of an event or circumstance, including litigation related to the transactions contemplated by the Purchase Agreement, that has had, or would reasonably be expected to
have, a material adverse effect on our ability to perform our obligations under the license agreements to be entered into with Ipsen simultaneously with the initial closing under the Purchase Agreement;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| |  |  | the approval by our stockholders of the required aspects of the transactions contemplated by the Purchase Agreement;
| | - |  | --------------------------------------------------------------------------------------------------------------------



| |  |  | the expiration of the waiting period under the Hart-Scott-Rodino Antitrust & Improvements Act of 1976, as amended;
| | - |  | ------------------------------------------------------------------------------------------------------------------



| |  |  | the accuracy of our representations and warranties in the Purchase Agreement as of the date of the Purchase Agreement; and
| | - |  | --------------------------------------------------------------------------------------------------------------------------



| |  |  | the receipt of all other required material governmental authorizations or approvals.
| | - |  | ------------------------------------------------------------------------------------

The Purchase Agreement may also be terminated under specified circumstances. We cannot ensure that the conditions to closing will be met or waived or that we will be able to successfully consummate the transactions
contemplated by the Purchase Agreement in a timely manner, or at all. If the transactions contemplated by the Purchase Agreement are not consummated in timely manner, or at all, we will be subject to the adverse effects of a number of material
risks, including:



| |  |  | a decline in the price of our common stock;
| | - |  | -------------------------------------------



| |  |  | the diversion of the attention of our management and our employees from day-to-day operations and the diversion of financial resources during the negotiation and pendency of the
transactions contemplated by the Purchase Agreement;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | a delay in launching Increlex in Europe and the rest of the world;
| | - |  | -------------------------------------------------------------------



| |  |  | the possible loss of other strategic partnering or business development opportunities during the pendency of the transactions contemplated by the Purchase Agreement;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the accrual of significant transaction costs, including legal and other costs relating to transactions contemplated by the Purchase Agreement;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the potential requirement to pay to Ipsen certain termination fees under circumstances specified in the Purchase Agreement; and
| | - |  | -------------------------------------------------------------------------------------------------------------------------------



| |  |  | the necessity to enter into alternative financing transactions that would be dilutive to our stockholders and may not be on favorable terms.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------

We may not realize the anticipated benefits from the proposed transactions with Ipsen.*

The Purchase Agreement provides that, simultaneously with the initial closing under the Purchase Agreement, we and Ipsen (and/or affiliates thereof) would
enter into licensing agreements with respect to Increlex and Ipsens Somatuline® Autogel® product. Under the license agreement with respect to Somatuline® Autogel®, Ipsen would grant to us exclusive rights to sell Somatuline® Autogel® in the
United States and Canada. Under the license agreement with respect to Increlex, we would grant to Ipsen exclusive rights to sell Increlex in all regions of the world, except the United States, Japan, Canada, certain Middle Eastern countries and Taiwan. Under these license agreements, we and Ipsen would grant to each other product development
rights and share the costs for improvements to, or new indications for, Somatuline® Autogel® and Increlex.

Somatuline® Autogel® may not receive U.S. regulatory approval in a timely manner, for the label that we anticipate, or at all. Even if
Somatuline® Autogel® receives U.S. regulatory approval, the approval may not be maintained,
including as a result of the failure to maintain compliance with cGMP regulations, and Ipsen may be unable to maintain the supply of the product. In addition, revenues from sales of Somatuline® Autogel® in the United States and Canada may not meet our expectations, including as a result of competing products or
unavailable or limited reimbursement by third-party payers. It is also possible that Ipsen will not successfully market and sell Increlex in the licensed territories, in which case we would not receive royalties to the extent that we currently anticipate. We also may not be able to
successfully develop additional products or improvements to, or new indications for, Somatuline® Autogel® and/or Increlex or
share the costs of such developments in a manner that is commercially feasible for us. The license agreements would also be terminable by Ipsen under certain circumstances, including certain change of control transactions related to Ipsen. In any
such or similar events,



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we may not realize the anticipated benefits from the proposed transaction. In addition to cross-licensing agreements for
Somatuline® Autogel® and Increlex, we and Ipsen have granted to each other a right of first negotiation for products in
our respective endocrine pipelines and have agreed on a framework for joint clinical development and subsequent commercialization of endocrine products on a worldwide basis. However, we can not assure you that we will be able to reach an agreement
with Ipsen on the specific terms for any of these endocrine pipeline products.

In addition, the terms of the warrant to be issued to Ipsen
simultaneously with the initial closing under the Purchase Agreement provide that the number of shares of our common stock subject to the warrant may increase in the event of issuances of equity securities by us that dilute Ipsens percentage
interest in the Company. Further, the initial exercise price of the warrant, and the conversion price of convertible notes to be issued in connection with the transactions contemplated by the Purchase Agreement, would also be subject to certain
weighted-average price-based antidilution adjustments. These terms of the warrant and convertible notes may entitle Ipsen to acquire a greater number of shares of our common stock than was anticipated at the time of execution of the Purchase
Agreement. We are also subject to currency risk on a 30.0 million convertible note that would be issued in connection with the transactions contemplated by the Purchase Agreement, which, if the note is not converted, may result in the need to
raise a greater amount of U.S. dollars to repay this note at maturity than would be required based on a conversion of this note to U.S. dollars at the time of execution of the Purchase Agreement or issuance.

In connection with the transaction, we could issue to Ipsen three convertible notes in the principal amounts of $25.0 million, 30.0 million and
$15.0 million. All of these notes would mature five years from date of issuance and carry a 2.5% coupon per annum from the date of issuance, compounded quarterly. If Ipsen chooses not to convert these notes, we would be required to pay to Ipsen the
principal amount of the notes plus accrued interest at maturity. If we are required to pay the notes in cash, we will likely need to raise such amounts from the capital markets or through a strategic transaction. There is no assurance that we would
be able to do so in a timely manner or on reasonable terms.

If the proposed transaction with Ipsen is completed, our stockholders
will experience immediate and substantial dilution.*

The shares that we would issue to Ipsen at the initial closing under the
Purchase Agreement, upon conversion of all three convertible notes that would be issuable to Ipsen and upon exercise of the warrant that would be issued to Ipsen would enable Ipsen to acquire an ownership interest in us of up to approximately 40% on
a post-transaction, fully-diluted basis, with the opportunity to increase its ownership position to 60% or greater through market purchases in certain circumstances. Ipsen would also be granted a preemptive right to purchase its pro rata
portion of new securities that we may offer in the future to maintain its percentage ownership interest. Even if Ipsen elects not to convert any of the convertible notes or the warrant that we may issue to it, upon the initial closing under the
Purchase Agreement, we will issue to Ipsen a number of shares equal to approximately 25% of our outstanding common stock on a post-closing basis which will have a substantial dilutive effect on the holdings of our current stockholders.

If the proposed transaction with Ipsen is completed, our resulting relationship with Ipsen will limit our ability to enter into transactions,
pursue opportunities in conflict with Ipsen and could cause the price of our common stock to decline.*

After the initial closing
under the Purchase Agreement, and for a potentially indefinite period, the approval of Ipsen would be required for us to take certain actions, including, but not limited to:



| |  |  | entering into most material transactions or agreements;
| | - |  | -------------------------------------------------------



| |  |  | merging or consolidating with any person other than Ipsen;
| | - |  | ----------------------------------------------------------



| |  |  | establishing or approving an operating budget with anticipated research and development spending in excess of $25.0 million per year, plus potential additional amounts for new Ipsen
projects under the license agreement with respect to Somatuline® Autogel®;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | subject to limited exceptions, incurring any indebtedness in excess of $2.5 million that would cause our ratio of net indebtedness to EBITDA to exceed 1:1;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | entering into any transaction that results in competition with Ipsen; and
| | - |  | -------------------------------------------------------------------------



| |  |  | issuing or selling shares of our capital stock, other than issuances or sales after the second anniversary of the initial closing of the transactions contemplated by the Purchase
Agreement that may not exceed $25.0 million in any three-year period and other limited exceptions.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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These provisions may limit our ability to enter into transactions otherwise viewed as beneficial to us.
In addition, all of our shares of common stock that would be owned by Ipsen would be eligible for sale in the public market after the first anniversary of the initial closing of the transactions contemplated by the Purchase Agreement, subject to
compliance with the applicable securities laws. We have agreed that, upon Ipsens request after the first anniversary of the initial closing of the transactions contemplated by the Purchase Agreement, we would file registration statements under
the Securities Act in order to permit Ipsen to offer and sell a substantial number of shares of our common stock. Sales of a substantial number of shares of our common stock by Ipsen in the public market, or the perception that such sales are likely
to occur, could adversely affect the market price of our common stock.

Ipsen may seek to influence our business in a manner that is
contrary to our goals or strategies or to the interests of our other stockholders.*

If the proposed transaction with Ipsen is
completed, based on its significant ownership position and ability to influence our business through certain protective provisions, Ipsen would exercise significant control over the outcome of most actions by our Board of Directors and those
requiring the approval of our stockholders. Accordingly, our other stockholders may be unable to prevent actions by Ipsen. In addition, we have agreed, and our amended and restated certificate of incorporation would be amended in connection with the
transactions contemplated by the Purchase Agreement to provide, among other things, that so long as Ipsen holds at least 15% of the outstanding shares of our common stock, Ipsen would be entitled to nominate two out of the nine directors on our
Board of Directors. In the event that Ipsen holds at least 10% of the outstanding shares of our common stock, but less than 15%, it would be entitled to nominate one director to our Board of Directors. Ipsen would also be entitled to nominate
additional independent director nominees, who must be independent of Ipsen, starting in 2008. We make no assurances that Ipsen will not seek to influence our business in a manner that is contrary to our goals or strategies or the interests of other
stockholders. Moreover, persons who are directors and/or officers of Ipsen and who also serve on our Board of Directors may decline to take action in a manner that might be favorable to us but adverse to Ipsen.

Risks Related to Our Common Stock

If our
results do not meet our and analysts forecasts and expectations, our stock price could decline.*

Analysts who cover our
business and operations provide valuations regarding our stock price and make recommendations whether to buy, hold or sell our stock. Our stock price may be dependent upon such valuations and recommendations. Analysts valuations and
recommendations are based primarily on our reported results and our and their forecasts and expectations concerning our future results regarding, for example, expenses, revenues, clinical trials, regulatory marketing approvals and competition. Our
future results are subject to substantial uncertainty, and we may fail to meet or exceed our and analysts forecasts and expectations as a result of a number of factors, including those discussed under the section entitled Risks Related
to Our Business above. If our results do not meet our and analysts forecasts and expectations, our stock price could decline as a result of analysts lowering their valuations and recommendations or otherwise.

If our officers, directors and largest stockholders choose to act together, they are able to control our management and operations, acting in their
best interests and not necessarily those of other stockholders.*

As of June 30, 2006, our directors, executive officers and
principal stockholders and their affiliates beneficially owned approximately 42.1% of our common stock. Our greater than five percent beneficial owners include; entities affiliated with MPM Capital, which beneficially owned 18.3%; entities
affiliated with Prospect Management Co. II, LLC, which beneficially owned 8.2%; MedImmune, Inc., which beneficially owned 8%; and entities affiliated with Rho Ventures, which beneficially owned 8%. Our directors, executive officers and principal
stockholders and their affiliates collectively have the potential ability to determine the election of all of our directors and to determine the outcome of most corporate actions requiring stockholder approval. They may exercise this ability in a
manner that advances their best interests and not necessarily those of other stockholders.

Anti-takeover provisions in our charter
documents and under Delaware law may make an acquisition of us, which may be beneficial to our stockholders, more difficult.

Provisions of our amended and restated certificate of incorporation and bylaws, as well as provisions of Delaware law, could make it more difficult for a third party to acquire us, even if doing so would benefit our stockholders. These
provisions:



| |  |  | establish a classified Board of Directors so that not all members of our board may be elected at one time;
| | - |  | ----------------------------------------------------------------------------------------------------------



| |  |  | authorize the issuance of blank check preferred stock that could be issued by our Board of Directors to increase the number of outstanding shares and hinder a takeover
attempt;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| |  |  | limit who may call a special meeting of stockholders;
| | - |  | -----------------------------------------------------



| |  |  | prohibit stockholder action by written consent, thereby requiring all stockholder actions to be taken at a meeting of our stockholders; and
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | establish advance notice requirements for nominations for election to our Board of Directors or for proposing matters that can be acted upon at stockholder meetings.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------

In addition, Section 203 of the Delaware General Corporation Law, which prohibits business combinations between us and
one or more significant stockholders unless specified conditions are met, may discourage, delay or prevent a third party from acquiring us.

The committed equity financing facility that we entered into with Kingsbridge may result in dilution to our stockholders.

Pursuant to the CEFF, Kingsbridge committed to purchase, subject to certain conditions and at our election, up to $75.0 million of our common stock. Should we sell shares to Kingsbridge under the CEFF, or issue shares in lieu of any
blackout payment, it will have a dilutive effect on the holdings of our current stockholders, and may result in downward pressure on the price of our common stock. If we draw down amounts under the CEFF, we will issue shares to
Kingsbridge at a discount of up to ten percent from the volume weighted average price of our common stock. If we draw down amounts under the CEFF when our share price is decreasing, we will need to issue more shares to raise the same amount than if
our stock price was higher. Issuances in the face of a declining share price will have an even greater dilutive effect than if our share price were stable or increasing, and may further decrease our share price.

Our stock price may be volatile, and an investment in our stock could decline in value. *

The trading price of our common stock has fluctuated significantly since our initial public offering in March 2004, and is likely to remain volatile in
the future. The trading price of our common stock could be subject to wide fluctuations in response to many events or factors, including the following:



| |  |  | announcements by us or our competitors of regulatory developments, product development agreements, clinical trial results, clinical trial enrollment, regulatory filings, new
products and product launches, significant acquisitions, strategic partnerships or joint ventures;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | estimates of our business potential and earnings prospects;
| | - |  | -----------------------------------------------------------



| |  |  | deviations from analysts projections regarding business potential, costs and/or earnings prospects;
| | - |  | ----------------------------------------------------------------------------------------------------



| |  |  | quarterly variations in our operating results;
| | - |  | ----------------------------------------------



| |  |  | significant developments in the businesses of biotechnology companies;
| | - |  | ----------------------------------------------------------------------



| |  |  | changes in financial estimates by securities analysts;
| | - |  | ------------------------------------------------------



| |  |  | changes in market valuations or financial results of biotechnology companies;
| | - |  | -----------------------------------------------------------------------------



| |  |  | additions or departures of key personnel;
| | - |  | -----------------------------------------



| |  |  | changes in the structure of healthcare payment or reimbursement systems, regulations or policies;
| | - |  | -------------------------------------------------------------------------------------------------



| |  |  | activities of short sellers and risk arbitrageurs;
| | - |  | --------------------------------------------------



| |  |  | future sales of our common stock;
| | - |  | ---------------------------------



| |  |  | general economic, industry and market conditions; and
| | - |  | -----------------------------------------------------



| |  |  | volume fluctuations, which are particularly common among highly volatile securities of biotechnology companies.
| | - |  | ---------------------------------------------------------------------------------------------------------------

In addition, the stock market has experienced volatility that has particularly affected the market prices of equity securities of many biotechnology
companies, which often has been unrelated or disproportionate to the operating performance of these companies. These broad market fluctuations may adversely affect the market price of our common stock. If the market price of our common stock
declines in value, you may not realize any return on your investment in us and may lose some or all of your investment.

We are at
risk of securities class action litigation.

In the past, securities class action litigation has often been brought against a
company following a decline in the market price of its securities. This risk is especially relevant for us because biotechnology companies have experienced greater than average stock price volatility in recent years. If we faced such litigation, it
could result in substantial costs and a diversion of managements attention and resources, which could harm our business.



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Substantial sales of shares may impact the market price of our common stock.*

If our stockholders sell substantial amounts of our common stock, including shares issued upon the exercise of outstanding options or pursuant to the
CEFF and the shares issued or issuable to Ipsen if the proposed transaction with Ipsen is consummated, the market price of our common stock may decline. In addition, the perceived risk of dilution from sales of our common stock to or by Kingsbridge
or Ipsen may cause holders of our common stock to sell their shares, or it may encourage short selling by market participants, which could contribute to a decline in our stock price. These sales also might make it more difficult for us to sell
equity or equity-related securities in the future at a time and price that we deem appropriate. We are unable to predict the effect that sales may have on the prevailing market price of our common stock. As of June 30, 2006, we had 37,581,734
outstanding shares of common stock. Of these shares, the 18,975,000 shares sold in our public offerings were freely tradable without restriction or further registration unless purchased by our affiliates. Of the remaining 18,606,734 shares
outstanding as of June 30, 2006, substantially all of these shares were eligible for sale in the public market (subject to certain restrictions on sales by affiliates and vesting in the case of early exercised options). As of June 30,
2006, we had 4,125,187 shares subject to outstanding options granted under our equity compensation plans.

We have filed a registration
statement covering shares of common stock issuable upon exercise of options and other grants pursuant to our stock plans. In September 2005, we filed a shelf registration statement pursuant to which we may, from time-to-time, sell shares of our
common stock and preferred stock, various series of debt securities and/or warrants to purchase any of such securities, either individually or in units, in one or more offerings. In November 2005, we also filed a registration statement for the
resale of the shares of common stock issuable in connection with the CEFF and the shares of common stock underlying the warrant we issued to Kingsbridge in connection with our entering into the CEFF. Moreover, we have agreed that, upon Ipsens
request after the first anniversary of the initial closing of the transactions contemplated by the Purchase Agreement, we would file registration statements in order to permit Ipsen to offer and sell a substantial number of shares of our common
stock. In addition, certain holders of shares of our common stock that are parties to our amended and restated investors rights agreement are entitled to registration rights.



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ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

On March 22, 2004, we completed
our initial public offering of 5,500,000 shares of our common stock at a public offering price of $9 per share. On April 2, 2004, we received net cash proceeds from the issuance of 825,000 shares of common stock in connection with the
underwriters exercise of the over-allotment option. The shares of common stock sold in the offering were registered under the Securities Act of 1933, as amended, on a Registration Statement on Form S-1 (File No. 333-108729) that was
declared effective by the SEC on March 16, 2004. The aggregate purchase price of the offering was $56,925,000. The net offering proceeds to us after deducting total expenses and underwriting discounts and commissions were $50,021,000. None of
the expenses were paid, directly or indirectly, to directors, officers or persons owning ten percent or more of our common stock or to their associates, or to our affiliates. As of June 30, 2006, we had used all of the net offering proceeds for
general corporate purposes, including research and development expenses, manufacturing expenses, clinical trials and selling, general and administrative expenses. No such payments were made to directors, officers or persons owning ten percent or
more of our common stock or to their associates, or to our affiliates, other than payments in the ordinary course of business to officers for salaries and to non-employee directors as compensation for Board or Board committee service.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

On June 6, 2006, our Annual Meeting of
Stockholders was held at our corporate offices located at 2000 Sierra Point Parkway, Brisbane, California. During this meeting, our stockholders voted on the following two proposals:

(a) Proposal to elect three directors to hold office until the 2009 Annual Meeting of Stockholders:



|                        |  |            |  |         
|----------------------- |  | ---------- |  | --------
|                        |  | Votes     
|Nominee                 |  | For        |  | Withheld
|Alexander Barkas, Ph.D. |  | 27,776,033 |  | 184,136 
|Dennis Henner, Ph.D.    |  | 27,670,725 |  | 289,444 
|Mark Leschly            |  | 27,660,625 |  | 299,544 

Our Class III directors, John A. Scarlett, M.D., Karin Eastham and Thomas G. Wiggans, will each
continue to serve on our Board of Directors until our 2007 Annual Meeting of Stockholders and until his or her successor is elected and has qualified, or until his or her earlier death, resignation or removal. Our Class I directors, Ross G. Clark,
Ph.D., Michael J. Astrue and David L. Mahoney, will each continue to serve on our Board of Directors until our 2008 Annual Meeting of Stockholders and until his successor is elected and has qualified, or until his earlier death, resignation or
removal.

(b) Proposal to ratify the selection by the Audit Committee of our Board of Directors of Ernst & Young LLP as our
independent registered public accounting firm for the fiscal year ending December 31, 2006:



|           |  |               |  |        
|---------- |  | ------------- |  | -------
|For        |  | Votes Against |  | Abstain
|27,788,229 |  | 85,940        |  | 86,000 



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ITEM 6. EXHIBITS



|      |  |                                                                                                                                                
|----- |  | -----------------------------------------------------------------------------------------------------------------------------------------------
|3.1   |  | Certificate of Incorporation (1)                                                                                                               
|      | 
|3.2   |  | By-laws (2)                                                                                                                                    
|      | 
|4.1   |  | Form of Specimen Stock Certificate (2)                                                                                                         
|      | 
|4.2   |  | Reference is made to Exhibits 3.1 and 3.2                                                                                                      
|      | 
|4.3   |  | Warrant issued to Kingsbridge Capital Limited, dated October 14, 2005(3)                                                                       
|      | 
|10.6G |  | First Amendment to Lease Agreement dated May 1, 2006 between Clarendon Hills Investors, LLC and the Registrant                                 
|      | 
|31.1  |  | Certification of Chief Executive Officer of Tercica, Inc., as required by Rule 13a-14(a) or Rule 15d-14(a).                                    
|      | 
|31.2  |  | Certification of Chief Financial Officer of Tercica, Inc., as required by Rule 13a-14(a) or Rule 15d-14(a).                                    
|      | 
|32.1  |  | Certification by the Chief Executive Officer, as required by Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. 1350).
|      | 
|32.2  |  | Certification by the Chief Financial Officer, as required by Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. 1350).

---

|(1) | Incorporated by reference to the Registrants quarterly report on Form 10-Q (File No. 000-50461) filed on May 13, 2004.
|--- | -----------------------------------------------------------------------------------------------------------------------

|(2) | Incorporated by reference to the Registrants registration statement on Form S-1 (File No. 333-108729) and amendments thereto, declared effective on March 16, 2004.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) | Incorporated by reference to the Registrants quarterly report on Form 10-Q (File No. 000-50461) filed on November 4, 2005.
|--- | ---------------------------------------------------------------------------------------------------------------------------



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SIGNATURE

Pursuant to the requirements of the Securities and Exchange Act of 1934, the registrant has duly caused this report
to be signed on its behalf by the undersigned thereunto duly authorized.

Dated: August 9, 2006



TERCICA, INC. (Registrant)/s/ Ajay BansalAjay Bansal Chief Financial Officer(Authorized Officer and Principal Financial Officer)




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