Document:

Secured Promissory Note

 Exhibit 10.15 
 CONFIDENTIAL TREATMENT REQUESTED 
 WITH RESPECT TO CERTAIN PORTIONS HEREOF

 DENOTED WITH “***” 
 SECURED PROMISSORY NOTE 
  

			
	U.S. $4,000,000	  	Dated: September 5, 2007

 FOR VALUE RECEIVED, the undersigned, Arius Two, Inc., a Delaware corporation (the
“Borrower”), HEREBY UNCONDITIONALLY PROMISES TO PAY to the order of QLT USA, Inc., a Delaware corporation (the “Lender”), the principal sum of FOUR MILLION UNITED STATES DOLLARS (U.S. $4,000,000), without interest, except as
otherwise provided in this Secured Promissory Note (“Note”), as follows. 
 This Note has been executed and delivered pursuant to,
and in accordance with the terms and conditions of, the Intellectual Property Assignment Agreement, dated September 5, 2007, by and between Borrower and Lender (the “Transfer Agreement”) and is subject to the terms and conditions of
the Transfer Agreement, which are, by this reference, incorporated herein and made a part hereof. Capitalized terms used in this Note without definition shall have the respective meanings set forth in the Transfer Agreement. 
 Borrower shall pay the principal amount of this Note in accordance with the terms and conditions set forth in the Transfer Agreement, including, without
limitation, the payment schedule set forth in Section 2.03(b) thereof. 
 In the event that any amount of principal, or any other amount
payable hereunder, is not paid in full when due (whether by acceleration or otherwise), the Borrower shall pay interest on such unpaid principal, interest or other amount, from the date such amount becomes due until the date such amount is paid in
full, payable on demand, at a rate of ***% per annum; provided that payment of any such interest at such rate shall not constitute a waiver of any Event of Default and shall be without prejudice to the right of the Lender to exercise
any of its rights and remedies hereunder. All computations of interest shall be made on the basis of a year of 360 days for the actual number of days (including the first day but excluding the last day) occurring in the period for which such
interest is payable. In no event shall the Borrower be obligated to pay the Lender interest, charges or fees at a rate in excess of the highest rate permitted by applicable law. 
 All payments hereunder shall be made in lawful money of the United States of America and in same day or immediately available funds, prior to 1:00 pm
(Colorado time), to the Lender, in accordance with the Lender’s payment instructions received by Borrower in writing at least one (1) Business Day in advance of the due date of such payment. 
 Whenever any payment hereunder shall be stated to be due, or whenever any other date specified hereunder would otherwise occur, on a day other than a
Business Day (as defined below), then, except as otherwise provided herein, such payment shall be made, and such interest payment date or other date shall occur, on the next succeeding Business Day, and such extension of time shall in such case be
included in the computation of payment of interest hereunder. As used herein, “Business Day” means a day other than a Saturday or a Sunday on which banks are open for business in the State of Colorado. 

 CONFIDENTIAL TREATMENT REQUESTED 
 WITH RESPECT TO CERTAIN PORTIONS HEREOF 
 DENOTED WITH “***” 
  

 The Borrower agrees to make all payments under this Note without setoff or deduction and regardless
of any counterclaim or defense, including, without limitation, any deduction or setoff arising out of or in connection with the Transfer Agreement; provided, however, that no payment hereunder shall be deemed to be a waiver of any
right or claim that the Borrower may have under the Transfer Agreement. The Borrower represents and warrants to the Lender that there is no claim, defense, counterclaim or set-off which could be asserted by or is available to the Borrower against
the Lender. 
 The Borrower may, at any time and from time to time, prepay the outstanding amount hereof in whole or in part, without premium
or penalty. 
 “Event of Default” shall mean the occurrence or existence of any one or more of the following: 
 1. The Borrower shall fail to pay when due, as set forth in the Transfer Agreement, any amount of principal or other amount payable hereunder. 

2. The Borrower defaults in the performance of, or compliance with, or is in breach of, any term or condition contained in this Note, or defaults in
the performance of, or compliance with, or is in breach of any material term or condition contained in, the Collateral Documents (as defined in the Security Agreement), as determined by Lender in its reasonable discretion, or any levy upon, seizure
or attachment of any of the Collateral (as defined in the Security Agreement) occurs, and such default is not cured within fifteen (15) days of written notice thereof to Borrower. 
 3. The Borrower or any other Person shall contest in any manner the validity or enforceability of this Note, the Transfer Agreement or the Collateral
Documents, or the Borrower or any other Person shall deny that it has any liability or obligation thereunder; or any of the Collateral Documents for any reason, except to the extent permitted by the terms thereof. 
 4. The Borrower or BioDelivery Sciences International, Inc., a Delaware corporation and parent of Borrower (“Guarantor”) shall admit in writing
its inability to, or shall fail generally or be generally unable to, pay its debts (including its payrolls) as such debts become due, or shall make a general assignment for the benefit of creditors; or the Borrower or Guarantor shall file a
voluntary petition in bankruptcy or a petition or answer seeking reorganization, to effect a plan or other arrangement with creditors or any other relief under the Bankruptcy Reform Act of 1978, as amended or recodified from time to time (the
“Bankruptcy Code”) or under any other state or federal law relating to bankruptcy or reorganization granting relief to debtors, whether now or hereafter in effect, or shall file an answer admitting the jurisdiction of the court and the
material allegations of any involuntary petition filed against the Borrower or Guarantor pursuant to the Bankruptcy Code or any such other state or federal law; or the Borrower or Guarantor shall be adjudicated a bankrupt, or shall make an
assignment for the benefit of creditors, or shall apply for or consent to the appointment of any custodian, 

  

 2 

 CONFIDENTIAL TREATMENT REQUESTED 
 WITH RESPECT TO CERTAIN PORTIONS HEREOF 
 DENOTED WITH “***” 
  

 
receiver or trustee for all or any substantial part of the Borrower’s or Guarantor’s property, or shall take any action to authorize any of the
actions or events set forth above in this subparagraph 4; or an involuntary petition seeking any of the relief specified in this subparagraph 4 shall be filed against the Borrower or Guarantor and shall not be dismissed within
90 days; or any order for relief shall be entered against the Borrower or Guarantor in any involuntary proceeding under the Bankruptcy Code or any such other state or federal law referred to in this subparagraph 4. 
 5. The Borrower or Guarantor shall (i) liquidate, wind up or dissolve (or suffer any liquidation, wind-up or dissolution), except to the extent
expressly permitted by this Note, (ii) suspend its operations other than in the ordinary course of business, or (iii) take any action to authorize any of the actions or events set forth above in this subparagraph 5. 
 6. Guarantor defaults in the performance of or compliance with or is in breach of any term or condition contained in the Guaranty or any Guaranty or any
other document or instrument relating thereto shall for any reason be revoked or invalidated, or otherwise cease to be in full force and effect, or any Guarantor or any other Person shall contest in any manner the validity or enforceability thereof
or deny that it has any further liability or obligation thereunder. 
 7. The Collateral Documents shall cease to create a valid and
perfected first priority Lien in any of the Collateral purported to be covered thereby. 
 If any Event of Default shall occur, the Lender
may (i) declare the entire unpaid principal amount of this Note and all other amounts payable hereunder to be forthwith due and payable, whereupon all unpaid principal under this Note and all such other amounts shall become and be forthwith due
and payable, without presentment, demand, protest, notice of intent to accelerate, notice of acceleration or other legal requirement of any kind, all of which are hereby expressly waived by the Borrower, provided that upon the occurrence of
an actual or deemed entry of an order for relief with respect to the Borrower under the Bankruptcy Code, the result which would otherwise occur only upon giving of notice by the Lender to the Borrower as specified above shall occur automatically,
without the giving of any such notice; and (ii) whether or not the actions referred to in clause (i) have been taken, exercise any or all of the Lender’s rights and remedies under the Collateral Documents and any Guaranty,
and proceed to enforce all other rights and remedies available to the Lender under applicable law. 
 No amendment or waiver of any
provision of this Note, nor any consent to any departure by the Borrower therefrom, shall in any event be effective unless the same shall be in writing and signed by the Lender and then such amendment, waiver or consent shall be effective only in
the specific instance and for the specific purpose for which given. 
 All notices and other communications provided for hereunder shall,
unless otherwise stated herein, be in writing (including by facsimile) and mailed (by certified or registered mail), sent or delivered to the respective parties hereto at or to the following addresses or facsimile numbers (or at or to such other
address or facsimile number as shall be designated by any party in a written notice to the other parties hereto): 
  

 3 

 CONFIDENTIAL TREATMENT REQUESTED 
 WITH RESPECT TO CERTAIN PORTIONS HEREOF 
 DENOTED WITH “***” 
  

			
	If to the Lender:	  	 QLT USA, Inc.
 2579 Midpoint Drive
 Fort Collins, CO 80525

		  	Attn: President
		  	Facsimile: (970) 482-9735
		
	If to the Borrower:	  	 Arius Two, Inc.
 2501 Aerial Center Parkway, Suite 205

 Morrisville, North Carolina 27560

		  	Attn: Chief Executive Officer
		  	Facsimile: (919) 653-5161

 All such notices and communications shall be effective (i) if delivered by hand, sent by certified or
registered mail or sent by an overnight courier service, when received; and (ii) if sent by facsimile transmission, when sent. 
 This
Note, the Transfer Agreement and the Collateral Documents reflect the entire agreement between Borrower and Lender with respect to the matters set forth therein and supersede any prior agreements, commitments, drafts, communication, discussions and
understandings, oral or written, with respect thereto. 
 No failure on the part of the Lender to exercise, and no delay in exercising, any
right, remedy, power or privilege hereunder shall operate as a waiver thereof, nor shall any single or partial exercise of any such right, remedy, power or privilege preclude any other or further exercise thereof or the exercise of any other right,
remedy, power or privilege. The rights and remedies under this Note are cumulative and not exclusive of any rights, remedies, powers and privileges that may otherwise be available to the Lender. 
 Time is of the essence for the performance of each and every obligation under this Note. 
 Whenever possible, each provision of this Note shall be interpreted in such manner as to be effective and valid under all applicable laws and
regulations. If, however, any provision of this Note shall be prohibited by or invalid under any such law or regulation in any jurisdiction, it shall, as to such jurisdiction, be deemed modified to conform to the minimum requirements of such law or
regulation, or, if for any reason it is not deemed so modified, it shall be ineffective and invalid only to the extent of such prohibition or invalidity without affecting the remaining provisions of this Note, or the validity or effectiveness of
such provision in any other jurisdiction. 
 The Borrower agrees to pay on demand all documented costs and expenses of the Lender, and
documented fees and disbursements of counsel, in connection with (i) any amendments, modifications or waivers of the terms hereof, (ii) any Default or Event of Default, (iii) the enforcement or attempted enforcement of, and
preservation of any rights under, this Note, and (iv) any out-of-court workout or other refinancing or restructuring or in any bankruptcy case, including, without limitation, any and all losses, and documented costs and 

  

 4 

 CONFIDENTIAL TREATMENT REQUESTED 
 WITH RESPECT TO CERTAIN PORTIONS HEREOF 
 DENOTED WITH “***” 
  

 
expenses sustained by the Lender as a result of any failure by the Borrower to perform or observe its obligations contained herein. In addition, the Borrower
agrees to indemnify the Lender against and hold it harmless from any and all present and future stamp, transfer, documentary and other such taxes, levies, fees, assessments and other charges made by any jurisdiction by reason of the execution,
delivery, performance and enforcement of this Note. 
 This Note shall be binding upon, inure to the benefit of and be enforceable by the
Borrower, the Lender and the Lender’s respective successors and assigns. 
 The Borrower shall not have the right to assign its rights
and obligations hereunder or any interest herein or therein, without Lender’s prior written consent. The Lender may sell, assign, transfer or grant participations in all or any portion of the Lender’s rights and obligations hereunder. In
the event of any such assignment the assignee shall be deemed the “Lender” for all purposes of this Note and any other documents and instruments relating hereto with respect to the rights and obligations assigned to it. The Borrower agrees
that in connection with any such transfer or assignment, the Lender may deliver to the prospective participant or assignee financial statements and other relevant information relating to the Borrower. 
 This Note is secured by certain collateral (the “Collateral”) more specifically described in the Security Agreement between the Borrower and
the Lender of even date herewith, any other agreement pursuant to which the Borrower, any Guarantor or any other Person provides a Lien on its assets in favor of the Lender and all filings, documents and agreements made or delivered pursuant
thereto. 
 THIS NOTE SHALL BE GOVERNED BY, AND CONSTRUED AND ENFORCED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK (AS PERMITTED BY
SECTION 5-1401 OF THE NEW YORK GENERAL OBLIGATIONS LAW), WITHOUT GIVING EFFECT TO ANY CHOICE OF LAW RULE THAT WOULD CAUSE THE APPLICATION OF THE LAWS OF ANY JURISDICTION OTHER THAN THE INTERNAL LAWS OF THE STATE OF NEW YORK TO THE RIGHTS AND DUTIES
OF THE PARTIES. 
 THE BORROWER AND, BY ITS ACCEPTANCE HEREOF, THE LENDER, HEREBY WAIVE THEIR RESPECTIVE RIGHTS TO A TRIAL BY JURY OF ANY
CLAIM OR CAUSE OF ACTION BASED UPON OR ARISING OUT OF OR RELATED TO THIS NOTE. 
 IN WITNESS WHEREOF, the Borrower has duly executed this
Note, as of the date first above written. 
  

			
	
	ARIUS TWO, INC.
		
	By	 	 /s/ Mark A. Sirgo

		 	Mark Sirgo, President

  

 5Guaranty

 Exhibit 10.16 
 GUARANTY 
 THIS GUARANTY (“Guaranty”), dated as of September 5, 2007, is made by
BioDelivery Sciences International, Inc., a Delaware corporation (“Guarantor”), in favor of QLT USA, Inc., a Delaware corporation (“Lender”). 
 WITNESSETH: 
 WHEREAS, Arius Two, Inc., a Delaware corporation and wholly-owned subsidiary of
Guarantor (hereinafter referred to as the “Company” or “Borrower”), has promised to pay Lender $4,000,000 in accordance with the terms of the Intellectual Property Assignment Agreement dated September 5, 2007 between the
Company and Lender (the “Transfer Agreement”) and the Secured Promissory Note dated September 5, 2007, executed by the Company in favor of Lender (the “Note” and together with the Transfer Agreement and the other Collateral
Documents, the “Loan Documents”) in connection with the Transfer Agreement; 
 WHEREAS, in order to induce Lender to enter into the
Transfer Agreement and extend credit to the Company, Guarantor has agreed to guarantee the indebtedness and other obligations of the Company to Lender; and 
 WHEREAS, Guarantor owns 100% of the outstanding stock of the Company and as such will derive direct and indirect economic benefits from the Transfer Agreement and the extension of credit to the Company; 
 NOW, THEREFORE, in consideration of the premises and the covenants hereinafter contained, and to induce Lender to enter into, and extend credit under,
the Transfer Agreement, it is agreed as follows: 
 1. DEFINITIONS. 
 Capitalized terms used herein shall have the meanings assigned to them in the Transfer Agreement, unless otherwise defined herein. 
 “Collateral” shall have the meaning set forth in the Security Agreement. 
 “Collateral
Documents” shall have the meaning set forth in the Security Agreement. 
 “Taxes” means any present and future taxes, levies,
imposts, duties, fees, assessments, charges, deductions or withholdings and all liabilities with respect thereto, excluding income and franchise taxes (and any equivalents thereof) imposed on Guarantor. 
 References herein to this “Guaranty” shall mean this Guaranty, including all amendments, modifications and supplements and any annexes,
exhibits and schedules to any of the foregoing, and shall refer to this Guaranty as the same may be in effect at the time such reference becomes operative. 

 2. THE GUARANTY. 
 2.1 Guaranty of Obligations of Borrower. Guarantor hereby unconditionally guarantees to Lender, and its respective successors, endorsees, transferees and assigns, the prompt payment (whether at stated maturity,
by acceleration or otherwise) and performance of the obligations of Borrower to Lender under the Loan Documents (hereinafter the “Obligations”). Guarantor agrees that this Guaranty is a guaranty of payment and performance and not of
collection, and that its obligations under this Guaranty shall be primary, absolute and unconditional, irrespective of, and unaffected by: 
 (a) the genuineness, validity, regularity, enforceability or any future amendment of, or change in this Guaranty, any other Loan Document or any other agreement, document or instrument to which any Person is a party
thereto and/or Guarantor is or may become a party; 
 (b) the absence of any action to enforce this Guaranty or any other Loan
Document or the waiver or consent by Lender with respect to any of the provisions thereof; 
 (c) the existence, value or
condition of, or failure to perfect Lender’s lien against, any Collateral for the Obligations or any action, or the absence of any action, by Lender in respect thereof (including, without limitation, the release of any such security);

 (d) the insolvency of Borrower; or 
 (e) any other action or circumstances which might otherwise constitute a legal or equitable discharge or defense of a surety or guarantor
other than payment and performance in full of the Obligations, 
 it being agreed by Guarantor that its obligations under this Guaranty shall not be
discharged until the Obligations are paid in full (the “Termination Date”). Guarantor shall be regarded, and shall be in the same position, as Borrower with respect to the Obligations. Guarantor agrees that any notice or directive given at
any time to Lender which is inconsistent with the waiver in the immediately preceding sentence shall be null and void and may be ignored by Lender, and, in addition, may not be pleaded or introduced as evidence in any litigation relating to this
Guaranty for the reason that such pleading or introduction would be at variance with the written terms of this Guaranty, unless Lender has specifically agreed otherwise in writing. It is agreed among Guarantor and Lender that the foregoing waivers
are of the essence of the transaction contemplated by the Loan Documents and that, but for this Guaranty and such waivers, Lender would decline to enter into the Loan Documents. 
 (f) Notwithstanding any provision to the contrary contained herein, in the Transfer Agreement or in any other of the Loan Documents, to
the extent the obligations of Guarantor hereunder, or liens or security interests granted by Guarantor to secure its obligations hereunder shall be adjudicated (or would, but for the existence of this provision be adjudicated) to be invalid or
unenforceable for any reason (including, without limitation, because of Section 548 of Chapter 11 of the Bankruptcy Code or under any applicable state Uniform Fraudulent Transfer Act, Uniform Fraudulent 

 
Conveyance Act or similar statute or common law), then the obligations of Guarantor under this Guaranty and the right to recover proceeds from the
enforcement of liens or security interests granted by Guarantor shall be limited to the maximum amount that is permissible under applicable law (whether federal or state and including, without limitation, the Bankruptcy Code). 
 2.2 Demand by Lender. In addition to the terms of the Guaranty set forth in Section 2.1 hereof, and in no manner imposing any
limitation on such terms, it is expressly understood and agreed that, if, at any time, the outstanding principal amount of the Obligations under the Transfer Agreement and the Note (including all accrued interest thereon) is declared to be
immediately due and payable, then Guarantor shall, upon notice of such acceleration, without further demand, pay to Lender the entire outstanding Obligations due and owing to Lender. Payment by Guarantor shall be made to Lender in immediately
available funds to an account, designated by Lender or at the address set forth herein for the giving of notice to Lender or at any other address that may be specified in writing from time to time by Lender, and shall be credited and applied to the
Obligations. 
 2.3 Enforcement of Guaranty. In no event shall Lender have any obligation (although it is entitled, at its option) to
proceed against Borrower or any Collateral pledged to secure Obligations before seeking satisfaction from the Guarantor, and Lender may proceed, prior or subsequent to, or simultaneously with, the enforcement of Lender’s rights hereunder, to
exercise any right or remedy which they may have against any Collateral, as a result of any lien it may have as security for all or any portion of the Obligations. 
 2.4 Waiver. In addition to the waivers contained in Section 2.1 hereof, Guarantor waives and agrees that it shall not at any time insist upon, plead or in any manner whatever claim or take the
benefit or advantage of, any appraisal, valuation, stay, extension, marshaling of assets or redemption laws, or exemption, whether now or at any time hereafter in force, which may delay, prevent or otherwise affect the performance by Guarantor of
its obligations under, or the enforcement by Lender of, this Guaranty. Guarantor hereby waives diligence, presentment and demand (whether for non-payment or protest or of acceptance, maturity, extension of time, change in nature or form of the
obligations, acceptance of further security, release of further security, composition or agreement arrived at as to the amount of, or the terms of, the obligations, notice of adverse change in Borrower’s financial condition or any other fact
which might increase the risk to Guarantor) with respect to any of the obligations or all other demands whatsoever and waives the benefit of all provisions of law which are in conflict with the terms of this Guaranty. Guarantor represents, warrants
and agrees that, as of the date of this Guaranty, its obligations under this Guaranty are not subject to any offsets or defenses against Lender or Borrower of any kind. Guarantor further agrees that its obligations under this Guaranty shall not be
subject to any counterclaims, offsets or defenses against Lender or against Borrower of any kind which may arise in the future. 
 2.5
Benefit of Guaranty. The provisions of this Guaranty are for the benefit of Lender and its respective successors, transferees, endorsees and assigns, and nothing herein contained shall impair, as between Borrower and Lender, the obligations
of Borrower under the Loan Documents. In the event all or any part of the Obligations are transferred, endorsed or 

 
assigned by Lender to any Person or Persons, any reference to “Lender” herein shall be deemed to refer equally to such Person or Persons.

 2.6 Modification of Obligations, Etc. Guarantor hereby acknowledges and agrees that Lender may, subject to the terms of the
Transfer Agreement, Note, and other Collateral Documents, at any time or from time to time, with or without the consent of, or notice to, Guarantor: 
 (a) change or extend the manner, place or terms of payment of, or renew or alter all or any portion of, the Obligations; 
 (b) take any action under or in respect of the Loan Documents in the exercise of any remedy, power or privilege contained therein or available to it at law, equity or otherwise, or waive or refrain from exercising any
such remedies, powers or privileges; 
 (c) amend or modify, in any manner whatsoever, the Loan Documents (except this
Guaranty); 
 (d) extend or waive the time for Borrower’s performance of, or compliance with, any term, covenant or
agreement on its part to be performed or observed under the Loan Documents, or waive such performance or compliance or consent to a failure of, or departure from, such performance or compliance; 
 (e) take and hold Collateral for the payment of the Obligations guaranteed hereby or sell, exchange, release, dispose of, or otherwise
deal with, any property pledged, mortgaged or conveyed, or in which Lender has been granted a lien, to secure any Obligations; 
 (f) release anyone who may be liable in any manner for the payment of any amounts owed by Guarantor or Borrower to Lender; 
 (g) modify or terminate the terms of any intercreditor or subordination agreement pursuant to which claims of other creditors of Guarantor or Borrower are subordinated to the claims of Lender; and/or 
 (h) apply any sums by whomever paid or however realized to any amounts owing by Guarantor or Borrower to Lender in such manner as Lender
shall determine in its discretion; 
 Lender shall not incur any liability to Guarantor as a result thereof, and no such action shall impair or release the
Obligations of Guarantor under this Guaranty, except for Lender’s intentional bad faith actions or omissions. 
 2.7
Reinstatement. This Guaranty shall remain in full force and effect and continue to be effective should any petition be filed by or against Borrower or Guarantor for liquidation or reorganization, should Borrower or Guarantor become insolvent
or make an assignment for the benefit of creditors or should a receiver or trustee be appointed for all or any significant part of Borrower’s or Guarantor’s assets, and shall continue to be effective or be reinstated, as the case 

 
may be, if at any time payment and performance of the Obligations, or any part thereof, is, pursuant to applicable law, rescinded or reduced in amount, or
must otherwise be restored or returned by Lender, whether as a “voidable preference”, “fraudulent conveyance”, or otherwise, all as though such payment or performance had not been made. In the event that any payment, or any part
thereof, is rescinded, reduced, restored or returned, the Obligations shall be reinstated and deemed reduced only by such amount paid and not so rescinded, reduced, restored or returned. 
 2.8 Subrogation. Notwithstanding anything to the contrary in this Guaranty, or in any Loan Document and until the Obligations shall be satisfied
in full and this Guaranty terminated, Guarantor (on behalf of itself and its successors and assigns (including any surety)), shall not have, and Guarantor shall not directly or indirectly exercise: 
 (a) any rights at law or in equity to subrogation, to reimbursement, to exoneration, to contribution, to indemnification, to set off or to
any other rights that could accrue to a surety against a principal, to a guarantor against a principal, to a guarantor against a maker or obligor, to an accommodation party against the party accommodated, to a holder or transferee against a maker,
or to the holder of any claim against any Person, and which Guarantor may have or hereafter acquire against Borrower in connection with or as a result of Guarantor’s execution, delivery and/or performance of this Guaranty, or any other
documents to which Guarantor is a party or otherwise; and 
 (b) acknowledges and agrees (i) that this Section 2.8
is intended to benefit Lender and shall not limit or otherwise effect Guarantor’s liability hereunder or the enforceability of this Guaranty, and (ii) Lender and its respective successors and assigns are intended third party beneficiaries
of the waivers and agreements set forth in this Section 2.8. 
 2.9 Election of Remedies. If Lender may, under applicable
law, proceed to realize benefits under any of the Loan Documents giving Lender a lien upon any Collateral owned by Borrower, either by judicial foreclosure or by non-judicial sale or enforcement, Lender may, at its sole option, determine which of
such remedies or rights it may pursue without affecting any of such rights and remedies under this Guaranty. If, in the exercise of any of its rights and remedies, Lender shall forfeit any of its rights or remedies, including its right to enter a
deficiency judgment against Borrower, whether because of any applicable laws pertaining to “election of remedies” or the like, Guarantor hereby consents to such action by Lender and waives any claim based upon such action, even if such
action by Lender shall result in a full or partial loss of any rights of subrogation which Guarantor might otherwise have had but for such action by Lender. Any election of remedies which results in the denial or impairment of the right of Lender to
seek a deficiency judgment against Borrower shall not impair Guarantor’s obligation to pay the full amount of the Obligations. In the event Lender shall bid at any foreclosure or trustee’s sale or at any private sale permitted by law or
the Loan Documents, Lender may bid all or less than the amount of the Obligations and the amount of such bid need not be paid by Lender but shall be credited against the Obligations. The amount of the successful bid at any such sale shall be
presumptively deemed to be the fair market value of the collateral and the difference between such bid amount and the remaining balance of the Obligations shall be presumptively deemed to be the amount of the Obligations guaranteed under this
Guaranty, 

 
notwithstanding that any present or future law or court decision or ruling may have the effect of reducing the amount of any deficiency claim to which Lender
might otherwise be entitled but for such bidding at any such sale. 
 2.10 Funds Transfers. If Guarantor receives cash proceeds as a
result of any transaction or event as a result of which Borrower is required to make a mandatory prepayment with respect to the Obligations under the terms of the Loan Documents (including any issuance or sale of Guarantor’s Stock or any sale
of its assets), Guarantor shall distribute to the Borrower an amount equal to such cash proceeds that are required to be applied to the mandatory prepayment required under the terms of the Loan Documents. 
 3. FURTHER ASSURANCES. 
 Guarantor agrees, upon the
reasonable written request of Lender, to execute and deliver to Lender, from time to time, any additional instruments or documents reasonably considered necessary by Lender to cause this Guaranty to be, become or remain valid and effective in
accordance with its terms. 
 4. PAYMENTS FREE AND CLEAR OF TAXES. 
 All payments required to be made by Guarantor hereunder shall be made to Lender free and clear of, and without deduction for, any and all present and future Taxes. If Guarantor shall be required by law to deduct any
Taxes from or in respect of any sum payable hereunder, (a) the sum payable shall be increased as much as shall be necessary so that after making all required deductions (including deductions applicable to additional sums payable under this
Section 4) Lender, as applicable, receive an amount equal to the sum they would have received had no such deductions been made, (b) Guarantor shall make such deductions, and (c) Guarantor shall pay the full amount deducted to
the relevant taxing or other authority in accordance with applicable law. Within thirty (30) days after the date of any payment of Taxes, Guarantor shall furnish to Lender the original or a certified copy of a receipt evidencing payment
thereof. Guarantor shall indemnify and, within ten (10) days of demand therefor, pay Lender for the full amount of Taxes (including any Taxes imposed by any jurisdiction on amounts payable under this Section 4) paid by Lender, as
appropriate, and any liability (including penalties, interest and expenses) arising therefrom or with respect thereto, whether or not such Taxes were correctly or legally asserted. 
 5. OTHER TERMS. 
 5.1 Entire Agreement. This Guaranty, together with the other Loan Documents,
constitutes the entire agreement between the parties with respect to the subject matter hereof and supersedes all prior agreements relating to a guaranty of the loans under the Loan Documents and/or the Obligations. 
 5.2 Headings. The headings in this Guaranty are for convenience of reference only and are not part of the substance of this Guaranty. 

5.3 Severability. Whenever possible, each provision of this Guaranty shall be interpreted in such a manner to be effective and valid under
applicable law, but if any provision 

 
of this Guaranty shall be prohibited by or invalid under applicable law, such provision shall be ineffective to the extent of such prohibition or invalidity,
without invalidating the remainder of such provision or the remaining provisions of this Guaranty. 
 5.4 Notices. Whenever it is
provided herein that any notice, demand, request, consent, approval, declaration or other communication shall or may be given to or served upon any of the parties by any other party, or whenever any of the parties desires to give or serve upon
another any such communication with respect to this Guaranty, each such notice, demand, request, consent, approval, declaration or other communication shall be in writing and shall be addressed to the party to be notified as follows: 
  

			
	If to Lender:	  	QLT USA, Inc.
		  	2579 Midpoint Drive
		  	Fort Collins, Colorado 80525
		  	Attention: President
		  	Fax: (970) 482-9735
		
	If to Guarantor:	  	at the address of Guarantor specified on the signature page hereto.

 or at such other address as may be substituted by notice given as herein provided. The giving of any notice
required hereunder may be waived in writing by the party entitled to receive such notice. Every notice, demand, request, consent, approval, declaration or other communication hereunder shall be deemed to have been validly served, given or delivered
(i) upon the earlier of actual receipt and five (5) Business Days after the same shall have been deposited with the United States mail, registered or certified mail, return receipt requested, with proper postage prepaid, (ii) upon
transmission, when sent by telecopy or other similar facsimile transmission (with such telecopy or facsimile promptly confirmed by delivery of a copy by personal delivery or United States mail as otherwise provided in this Section 4.4),
(iii) one (1) Business Day after deposit with a reputable overnight carrier with all charges prepaid, or (iv) when delivered, if hand-delivered by messenger. 
 5.5 Successors and Assigns. This Guaranty and all obligations of Guarantor hereunder shall be binding upon the successors and assigns of Guarantor
(including a debtor-in-possession on behalf of Guarantor) and shall, together with the rights and remedies of Lender, for the benefit of Lender, hereunder, inure to the benefit of Lender, all future holders of any instrument evidencing any of the
Obligations and their respective successors and assigns. No sales of participations, other sales, assignments, transfers or other dispositions of any agreement governing or instrument evidencing the Obligations or any portion thereof or interest
therein shall in any manner affect the rights of Lender hereunder. Guarantor may not assign, sell, hypothecate or otherwise transfer any interest in or obligation under this Guaranty without the prior written consent of Lender, provided that,
notwithstanding the foregoing, Guarantor shall be entitled to assign, sell, hypothecate, or transfer its interest in or obligations under this Guaranty. 
 5.6 No Waiver; Cumulative Remedies; Amendments. Lender shall not, by any act, delay, omission or otherwise, be deemed to have waived any of its rights or remedies hereunder, and no waiver shall be valid unless
in writing, signed by Lender and then only to the extent 

 
therein set forth. A waiver by Lender of any right or remedy hereunder on any one occasion shall not be construed as a bar to any right or remedy which
Lender would otherwise have had on any future occasion. No failure to exercise nor any delay in exercising on the part of Lender, any right, power or privilege hereunder, shall operate as a waiver thereof, nor shall any single or partial exercise of
any right, power or privilege hereunder preclude any other or future exercise thereof or the exercise of any other right, power or privilege. The rights and remedies hereunder provided are cumulative and may be exercised singly or concurrently, and
are not exclusive of any rights and remedies provided by law. None of the terms or provisions of this Guaranty may be waived, altered, modified, supplemented or amended except by an instrument in writing, duly executed by Lender and Guarantor.

 5.7 Termination. This Guaranty is a continuing guaranty and shall remain in full force and effect until the Termination Date. Upon
payment and performance in full of the Obligations (other than contingent indemnification obligations as to which no claim has been asserted), Lender shall deliver to Guarantor such documents as Guarantor may reasonably request to evidence such
termination. 
 5.8 Counterparts. This Guaranty may be executed in any number of counterparts, each of which shall collectively and
separately constitute one and the same agreement. 
 6. GOVERNING LAW. THIS GUARANTY AND THE OBLIGATIONS ARISING HEREUNDER SHALL BE GOVERNED BY AND SHALL BE
CONSTRUED AND ENFORCED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK. 
 7. WAIVER OF JURY TRIAL. BECAUSE DISPUTES ARISING IN
CONNECTION WITH COMPLEX FINANCIAL TRANSACTIONS ARE MOST QUICKLY AND ECONOMICALLY RESOLVED BY AN EXPERIENCED AND EXPERT PERSON AND THE PARTIES WISH APPLICABLE STATE AND FEDERAL LAWS TO APPLY (RATHER THAN ARBITRATION RULES), THE PARTIES DESIRE THAT
DISPUTES ARISING HEREUNDER OR RELATING HERETO BE RESOLVED BY A JUDGE APPLYING SUCH APPLICABLE LAWS. THEREFORE, TO ACHIEVE THE BEST COMBINATION OF THE BENEFITS OF THE JUDICIAL SYSTEM AND OF ARBITRATION, THE PARTIES HERETO WAIVE ALL RIGHT TO TRIAL BY
JURY IN ANY ACTION, SUIT OR PROCEEDING BROUGHT TO RESOLVE ANY DISPUTE, WHETHER SOUNDING IN CONTRACT, TORT, OR OTHERWISE, AMONG LENDER AND GUARANTOR ARISING OUT OF, CONNECTED WITH, RELATED TO, OR INCIDENTAL TO THE RELATIONSHIP ESTABLISHED IN
CONNECTION WITH, THIS GUARANTY OR THE TRANSACTIONS RELATED HERETO. 
 [Signature page to follow.] 

 IN WITNESS WHEREOF, the party hereto has executed and delivered this Guaranty as of the date first above
written. 
  

			
	BIODELIVERY SCIENCES INTERNATIONAL, INC.
		
	By	 	 /s/ Mark A. Sirgo

	Title:	 	President and CEO
	
	2501 Aerial Center Parkway, Suite 205
	Morrisville, North Carolina 27560
	Attn: Chief Executive Officer
	Fax: (919) 653-5161

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