Document:

<PAGE>   1
                                                                   EXHIBIT 10.38
                                CREDIT AGREEMENT

                             TERMINATION AND RELEASE

     This CREDIT AGREEMENT TERMINATION AND RELEASE ("Credit Agreement
Termination") is made as of December 10, 2000, by and between PHARMACIA & UPJOHN
COMPANY, a Delaware corporation ("P&U "), and INSITE VISION INCORPORATED, a
Delaware corporation ("InSite"). InSite and P&U may be referred to herein
individually as a "Party" or collectively as the "Parties."

                                    RECITALS

     WHEREAS, InSite and P&U entered into a Credit Agreement on November 11,
1999 (the "Credit Agreement"), pursuant to which P&U agreed to make available to
InSite a line of credit of up to $4,000,000 under certain terms and conditions;

     WHEREAS, no Credit Loans or other advances or credit extensions have been
made pursuant to the Credit Agreement.

     WHEREAS, the Parties desire to terminate the Credit Agreement and the
rights and obligations of the Parties thereunder in accordance with the terms
hereof;

     WHEREAS, contemporaneous with the execution of this Credit Agreement
Termination, InSite and Pharmacia & Upjohn AB, an Affiliate of P&U, are
terminating the ISV-900 Project Agreement dated November 11, 1999 by and between
such parties (the "ISV-900 Project Agreement") pursuant to that certain ISV-900
Project Agreement Termination and Release dated of even date herewith (the
"ISV-900 Project Agreement Termination and Release").

     NOW THEREFORE, in consideration of the covenants and promises in this
Credit Agreement Termination, InSite and P&U agree as follows:

                                   ARTICLE I.

                       TERMINATION OF THE CREDIT AGREEMENT

     Section 1.1 DEFINITIONS. For purposes of this Credit Agreement Termination,
the initially capitalized terms used herein without definition shall have the
meanings ascribed thereto in the Credit Agreement, whether used in the singular
or plural. The use of defined terms from the Credit Agreement is solely for
administrative convenience and shall not, in and of itself, be construed as
implying any part of the Credit Agreement continues beyond termination.

     Section 1.2 TERMINATION. The Parties hereby terminate the Credit Agreement.
Such termination is made mutually by the Parties without reference to any
specific provision of the Credit Agreement. Subject to the terms and conditions
hereof and notwithstanding anything contained in the Credit Agreement to the
contrary, InSite and P&U hereby agree that all of the rights and obligations of
the Parties under the Credit Agreement of whatever nature are hereby

<PAGE>   2

terminated. Specifically, and without limitation, InSite's right to request any
Credit Loans and P&U's obligation to make any Credit Loans, are hereby
terminated.

     Section 1.3 RELEASE.

          (a)  In connection with the termination of the Credit Agreement, and
     notwithstanding anything contained in the Credit Agreement to the contrary,
     each Party (on behalf of itself and its shareholders, employees, officers,
     agents, directors and affiliates) hereby fully and forever releases and
     discharges the other Party and its affiliates and each of their respective
     shareholders, employees, agents, officers and directors from any and all
     claims, actions, causes of action, obligations, losses, damages,
     liabilities, costs and expenses of any kind or nature arising out of or
     related to the Credit Agreement, the Parties' performance under, failure to
     perform under or interactions pursuant to such agreement, or the
     termination of such agreement, whether known or unknown as of the date
     hereof and whether arising in the past, present or future.

          (b)  Each Party hereby acknowledges that it has considered the
     possibility that it may not now fully know the nature or value of the
     claims that are generally released pursuant to this Agreement and that such
     general release extends to all claims of every nature and kind, known or
     unknown, suspected or unsuspected, past, present or future, however
     arising, and that any and all rights granted to such pursuant to Section
     1542 of the California Civil Code or any analogous applicable New York
     state or other state, federal or foreign law or regulation are hereby
     expressly waived. Said Section 1542 of the Civil Code of the State of
     California reads as follows:

     A GENERAL RELEASE DOES NOT EXTEND TO CLAIMS WHICH THE CREDITOR DOES NOT
     KNOW OR SUSPECT TO EXIST IN HIS FAVOR AT THE TIME OF EXECUTING THE RELEASE,
     WHICH IF KNOWN BY HIM MUST HAVE MATERIALLY AFFECTED HIS SETTLEMENT WITH THE
     DEBTOR.

     Section 1.4 Return of Credit Note. In connection with the termination of
the Credit Agreement, P&U hereby acknowledges that InSite shall have no further
obligations under that certain Credit Note, dated November 11, 1999, executed by
InSite in favor of P&U. P&U agrees promptly to return to InSite the originally
executed copy of such Credit Note, marked satisfied.

     Section 1.6 Representations and Warranties.

          (a)  Each of the Parties severally represents and warrants (as to
     itself only) as follows: (i) such party has all the requisite power and
     authority to enter into this Agreement, and (ii) this Agreement will
     constitute, when executed, the valid and binding obligation of such party
     enforceable against such party in accordance with its terms.

          (b)  Each Party represents and warrants that it has not voluntarily or
     involuntarily transferred, conveyed, pledged, assigned or made any other
     disposition of any rights, interest, or causes of action relating to the
     Credit Agreement.

                                       2
<PAGE>   3

                                   ARTICLE II.

                                  MISCELLANEOUS

     Section 2.1 ENTIRE AGREEMENT. This Credit Agreement Termination and the
ISV-900 Project Agreement Termination and Release embody and set forth the
entire agreement and understanding of the Parties with respect to the subject
matter herein and therein. There are no promises, terms, conditions or
obligations, oral or written, expressed or implied, other than those contained
in such documents with respect to the subject matter herein and therein.

     Section 2.2 HEADINGS, INTERPRETATION. The headings used in this Credit
Agreement Termination are for convenience only and are not a part of this Credit
Agreement Termination nor shall they affect the interpretation of any of its
provisions.

     Section 2.3 GOVERNING LAW. This Credit Agreement Termination shall be
governed by and construed under the laws of the State of New York, excluding its
conflict of laws principles. The parties agree to submit to the exclusive
jurisdiction of New York courts to resolve any controversy.

     Section 2.4 INTERPRETATION. The Parties hereto acknowledge and agree that
(i) each Party and its representatives has reviewed and negotiated the terms and
provisions of this Credit Agreement Termination and have contributed to its
revision, (ii) the rule of construction to the effect that any ambiguities are
resolved against the drafting Party shall not be employed in the interpretation
of this Credit Agreement Termination and (iii) the terms and provisions of this
Credit Agreement Termination shall be construed fairly as to each Party hereto
and not in favor of or against either Party regardless of which Party was
generally responsible for the preparation of this Credit Agreement Termination.

     Section 2.5 COUNTERPARTS. This Credit Agreement Termination may be executed
in two or more counterparts, each of which shall be deemed an original, but all
of which together shall constitute a single agreement.

     Section 2.6 PRESS RELEASES. Except as permitted by Section 7.9 of the
ISV-900 Project Agreement Termination and Release between InSite and Pharmacia &
Upjohn AB dated as of the date hereof, P&U and InSite agree not to make any
disclosures, issue any statements or otherwise cause to be disclosed any
information related to the ISV-900 Project Agreement, the Credit Agreement or
the termination of such agreements without the prior written consent of the
other.

     Section 2.7 FURTHER ASSURANCES. Each Party shall execute and deliver such
additional instruments and other documents and use all commercially reasonable
efforts to take or cause to be taken, all actions and to do, or cause to be
done, all things necessary under applicable law to consummate the termination
contemplated hereby.

                                       3
<PAGE>   4

     IN WITNESS WHEREOF, the parties hereto have each caused this Credit
Agreement Termination to be duly executed as of the date first above written.

INSITE VISION INCORPORATED

By: /s/ S. Kumar Chandrasekaran, Ph.D.
    -----------------------------------
Name:  S. Kumar Chandrasekaran, Ph.D.
Title:   CEO and Chairman of the Board

PHARMACIA & UPJOHN COMPANY

By: /s/  Per-0lof Andersson
    ------------------------------
Name:  Per-Olof Andersson
Title:  VP Exploratory Development

                                       4<PAGE>   1
                                                                   EXHIBIT 10.81
                                                CONFIDENTIAL TREATMENT REQUESTED

                                  Amendment Two
                                Supply Agreement

This Amendment Two ("Amendment") amends the Supply Agreement, dated August 18,
1998, and its Amendment One, dated July 7, 1999 ("Agreement"), is effective
December 31, 2000 ("Effective Date"), and is made by and between Maxtor
Corporation, a Delaware corporation, having principal places of business at 510
Cottonwood Drive, Milpitas, California 95035 U.S.A. and 2190 Miller Drive,
Longmont, Colorado 80501 U.S.A. ("Maxtor") and MMC Technology, Inc., a
California corporation, having its principal place of business at 2001 Fortune
Drive, San Jose, California 95131 ("MMC").

Whereas,MMC has requested Maxtor assistance with pricing and payment terms, due
        to failure of a recent acquisition offer; and

Whereas,Maxtor agrees that this arrangement is necessary to ensure continuity
        of supply of quality material to support Maxtor needs;

NOW, THEREFORE, FOR GOOD AND VALUABLE CONSIDERATION, THE RECEIPT AND ADEQUACY OF
WHICH IS HEREBY ACKNOWLEDGED, AND IN CONSIDERATION OF THE ABOVE PREMISES AND THE
MUTUAL PROMISES CONTAINED IN THIS AGREEMENT, THE PARTIES AGREE TO AMEND THE
AGREEMENT AS FOLLOWS:

Paragraph 1.4.1 (A) is amended to read as follows:

        1.4.1  Product Price.
               (A) Product Price shall be calculated according to the following
        rules, and applied on a reconciliation basis to the entire Maxtor
        purchase of Products in a fiscal quarter. The parties shall use their
        best efforts to calculate such reconciliations in time for posting for
        the effected quarter or other reporting period.

               The purchase price for Product paid to MMC by Maxtor shall be
        /***/.

        Single-sided Product Price. Notwithstanding the foregoing, single-sided
        Product shall be priced at /***/ of the corresponding double-sided
        Product, in the proportion of the actual total Product purchases in each
        fiscal quarter or applicable pricing period.

2.      Paragraph 2.12.1 is amended to read as follows:
        2.12.1 Terms. Invoices shall be due and payable within /***/ days after
        the date of invoice. In cases where an invoice is not issued, payment
        shall be due within /***/ days after the delivery of the Product.
        Maxtor's payment advice shall reference MMC's invoice number(s) and
        date(s).

3.      The above terms shall be in effect from the first day of Maxtor's first
        fiscal quarter of 2001 (December 31, 2000) until the last day of
        Maxtor's second fiscal quarter of 2001 (June 30, 2001). After such time,
        the present terms of the Agreement shall be full force and effect and
        the terms of this Amendment shall have no further force or effect.

/***/ Indicates confidential material redacted and filed separately with the
Commission.

THIS AMENDMENT, INCLUDING THE AGREEMENT OF WHICH IT IS A PART, IS A COMPLETE AND
EXCLUSIVE STATEMENT OF THE AGREEMENT BETWEEN THE PARTIES, WHICH SUPERSEDES ALL
PRIOR OR

                                     1 of 2
<PAGE>   2
                                                CONFIDENTIAL TREATMENT REQUESTED

CONCURRENT PROPOSALS AND UNDERSTANDINGS, WHETHER ORAL OR WRITTEN, AND ALL OTHER
COMMUNICATIONS BETWEEN THE PARTIES RELATING TO ITS SUBJECT MATTER.
NOTWITHSTANDING ANYTHING TO THE CONTRARY IN THE AGREEMENT, IN THE EVENT OF A
CONFLICT BETWEEN THIS AMENDMENT AND THE AGREEMENT, THIS AMENDMENT SHALL PREVAIL.
ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED AND ARE RATIFIED HEREBY.

In witness whereof, the parties have executed this Amendment as of its Effective
Date.

MAXTOR CORPORATION                            MMC TECHNOLOGIES, INC.

By: /s/ David L. Beaver                      By: /s/ Ian Sanders
   ---------------------------------             -------------------------------
   (signature)                                   (signature)

   David L. Beaver                               Ian Sanders
------------------------------------          ----------------------------------
   (print name)                                  (print name)

   V.P. Worldwide Materials                      Chief Technical Officer
------------------------------------          ----------------------------------
   (title)                                       (title)

                                     2 of 2

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00023-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00023-of-00352.parquet"}]]