SONUS PHARMACEUTICALS INC
10-Q, 1998-05-07
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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<PAGE>   1
================================================================================

                     U.S. SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON D.C. 20549

                                    FORM 10-Q

[X]     QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES
        EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED MARCH 31, 1998

                                       or

[ ]     TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES
        EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM ______________ TO
        ____________.

                         Commission file number 0-26866

                           SONUS PHARMACEUTICALS, INC.
             (Exact Name of Registrant as Specified in Its Charter)

          DELAWARE                                     95-4343413
(State or Other Jurisdiction of       (I.R.S. Employer Identification Number)
      Incorporation or
                                                   Organization)

                  22026 20TH AVE. SE, BOTHELL, WASHINGTON 98021
                    (Address of Principal Executive Offices)

                                 (425) 487-9500
              (Registrant's Telephone Number, Including Area Code)


Indicate by check whether the issuer (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 [ ] 

State the number of shares outstanding of each of the issuer's classes of common
equity as of the latest practicable date.


<TABLE>
<CAPTION>
           Class                             Outstanding at April 30, 1998
           -----                             -----------------------------
<S>                                          <C>
Common Stock, $.001 par value                        8,615,451
</TABLE>

                               Page 1 of 13 Pages
                        Exhibit Index appears on Page 11

================================================================================


<PAGE>   2
                           SONUS PHARMACEUTICALS, INC.
                               INDEX TO FORM 10-Q


<TABLE>
<CAPTION>
PART I.  FINANCIAL INFORMATION                                                                           Page Number
                                                                                                         -----------
<S>                                                                                                      <C>
         Item 1.  Financial Statements
                  
                  Balance Sheets as of March 31, 1998 (unaudited) and December 31, 1997 ...............       3
                  
                  Statements of Operations (unaudited) for the three months ended
                      March 31, 1998 and March 31, 1997 ...............................................       4

                  Statements of Cash Flow (unaudited) for the three months ended
                      March 31, 1998 and March 31, 1997 ...............................................       5
                  
                  Notes to Financial Statements .......................................................       6
         
         Item 2.  Management's Discussion and Analysis of Financial Condition and Results of Operations       7

PART II. OTHER INFORMATION

         Item 1.  Legal Proceedings ...................................................................      10
         
         Item 4.  Submission of Matters to a Vote of Security Holders .................................      10
         
         Item 6.  Exhibits and Reports on Form 8-K ....................................................      11
         
         Items 2,3 and 5 are not applicable and therefore have been ommitted 

SIGNATURES ............................................................................................      12
</TABLE>


                                       2


<PAGE>   3
PART I.  FINANCIAL INFORMATION

ITEM 1.  FINANCIAL STATEMENTS

                           SONUS PHARMACEUTICALS, INC.
                                 BALANCE SHEETS


<TABLE>
<CAPTION>
                                                                           MARCH 31,        DECEMBER 31,
                                                                             1998               1997
                                                                         ------------       ------------
<S>                                                                      <C>                <C>         
ASSETS                                                                   (UNAUDITED)
Current assets:
   Cash and cash equivalents ......................................      $  5,154,194       $  5,253,227
   Marketable securities ..........................................        18,466,433         21,317,835
   Other current assets ...........................................           544,749            599,303
                                                                         ------------       ------------
     Total current assets .........................................        24,165,376         27,170,365

Equipment, furniture and leasehold improvements, net of accumulated
   depreciation of $1,938,173 and $1,738,269 ......................         1,748,812          1,734,737
Other assets ......................................................            40,667             40,667
                                                                         ------------       ------------
Total assets ......................................................      $ 25,954,855       $ 28,945,769
                                                                         ============       ============


LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
   Bank line of credit ............................................      $  5,000,000       $  5,000,000
   Accounts payable and accrued expenses ..........................         2,301,000          2,612,065
   Accrued clinical trial expenses ................................         1,802,088          1,743,208
   Current portion of capital lease obligations ...................           130,483            146,762
                                                                         ------------       ------------
     Total current liabilities ....................................         9,233,571          9,502,035

Long-term debt ....................................................         1,328,811            845,939
Capital lease obligations, less current portion ...................            75,217             93,178
Commitments
Stockholders' equity:
   Preferred stock, $.001 par value:
     5,000,000 authorized; no shares issued or outstanding ........                --                 --
   Common stock, $.001 par value:
     20,000,000 shares authorized; 8,615,451 and 8,611,376
     shares issued and outstanding in 1998 and 1997, respectively .        34,939,884         34,860,237
   Accumulated deficit ............................................       (19,610,125)       (16,338,949)
   Deferred compensation ..........................................           (12,503)           (16,671)
                                                                         ------------       ------------
     Total stockholders' equity ...................................        15,317,256         18,504,617
                                                                         ------------       ------------
Total liabilities and stockholders' equity ........................      $ 25,954,855       $ 28,945,769
                                                                         ============       ============
</TABLE>

                             See accompanying notes.


                                       3


<PAGE>   4
                           SONUS PHARMACEUTICALS, INC.
                            STATEMENTS OF OPERATIONS
                                   (UNAUDITED)


<TABLE>
<CAPTION>
                                                                   THREE MONTHS ENDED MARCH 31, 
                                                                  -----------------------------
                                                                     1998              1997
                                                                  -----------       -----------
<S>                                                               <C>               <C>        
Revenues:
   Collaborative agreements ...............................       $ 1,700,000       $ 5,100,000

Operating expenses:
   Research and development ...............................         3,550,056         2,583,986
   General and administrative .............................         1,656,574         1,187,610
                                                                  -----------       -----------
   Total operating expenses ...............................         5,206,630         3,771,596
                                                                  -----------       -----------

Operating income (loss) ...................................        (3,506,630)        1,328,404

Other income (expense):
   Interest income ........................................           294,051           249,971
   Interest expense .......................................           (54,113)          (32,188)
                                                                  -----------       -----------
Income (loss) before income taxes .........................        (3,266,692)        1,546,187

Income taxes ..............................................                --           190,000
                                                                  -----------       -----------
Net income (loss) .........................................       $(3,266,692)      $ 1,356,187
                                                                  ===========       ===========

Net income (loss) per share:
   Basic ..................................................       $     (0.38)      $      0.16
   Diluted ................................................       $     (0.38)      $      0.14

Shares used in computation of net income (loss) per share:
   Basic ..................................................         8,612,923         8,531,352
   Diluted ................................................         8,612,923         9,497,082
</TABLE>


                             See accompanying notes.


                                       4


<PAGE>   5
                           SONUS PHARMACEUTICALS, INC.
                            STATEMENTS OF CASH FLOWS
                                   (UNAUDITED)


<TABLE>
<CAPTION>
                                                                             THREE MONTHS ENDED MARCH 31,
                                                                           -------------------------------
                                                                               1998               1997
                                                                           ------------       ------------
<S>                                                                        <C>                <C>         
OPERATING ACTIVITIES:
Net income (loss) ...................................................      $ (3,266,692)      $  1,356,187
Adjustments to reconcile net income (loss) to net cash provided by
     (used in) operating activities:
   Depreciation and amortization ....................................           204,072            129,220
   Amortization of discount on marketable securities ................           (10,903)           (30,949)
   Realized gain on marketable securities ...........................            (6,533)              (840)
   Changes in operating assets and liabilities:
     Other current assets ...........................................            54,554             81,321
     Accounts payable and accrued expenses ..........................          (311,065)           (61,809)
     Accrued clinical trial expenses ................................            58,880            171,242
     Deferred revenue ...............................................                --         (1,000,000)
                                                                           ------------       ------------
Net cash provided by (used in) operating activities .................        (3,277,687)           644,372

INVESTING ACTIVITIES:
Purchases of equipment, furniture and leasehold improvements ........          (213,979)          (153,838)
Purchases of marketable securities ..................................       (10,663,563)        (8,005,737)
Proceeds from sale of marketable securities .........................        13,041,869          2,000,000
Proceeds from maturities of marketable securities ...................           486,048          3,939,376
                                                                           ------------       ------------
Net cash provided by (used in) investing activities .................         2,650,375         (2,220,199)

FINANCING ACTIVITIES:
Proceeds from bank line of credit ...................................         5,000,000          5,000,000
Repayment of bank line of credit ....................................        (5,000,000)        (5,000,000)
Proceeds from long-term debt ........................................           482,872                 --
Repayment of capitalized lease obligations ..........................           (34,240)           (46,476)
Proceeds from issuance of common stock and warrants .................            79,647             38,339
                                                                           ------------       ------------
Net cash provided by (used in) financing activities .................           528,279             (8,137)
                                                                           ------------       ------------

Change in cash and cash equivalents for the period ..................           (99,033)        (1,583,964)
Cash and cash equivalents at beginning of period ....................         5,253,227          7,236,615
                                                                           ------------       ------------
Cash and cash equivalents at end of period ..........................      $  5,154,194       $  5,652,651
                                                                           ============       ============

Supplemental cash flow information:
   Interest paid ....................................................      $     17,097       $     32,188
   Income taxes paid ................................................      $      7,500       $     40,000
</TABLE>


                             See accompanying notes.


                                       5


<PAGE>   6
                           SONUS PHARMACEUTICALS, INC.
                          NOTES TO FINANCIAL STATEMENTS
                                   (UNAUDITED)

1.       BASIS OF PRESENTATION

         The unaudited financial statements have been prepared in accordance
with generally accepted accounting principles for interim financial information
and with the instructions to Form 10-Q. Accordingly, they do not include all of
the information and footnotes required to be presented for complete financial
statements. The accompanying financial statements reflect all adjustments
(consisting only of normal recurring items) which are, in the opinion of
management, necessary for a fair presentation of the results for the interim
periods presented.

         The financial statements and related disclosures have been prepared
with the assumption that users of the interim financial information have read or
have access to the audited financial statements for the preceding fiscal year.
Accordingly, these financial statements should be read in conjunction with the
audited financial statements and the related notes thereto included in the Form
10-K for the year ended December 31, 1997.

2.       RECENT ACCOUNTING PRONOUNCEMENTS

         In 1997, the Company adopted Statement of Financial Accounting
Standards No. 128, "Earnings Per Share ("EPS")" (SFAS 128). In accordance with
this statement, the Company has presented both basic and diluted EPS. Basic EPS
is based on the weighted average number of common shares outstanding. Diluted
EPS is based on the weighted average number of common shares and dilutive
potential common shares. Dilutive potential common shares are calculated under
the treasury stock method and consist of unexercised stock options and warrants.
Amounts previously reported have been restated to conform to the provisions of
SFAS 128.

         During 1997, the Financial Accounting Standards Board issued SFAS No.
130, "Reporting Comprehensive Income." SFAS 130 requires unrealized gains or
losses on the Company's available-for-sale securities, which are currently
reported in shareholders' equity, to be included in other comprehensive income.
SFAS 130 is effective for financial statements for fiscal years beginning after
December 15, 1997 and all interim periods thereafter. The total of other
comprehensive income for the periods ended March 31, 1998 and 1997 are
immaterial.

         During 1997, the Financial Accounting Standards Board issued SFAS No.
131, "Disclosures about Segments of an Enterprise and Related Information." SFAS
No. 131 is effective for financial statements for fiscal years beginning after
December 15, 1997. The adoption of SFAS No. 131 is not expected to have a
material impact on the Company's results of operations, financial position or
cash flows.


                                       6


<PAGE>   7
ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
         RESULTS OF OPERATIONS

OVERVIEW

         The Company is primarily engaged in the research, development and
commercialization of proprietary contrast agents for use in ultrasound imaging.
The Company has financed its research and development and clinical trials
through payments received under agreements with its collaborative partners,
private equity and debt financings, and an initial public offering ("IPO")
completed in October 1995. Clinical trials of the Company's principal product
under development, EchoGen(R) Emulsion, began in January 1994. The Company
currently has on file for EchoGen a New Drug Application ("NDA") with the U.S.
Food and Drug Administration ("FDA") and a Marketing Authorization Application
("MAA") with the European Medicines Evaluation Agency ("EMEA").

         In February 1998, the Company received an action letter from the FDA
which indicated that the review of the EchoGen NDA was completed and the
application is inadequate for approval, citing certain deficiencies in the
application. The Company is in the process of preparing an amendment to the NDA
to address the deficiencies. The Company is exchanging information with the FDA
and, based on communications to date, believes an amendment can be prepared
that will be responsive to the issues raised in the FDA action letter. Once the
Company has filed the amendment with the FDA, the agency has up to 180 days to
review the amendment. Accordingly, once the FDA review is completed, the 
Company expects that the agency will be in a position to issue another action 
letter.

         In March 1998, the Committee for Proprietary Medicinal Products
("CPMP") issued a positive opinion on EchoGen for use in patients with suspected
or established cardiovascular disease. The CPMP is the scientific review
committee of the EMEA and makes its recommendations to the EMEA. The next step
following the positive opinion is expected to be the issuance of a marketing
authorization by the European Commission, which covers the 15 member states of
the European Union, which are the United Kingdom, Ireland, France, Germany,
Italy, Spain, Portugal, Sweden, Finland, Denmark, Belgium, Luxembourg, the
Netherlands, Greece and Austria.

         The Company will not be able to commence sales of EchoGen in the U.S.
or various international markets unless and until it receives the appropriate
regulatory approvals. Through March 31, 1998, all of the Company's revenues have
been derived from agreements with third parties for the collaborative
development of EchoGen worldwide.

         In May 1996, the Company formed a strategic alliance with Abbott
Laboratories ("Abbott") for marketing and selling EchoGen in the U.S. Under the
agreement, Abbott agreed to pay the Company an aggregate of $31.0 million in
up-front, clinical support and milestone payments, of which $24.0 million has
been paid as of March 31, 1998. In addition, Abbott purchased in May 1996, for
$4.0 million, warrants to acquire 500,000 shares of common stock of the Company.
The warrants are exercisable over five years at $16.00 per share. In October
1996, the Company and Abbott entered into an agreement expanding Abbott's
territory to include Europe, Latin America, Canada, Middle East, Africa and
certain Asia/Pacific countries. Under the October 1996 agreement, Abbott has
agreed to pay the Company $34.6 million in license and milestone payments, a
portion of which will be credited against future royalties once EchoGen is
approved for commercial sale. As of March 31, 1998, $9.2 million has been paid
to the Company by Abbott under the October 1996 agreement of which $4.2 million
is creditable against future royalties.

         The Company has granted Daiichi Pharmaceutical Co., Ltd. ("Daiichi"),
exclusive marketing and distribution rights to EchoGen in Japan and in certain
other countries in the Pacific Rim. As of March 31, 1998, Daiichi has paid the
Company option, license and milestone fees totaling $12.8 million.

         The Company's results of operations have varied and will continue to
vary significantly from quarter to quarter and depend on, among other factors,
the timing of fees and milestone payments made by collaborative partners, the
entering into product license agreements by the Company and the timing and costs
of the clinical trials conducted by the Company. The Company's current
collaborative partners can terminate their agreements on short notice, and there
can be no assurance that the Company will receive any additional funding or
milestone payments. 


                                       7


<PAGE>   8
RESULTS OF OPERATIONS

         Revenue from collaborative agreements decreased to $1.7 million for the
three months ended March 31, 1998 compared with $5.1 million for the three
months ended March 31, 1997. The revenue in the current period represents a
regular quarterly payment from Abbott of $1.0 million, as well as a milestone
payment from Abbott of $0.7 million. The revenue in the prior period represents
$4.7 million and $0.4 million of payments under the license agreements with
Abbott and Daiichi, respectively.

         Research and development expenses increased to $3.6 million for the
three months ended March 31, 1998 compared with $2.6 million for the three
months ended March 31, 1997, primarily due to ongoing clinical trials
investigating additional indications for EchoGen, costs related to supporting
the regulatory approval process in the U.S. and Europe, and development of new
products, offset in part by $0.6 million of clinical development costs
reimbursed by Abbott.

         General and administrative expenses increased to $1.7 million for the
three months ended March 31, 1998 compared with $1.2 million for the three
months ended March 31, 1997. The increase in 1998 reflected an increase in the
costs of filing, prosecuting and protecting patents and to a lesser extent,
increases in marketing and administrative personnel.

         The Company anticipates total operating expenses will increase in
future quarters due to ongoing and planned clinical trials to study additional
indications for EchoGen and due to higher marketing and administrative expenses
as the Company continues to prepare for commercialization of EchoGen. The
Company may also incur significant expenses relating to legal matters - see
"Legal Proceedings." In addition, revenues in future quarters will be primarily
dependent upon the timing of certain regulatory milestones.

         Interest income increased to $294,000 for the three months ended March
31, 1998 as compared to $250,000 for the three months ended March 31, 1997,
primarily reflecting a slightly higher rate of return on invested cash in the
first quarter 1998.

LIQUIDITY AND CAPITAL RESOURCES

         The Company has historically financed its operations with payments from
collaborative agreements, proceeds from equity financings and a bank line of
credit. At March 31, 1998, the Company had cash, cash equivalents and marketable
securities of $23.6 million, compared to $26.6 million at December 31, 1997. The
decrease was due primarily to the net loss reported in the first quarter.

         In August 1997, the Company renewed a loan agreement with Silicon
Valley Bank which provides for a $5.0 million revolving line of credit facility,
which bears interest at the prime rate plus 1.0% per annum. At March 31, 1998
there was $5.0 million outstanding under the line of credit. The line of credit
expires in August 1998 and is secured by the tangible assets of the Company. The
Company is required to maintain certain minimum balances of cash and marketable
securities in order to borrow under the line of credit.

         The Company expects that its cash needs will increase significantly in
future periods due to pending and planned clinical trials and higher
administrative and marketing expenses as the Company prepares for
commercialization of EchoGen. The Company estimates that existing cash, cash
equivalents and marketable securities will be sufficient to meet the Company's
capital requirements for at least the next 12 months. The Company's future
capital requirements will, however, depend on many factors, including the time
and costs required to gain regulatory approvals, the progress of the Company's
research and development programs, clinical trials and the ability of the
Company to obtain and retain continued funding from third parties under
collaborative agreements, the costs of filing, prosecuting and enforcing
patents, patent applications, patent claims and trademarks, the costs of
marketing and distribution, the status of competing products and the market
acceptance of the Company's products, if and when approved. The Company may have
to raise substantial additional funds to complete development of any product or
to commercialize any products if and when approved by the FDA. There can be no
assurance that additional financing will be available on acceptable terms, if at
all.


                                       8


<PAGE>   9
YEAR 2000 COMPLIANCE

         During 1997 the Company completed a comprehensive review of software
applications used in critical business processes. The Company has determined
that all of its critical business systems are year 2000 compliant. There is no
guarantee that the systems of the Company's collaborative partners or
significant vendors will be year 2000 compliant. If the Company's collaborative
partners or significant vendors are not year 2000 compliant, this could have an
adverse effect on the ability of collaborative partners or vendors to satisfy
their obligations to the Company or for the Company to electronically
communicate with such parties.

FORWARD-LOOKING STATEMENTS

         This Report contains certain forward-looking statements within the
meaning of Section 27A of the Securities Act of 1933, as amended, and Section
21E of the Securities Exchange Act of 1934, as amended, and the Company intends
that such forward-looking statements be subject to the safe harbors created
thereby. Examples of these forward-looking statements include, but are not
limited to, (i) the progress and results of clinical trials, (ii) future
marketing approvals, (iii) the anticipated outcome or financial impact of
litigation, (iv) future product revenues and expenses, and (v) the future uses
of capital and financial needs of the Company. While these statements made by
the Company are based on management's current beliefs and judgment, they are
subject to risks and uncertainties that could cause actual results to vary.

         In evaluating such statements, stockholders and investors should
specifically consider a number of factors and assumptions, including those
discussed in the text and the financial statements and their accompanying
footnotes in this Report and the risk factors detailed from time to time in the
Company's filings with the Securities and Exchange Commission. As discussed in
the Company's annual report on Form 10-K for the year ended December 31, 1997,
actual results could differ materially from those projected in the
forward-looking statements as a result of the following factors, among others:
uncertainty of governmental regulatory requirements; unproven safety and
efficacy; uncertainty of clinical trials; history of operating losses;
uncertainty of future financial results; uncertainty of market acceptance;
future capital requirements and uncertainty of additional funding; dependence on
third parties for funding, clinical development and distribution; dependence on
patents and proprietary rights; competition and risk of technological
obsolescence; limited manufacturing experience; dependence on limited contract
manufacturers and suppliers; lack of marketing and sales experience; and
limitations on third-party reimbursement.


                                       9


<PAGE>   10
PART II. OTHER INFORMATION

ITEM 1.  LEGAL PROCEEDINGS

         On August 1, 1997, a lawsuit was filed in the U.S. District Court for
the District of Columbia by Molecular Biosystems, Inc. ("MBI") and Mallinckrodt,
Inc. against the Company, Nycomed Imaging A.S. ("Nycomed"), ImaRx Pharmaceutical
Corporation, DuPont Merck and Bracco International BV. The suit alleged that
certain of the Company's ultrasound contrast agent patents were invalid and that
the Company had made certain false public representations about MBI and a
proposed MBI product. On September 3, 1997, Nycomed filed a cross-claim against
the Company in the above action, alleging that a Nycomed patent was entitled to
priority over one of the SONUS patents and that the SONUS patent was invalid.
The Company along with several other co-defendants moved to dismiss the lawsuit,
and on January 5, 1998, the District Court of the District of Columbia dismissed
the lawsuit filed by MBI and the cross-claim filed by Nycomed.

         On January 7, 1998, the Company announced that it had filed a patent
infringement action in the U.S. District Court in Seattle, Washington, against
MBI and Mallinckrodt, Inc. The suit alleges that one of MBI's ultrasound
contrast product agents infringes one or more of the Company's patents. MBI has
filed counterclaims alleging that the patents asserted by SONUS are invalid and
not infringed, and that SONUS has made false public statements and engaged in
other actions intended to damage MBI and one of its ultrasound contrast agents.
A trial date has been set for this lawsuit in August 1999.

         In addition, the patents in this lawsuit are the subject of
re-examination by the U.S. Patent and Trademark Office. The outcome of the
re-examination may have an impact on the above patent infringement action.

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

         The Company's Annual Meeting of Stockholders was held on April 30,
1998. At the Annual Meeting there were three matters submitted to a vote of
security holders. Proxies were solicited pursuant to Section 14(a) of the
Securities and Exchange Commission adopted pursuant thereto. There was no
solicitation in opposition to management's nominees as listed in the proxy
statement. Each director nominated and proposed submitted to a vote passed and
the voting outcome of each proposal is as follows:

1.       Election of the following four (4) directors to serve until the next
         annual meeting of stockholders or until their successors are elected
         and have qualified:


<TABLE>
<CAPTION>
         Nominee                            For               Abstain
         -------                            ---               -------
<S>                                         <C>               <C>    
         Steven C. Quay, M.D., Ph.D.        7,353,690         291,525
         Dwight Winstead                    7,353,920         291,295
         Harry A. Shoff                     7,353,878         291,337
         George W. Dunbar, Jr.              7,353,840         291,375
</TABLE>


2.       Approval of an amendment to the Company's Incentive Stock Option,
         Nonqualified Stock Option and Restricted Stock Purchase Plan -- 1991 to
         increase the number of shares subject thereto to a total of 1,900,000:

         For: 7,101,466    Against: 488,829          Abstain: 17,733

3.       Ratification of Ernst & Young LLP as independent auditors of the
         Company for the fiscal year ending December 31, 1998:

         For: 7,624,530    Against: 7,510            Abstain: 13,175


                                       10


<PAGE>   11
ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K

         (a)      EXHIBITS

                  Number   Description
                  ------   -----------  

                  10.29    Commercial Supply Agreement, dated March 6, 1998
                           (portions omitted pursuant to Rule 24B-2).

                  11.1     Computation of net income (loss) per share

                  27.1     Financial Data Schedule

         (b)      REPORTS ON FORM 8-K

                  The Company filed the following report on Form 8-K during the
                  quarter ended March 31, 1998:

                  1.  The Registrant filed a report on Form 8-K on March 13,
                      1998 in connection with the announcement of the FDA
                      requesting additional information regarding the EchoGen
                      NDA review and the announcement of the March meeting of
                      the Committee for Proprietary Medicine Products to review
                      the EchoGen Medical Marketing Application.

ITEMS 2, 3 AND 5 ARE NOT APPLICABLE AND HAVE BEEN OMITTED.


                                       11


<PAGE>   12
SIGNATURES


In accordance with the requirements of the Exchange Act, the registrant caused
this report to be signed on its behalf by the undersigned, thereunto duly
authorized.

                                SONUS PHARMACEUTICALS, INC.

Date:    May 7, 1998            By: /s/  Gregory Sessler
                                    --------------------
                                    Gregory Sessler
                                    Chief Financial Officer (Principal
                                    Financial and Accounting Officer)
                                    and Assistant Secretary


                                       12


<PAGE>   13
                                 EXHIBIT INDEX

           Number     Description
           ------     -----------

           10.29      Commercial Supply Agreement, dated March 6, 1998
                     (portions omitted pursuant to Rule 24B-2).

           11.1       Computation of net income (loss) per share

           27.1       Financial Data Schedule



<PAGE>   1
                           COMMERCIAL SUPPLY AGREEMENT

THIS AGREEMENT is made and entered into as of this day of March 6, 1998, by and
between SONUS PHARMACEUTICALS, INC., a Delaware corporation ("SONUS") and * .

RECITALS:

WHEREAS, * in the business of, among other things, fluorochemical
research and development, scale-up, bulk manufacturing and marketing of neat
fluorochemicals, * and *; and

WHEREAS, SONUS desires to have * supply, in bulk, neat medical grade
*, in accordance with specifications shown in Schedule 1, and to author Drug
Master File(s) ("DMF(s)") for * and *, for the development of and use in the
Product (as hereinafter defined) to be developed by SONUS;

NOW, THEREFORE, in consideration of the foregoing recitals, the mutual covenants
hereinafter set forth, and other good and valuable consideration, the receipt
and sufficiency of which are hereby acknowledged, SONUS and * do
hereby agree as follows:

        1.      DEFINITIONS

1.1     The following capitalized terms shall have the respective meanings set
        forth below for purposes of this Agreement.

1.2     "Affiliate" shall mean a corporation or business entity that directly or
        indirectly is controlled by, controls, or is under common control with a
        party to this agreement. For this purpose, the meaning of the work
        "control" shall be ownership of more than fifty percent (50%) of the
        voting shares or interest in the respective corporation or business
        entity or ownership of the maximum amount of the voting share or
        interest in the respective corporation or business entity permitted by
        law in a particular country.

1.3     "Approval Date" shall mean that date on which SONUS receives from the
        U.S. FDA final approval of its new drug application (NDA) for the
        Product.

1.4     "Confidential Information" shall have the meaning assigned to such term
        in Section 6.1 hereof. 

Page 1                                                 Initials:  *
* Confidential portions omitted and filed              Initials:  SONUS
  separately with the Commission.


<PAGE>   2
1.5     "Contract Year" shall mean each twelve (12) month period during the term
        of this Agreement commencing upon the first approval date by the Food
        and Drug Administration of the Product for use in the Field.

1.7     "Research and Development Year" shall mean each twelve (12) month
        period, or partial year before approval, immediately following execution
        of the "Commercial Supply Agreement" and until commencement of Contract
        Year one.

1.8     "Field" shall mean those human or animal pharmaceutical applications or
        treatments involving * or * used in diagnostic ultrasound imaging. The
        Field shall include, without limitation, topical, dermal, epidermal,
        injectable, transdermal, intravital or nasal administration of any
        Product.

1.9     "*" shall mean *, purified as * medical grade, which shall
        meet or exceed the minimum specifications set forth on Schedule 1
        hereto, and which shall be used by SONUS and/or other SONUS developers
        for the development, manufacture, sale and distribution of the Products.

1.10    "*" shall mean *, purified as * medical grade, which shall
        meet or exceed the minimum specifications set forth on Schedule 1
        hereto, and which shall be used by SONUS and/or other SONUS developers
        for the development, manufacture, sale and distribution of the Products.

1.11    "Patent Estate" shall mean those valid under law patents issued to SONUS
        as specified on Schedule 5 attached hereto.

1.12    "Product or Products" shall mean any one or more commercial products
        developed and manufactured by SONUS and/or SONUS developers, for
        application in the Field and containing * or * in any form, quantity or
        developed or purified state.

1.13    "Third Party" shall mean any person or entity other than SONUS,
        * or their Affiliates.

1.14    "SONUS" shall include SONUS Pharmaceuticals, Inc., its Affiliates and
        distributors.

1.15    "Excess Purchases" Any purchase of product by SONUS from * in
        contract years 1 of * in contract year 2, any purchase of product by
        SONUS from * in contract years 3,4 of * per contract year and
        * in contract year 5. 

Page 2                                                  Initials:  *
* Confidential portions omitted and filed               Initials:  SONUS
  separately with the Commission.


<PAGE>   3
2.      SUPPLY AND PURCHASE OF * AND *

2.1     Obligations of SONUS.

(a) SONUS hereby agrees that it will use its commercially reasonable best
efforts to attempt to obtain approval of a new drug application ("NDA") for one
or more of the Product(s) in the United States from the Food and Drug
Administration ("FDA") of the United States government within (7) years of the
date of the last signing party to this agreement.

(b) SONUS hereby agrees that, commencing upon the Research and Development Year
and/or the first Contract Year, as applicable and continuing during the term
hereof, SONUS and its Affiliates and distributors shall purchase from * not less
than the following amount of *:

Contract Year 1                                                         *
Contract Year 2                                                         *
Contract Year 3                                                         *
Contract Year 4                                                         *
Contract Year 5            and each subsequent year                     *

(a) SONUS hereby agrees that commencing in Contract Year three to negotiate in
good faith for * to provide SONUS with up to *, or minimums as above, whichever
is greater, of SONUS' world wide requirements of * and * beginning in contract
year four for the remaining term of the Agreement. * must prove to the
reasonable satisfaction of SONUS that it is a reliable supplier of * and/or *
conforming to the Specifications during R&D and Contract Years one and two per
Section 2.2 of the Agreement for this obligation to apply. However, in any given
contract year during contract year 1 through 5, * of the excess purchases shall
be applied as a reduction to the remaining contract years minimum purchases of
product, said reduction to be applied to the first, most distant of the 5
contract years minimum purchases to which minimum purchases apply.


2.2     Supply Obligation.

(a) * hereby agrees that, during the term hereof, it shall utilize its best
efforts at its own expense to maintain capacity to supply, at all times, * of
the annual forecasted volume requirements of SONUS; as provided for in Section
2.5, Estimates and Orders.


Page 3                                                   Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   4
(b) * agrees to hold, at the end of any calendar quarter commencing at the
beginning of the first Contract Year, a minimum of six (6) months supply of
medical grade * as specified in Schedule 4. SONUS agrees that it will purchase
all such inventories held by * within twelve (12) months of the inventory report
date, as set forth in SECTION 2.5 Estimates and Orders, or at the termination of
this agreement, whichever is sooner; provided that such inventories have * shelf
life and are within specification. The parties agree to consult regularly on the
adequacy of such minimum supply of *. * agrees to provide a copy of Schedule 4
to SONUS at least quarterly and * warrants that it has, in fact, the indicated
quantity of * in Inventory.

(c) * agrees to utilize its commercially reasonable best efforts to * and to
modify its DMF or prepare new DMF to * manufactured *. * will advise SONUS of
its plan and activities, including an estimate of time necessary to *. * agrees
to utilize its best efforts, including the procurement of increased quantities
of raw materials to make * in order to insure an uninterrupted supply of * to
SONUS * and to supply * in accordance with minimum supply levels set forth in
Paragraph 2.2(b), above. SONUS and * shall consult upon the amounts of raw
materials * shall use to make * and * for inventory during the changeover * and
SONUS shall purchase all of * * and said raw materials used to in making *
within 90 days after SONUS' complete conversion to *.

(d) * will produce * under DMF(s) during the term hereof. Said DMF(s) will
provide adequate detail on the facilities, purification, stability and quality
control processes * in accordance with current Good Manufacturing Practices
("GMP") and all applicable FDA and similar foreign regulations. * agrees to
provide authorization for the FDA to review the DMF(s) directly or to refer to
the DMF(s) during its review of any regulatory investigation of SONUS; or the
review of any submission made by SONUS. * shall provide a copy of the DMF(s) to
SONUS for review and a copy of each update to the DMF(s) prior to filing such
update with the FDA.

Page 4                                                   Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   5
Further, during the term hereof, should * DMF(s) be determined by the FDA to
not comply with its guidelines and regulations or if * proposes to make a change
in the DMF(s) or in the underlying process, * will notify SONUS. * will provide
SONUS with a summary of information relevant to any noncompliance or in support
of any proposed process or DMF(s) change, and SONUS will have 90 days to
evaluate and notify * that SONUS believes the noncompliance or change to be
significant. * will increase minimum inventory to an agreed upon level to ensure
no interruptions to SONUS in manufacturing of the Product. SONUS may engage a
Third Party consultant, to review the DMF(s) and recommend changes to the DMF(s)
for compliance with FDA guidelines or evaluate the * proposed change for
compliance with the FDA requirements, respectively. FDA is the final authority
and * agrees to use its best efforts to fully respond to FDA all requirements in
a timely fashion in order to bring its DMF(s) into compliance.

(e) In the event that SONUS or SONUS designate files foreign equivalents of
NDAs in countries outside the United States, then * will utilize its
commercially reasonable best efforts to file the appropriate documentation
regarding * supply in the same geographic territories in support of the
development efforts of SONUS. SONUS shall reimburse * for its reasonable costs
in connection with such efforts as mutually agreed upon by SONUS and *. Any
charges to SONUS shall be paid within thirty (30) days, net invoice amount. No
additional work shall be undertaken by * in writing as to the scope of the
additional work and the amounts to be paid by SONUS.

(f) * acknowledges that SONUS has represented that it is the holder of certain
patents directed to biocompatible ultrasound contrast media and methods of use
of said media and methods of use of said media comprising certain medical grade
fluorocarbon gases and gaseous precursors as specified in the SONUS Patent
Estate attached hereto as Schedule 5. So long as the minimums in paragraph
2.1(b) are met, * agrees that it will not make or use, nor knowingly sell, any *
to anyone other than SONUS for use in the Field without the express written
permission of SONUS.

(g) * acknowledges that no license is granted to * under any SONUS rights for *
manufacture, use or sale of * to Third Parties in the Field, or otherwise.

Page 5                                                   Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.

<PAGE>   6
2.3 Acceptance of *.

(a) Each shipment of * shall be weighed within 3 days of receipt by SONUS or
SONUS designate to confirm the quantity of * received. If there is a weight
discrepancy, SONUS shall promptly notify * and within 10 days, SONUS and * will
attempt to amicably resolve the cause of the discrepancy and the quantity that
SONUS will pay for. If the parties are unable to resolve any differences
concerning delivered quantities, the issue shall be resolved by arbitration as
set forth in Sections 9.1 and 9.2. It is agreed in paragraph 3.1 that the price
is FOB *, therefore any losses incurred in shipment (other than leaky valves or
defective shipment cylinders) are the responsibility of SONUS. Each shipment of
* supplied by * to SONUS hereunder shall conform to the specifications therefore
as set forth on Schedule 1 hereto. The parties may mutually agree to amend such
specifications, as necessary from time to time, provided that if any such
amendment shall materially affect * cost or timing of production, the parties
shall negotiate in good faith to amend the pricing or delivery terms
accordingly. If the parties are unable to resolve any differences concerning
pricing and/or delivery in this matter, the issue shall be resolved by
arbitration as set forth in Sections 9.1 and 9.2. Each such shipment shall be in
accordance with the required methods of analysis applicable *, and within the
guidelines of any applicable federal, state or local law, rule or regulation. *
shall send to SONUS with each such shipment a Certificate of Analysis specifying
the results of each analytical test required to show conformance of such
shipment with such specifications. The figures set forth in the certificate of
Analysis shall be accepted as accurate for the purposes of this Agreement unless
SONUS, within thirty (30) days of the receipt of such shipment, notifies * in
writing that it has analyzed such shipment in accordance with such methods of
analysis and has determined that such shipment does not conform to such
specifications.

(b) If it is determined that a lot of * does not conform to the applicable
specifications set forth on Schedule 1 hereto, * shall replace, at * expense,
such lot with a substitute lot which meets such specifications within thirty
(30) days from the date such nonconforming shipment is determined not to meet
the specifications therefore by the parties hereto. The nonconforming shipment
shall be returned at * expense by SONUS to * upon final determination in
accordance with Section 2.3(a) above that it does not meet the specifications
therefore.

Page 6                                                   Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   7
(c) The parties hereto agree that the supply of * by * hereunder shall be
subject to and governed by the terms and conditions hereof. None of the terms
and conditions set forth on any purchase or order form, invoice or like document
shall change, add to or modify the provisions of this Agreement, unless mutually
agreed to by the parties in writing. To the extent there shall exist any
inconsistency or additional terms between the terms and conditions of such
purchase or order form, invoice or like document and this Agreement, and there
is no written mutual agreement supporting such inconsistency or additional terms
then the terms and conditions of this Agreement shall control to such extent.

(d) * represents and warrants that each shipment * supplied pursuant to this
Agreement shall meet the specifications for * adopted hereunder and shall be
manufactured in accordance with current GMP applicable to the manufacture of
such bulk chemicals and all applicable laws, rules or regulations, as specified
by the United States Food and Drug Administration.

(e) * and SONUS each warrant that they shall individually comply with all
applicable laws, rules and regulations governing the transportation of hazardous
materials, occupational safety and health laws, and waste disposal laws with
respect to the handling of *.

(f) SONUS or SONUS' representatives shall have the right, upon reasonable
written notice to * but not more than twice per year to conduct a quality
assurance audit and inspection of * records including the DMF(s) and production
facility relating to the production and manufacture of *. Such audit shall focus
on a review of FDA compliance with applicable laws and regulations relating to
the manufacture of *. SONUS agrees to perform such audit during normal business
hours and to conduct the audit at its own expense. SONUS will issue a report
that will summarize * overall compliance and denote any recommended actions
where * is found deficient. * will have 30 days from the date of issuance of the
report to discuss the deficiencies and recommended actions with SONUS and to
initiate an agreed upon action plan.

Page 7                                                   Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   8
2.4      Warranty.

* warrants the manufacturing or sale of the Product(s) sold and delivered
hereunder will not infringe any U.S. Patent, but does not warrant against such
infringement by reason of the use of the Product alone, or in combination with
other goods, or in the operation of any process or use. SONUS agrees to
indemnify and hold * harmless against any and all claims, costs, or causes of
action which may arise out of the use of the Product(s) alone or in combination
with other goods. * further warrants that the shipments * supplied to SONUS
under this Agreement shall conform to the descriptions of Section 2.3 at the
time of shipment and that * shall have good and marketable title to transfer
same, free of any and all encumbrances. However, SONUS shall have the ability to
conduct its own analysis on each shipment of * received from * to check for
conformance with the specifications set forth on Schedule 1. * makes no
representation regarding any ingredient, chemical or constituent of a shipment
of * that is not specified in the specifications set forth in Schedule 1 as
being an impermissible ingredient, chemical or constituent of * or impermissible
concentration of any of the foregoing ("Unspecified Constituents"). SONUS agrees
to assume all responsibility for Unspecified Constituents and the biological
consequences thereof in the medical applications for any Unspecified
Constituents of the * by SONUS unless such unspecified constituent were due to *
failure to manufacture * in compliance with section 2.2d. SONUS shall bear the
burden of proof that an Unspecified Constituent was present due to * failure to
manufacture the * in compliance with 2.2 (d). With regard to the specifications
set forth in Schedule 1 and the specification's applicability to the medical
applications of SONUS, SONUS agrees and acknowledges that * does not have
expertise in that field and that SONUS does have expertise in that field, and
SONUS shall be solely responsible for the suitability of * and the specification
for the medical application(s) that SONUS contemplates under this Supply
Agreement. * MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, IN FACT OR BY LAW,
INCLUDING WITHOUT LIMITATION, ANY IMPLIED WARRANTY OF MERCHANTABLITY OR FITNESS
FOR A PARTICULAR PURPOSE.

Page 8                                                   Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   9
2.5      Estimates and Orders.

(a) (1) SONUS shall, within sixty (60) days after execution of the commercial
supply agreement for any Product, provide * with a written estimate of the
quarterly purchase of * by SONUS for the first year following the anticipated
NDA approval date; per the order forecast, Schedule 3, attached.

(2)* shall, within sixty (60) days following receipt of Schedule 3, inform SONUS
as to its anticipated capacity for supplying * to SONUS, including volumes and
lead times, and shall update such information when its actual capacity becomes
known.

(3) * acknowledges that such quantities shown on Schedule 3 are estimates only
and are not binding obligations on SONUS, subject to minimum purchase
obligations set forth in Paragraph 2.1(b) and agreement to pay for *
manufactured as a result of SONUS estimates and held by * for 12 months as
outlined in Paragraph 2.2(b). SONUS shall fully cooperate in the estimated
schedule and production for the commercial order(s) to be placed by SONUS in
anticipation of NDA approval for the Product.

(b) SONUS agrees to submit purchase orders at least 45 days prior to a requested
delivery date. * will ship the requested volume of * within forty five (45) days
of receipt, but * will use all reasonable efforts to ship the requested volume
of * within the periods requested in the purchase order therefore from SONUS,
provided that such orders are reasonably consistent with estimates previously
provided by SONUS. For purposes of the Section 2.5 (b), "reasonably consistent"
shall mean an order not in excess of one hundred fifty percent (150%) of the
relevant estimated volume, as shown on the forecast Schedule 3, in effect at the
time the purchase order is placed. SONUS may cancel any purchase order if *, as
requested, is not received within 45 days from *.

Page 9                                                   Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   10
2.6      Deliveries.

(a) All shipments of * from * hereunder shall be FOB * plant, freight collect or
third party billing to Sonus account. Each shipment of * shall be in accordance
with all applicable federal, state and local laws, rules and regulations with
respect to the packaging and shipping of *, including, without limitation, all
applicable environmental laws. * shall be shipped to SONUS or SONUS designate in
returnable * stainless steel containers or other such container sizes as the
parties may mutually agree, and in accordance with * DMF(s). As appropriate, *
will provide SONUS in advance of each shipment of * all necessary information
relating to such shipment, including, without limitation, the identity of the
carrier, flight number or truck number or similar information, scheduled arrival
date and time and shipment identification number.

(b) * shall have the responsibility of, and shall bear all costs incurred in
obtaining approval under or otherwise complying with all applicable laws, rules
and regulations related to the manufacture and supply of *, and SONUS shall
cooperate as reasonably required to obtain such approvals and such compliance.

3.  PRICE AND PAYMENT

3.1 Price. The price with respect to * shall be as set forth on Schedule 2
hereto, ("Price: Schedule"), and is the FOB Price * manufacturing facility.

3.2 Invoicing. * will submit an invoice after each shipment of * to SONUS
requesting payment for such shipment corresponding to a specific purchase order
submitted to * by SONUS. Such invoice shall reflect a total invoice price for
such shipment calculated pursuant to the pricing terms set forth on Price
Schedule 2.

3.3 Adjustments. SONUS may, after reviewing the invoice charges, contest in good
faith the charges or any aspect thereof by giving * written notice of the
objection within forty-five (45) days of receipt of such invoice from *. Within
forty-five (45) days from receipt of the notice from SONUS, the parties agree to
resolve any disagreements between the parties.

Page 10                                                  Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   11
3.4 Payments. Subject to the terms and provisions of Section 3 hereof, all
payments to * for * under this Agreement shall be made in U.S. dollars within
forty-five (45) days from the date of the invoice which invoices are dated by *,
with a three percent (3%) discount if paid within 10 days of the invoice date,
or upon such other terms as agreed upon in writing from time to time between the
parties.

3.5 Taxes. * shall bear and pay all federal, state and local taxes upon or
measured by its net income, and all franchise taxes based upon its corporate
existence, or its general corporate right to transact business. SONUS shall bear
any and all sales taxes due as a result of sales under this agreement.

4.  INDEMNIFICATIONS

4.1 By *. * hereby agrees to defend, indemnify, and hold SONUS harmless from any
loss, claim, action, damage, expense or liability, including defense costs and
attorney's fees, including but not limited to the costs of any environmental
sampling, cleanup and remediation resulting from or arising out of * manufacture
of * or of * handling or * disposing of any wastes relating thereto, or its
breach of any representation, warranty, covenant or obligation under this
Agreement.

4.2 BY SONUS. SONUS hereby agrees to indemnify and hold * harmless from any
loss, claim, action, damage, expense, or liability, including defense costs and
attorneys' fees, resulting from or arising out of SONUS' or its customers' or
agents' or end users' use * or sale or use of any Product or its breach of any
representation, warranty, covenant or obligation under this Agreement, other
than any loss claim, action, damage, expense or liability that results from the
manufacturing process of * by * or the adulteration of * by *. SONUS
acknowledges that there are hazards associated with the handling and use of *,
that it understands such hazards, and that it is the responsibility of SONUS to
warn and protect its employees and others exposed to such hazards through
storage, handling, and use *. * shall provide SONUS with copies of Material
Safety Data Sheets relating to * for SONUS to make the warnings set forth
therein, which may not be a comprehensive, all inclusive set of warnings, and
SONUS shall hold harmless, indemnify, and defend * from and against any loss,
cost, claim, action, expense, or liability, including, but not limited to
attorneys' fees incurred by * because such warnings or any other warnings
required by law or otherwise for the safe use, handling, and storage of * and
products containing * were not made.

Page 11                                                  Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   12
4.3 Conditions of Indemnity. The obligations and liabilities of either party
hereto with respect to claims resulting from the assertion of liability by the
other party or a Third Party shall be subject to the following terms and
conditions:

(a) The party seeking indemnification shall give prompt written notice to the
other party of any assertion that might give rise to a claim by the party
seeking indemnification against the other party based on the indemnity agreement
contained in Section 4.1 or 4.2 hereof, stating the nature and basis of said
claims and the amounts hereof, the extent known; provided, however, that the
failure to give such notice shall not reduce or eliminate the indemnifying
party's obligations hereunder unless the indemnifying party's shall have been
materially prejudiced by the failure to give such notice.

(b) In the event any action, suit or proceeding is brought against any party
hereto or any of its Affiliates with respect to which the other party may have
liability under the indemnity agreement contained in Section 4.1 or 4.2, such
other party may, at its option, elect to join or assume the defense of any such
action, suit or proceeding, subject to the reasonable approval of counsel by the
other party.

(c) The party seeking indemnification shall be kept fully informed of such
action, suit or proceeding at all stages thereof whether or not it is
represented by counsel, in circumstances involving multiple defendants and
rights of contribution, fees and expenses of counsel shall be apportioned in
proportion to the ultimate liability.

(d) The parties agree to render to each other such assistance as they may
reasonably require of each other in order to ensure the proper and adequate
defense of any such action, suit or proceeding, including making available to
each other and/or to each other's attorneys its books and records relating to
such proceedings or litigation and making individuals available for the giving
of testimony (including depositions). Out-of-pocket costs (but not salaries or
overhead attributable to employees of a party) shall be considered costs subject
to indemnification.

(e) Neither party shall make any settlement of claims without the written
consent of the other party, unless such settlements provide for a full and
unconditional release of all claims against the other party.

(f) IN NO EVENT SHALL EITHER PARTY BE LIABLE TO THE OTHER PARTY, IN CONTRACT OR
IN TORT, FOR INCIDENTAL, EXEMPLARY, PUNITIVE, SPECIAL OR CONSEQUENTIAL DAMAGES.

Page 12                                                  Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   13
4.4 Limit of Liability. No claim or liability of any kind with respect to
non-delivery of * shall be greater than the price payable hereunder for the *,
whichever is applicable, in respect to which such claim is made and SONUS' sole
and exclusive remedy (except for the remedy of termination for material breach)
for delivery of non-conforming *, whichever is applicable, shall be replacement
by * or a Third Party of a like quantity of conforming *, whichever is
applicable, at no additional cost to SONUS, as set forth in Section 2.3 (b).

4.5 SONUS Product Liability Coverage. So long as commercially practicable, SONUS
hereby agrees to have in effect at the time of regulatory approval of any
Product, and to maintain in effect for the duration of this Agreement, a
commercial general liability insurance policy or in combination with an excess
liability insurance policy, coverage to include products liability, a minimum of
$5,000,000 combined single limit per occurrence.

5.  FORCE MAJEURE

5.1 No liability to any party shall result from any delay in performance or
nonperformance directly or indirectly caused by circumstances beyond the control
of the party affected, including, but not limited to acts of God, fire,
explosion, flood, earthquake, governmental action (including but not limited to
laws, decrees, and regulations), acts of war or accident, so long as the
affected party shall use all reasonable efforts to correct or mitigate the
circumstances causing such delay in performance or such non performance.

Page 13                                                  Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   14
6.  CONFIDENTIALITY

6.1 All business and technical information, in writing and identified as
confidential at the time of disclosure, including, but not limited to, the
existence and terms of this Agreement, technical knowledge, specifications,
quality standards, formulae, instructions, procedures and manufacturing
processes (the "Confidential Information") which either party may disclose to
the other party or to any employee, agent, or representative of the other party,
shall be received, used and retained by such other party and its employees,
agents and representatives on a strictly confidential basis and, except as
expressly provided for herein or as required by applicable law, shall not be
disclosed to any, Third Party (except for disclosures required by applicable
law, including compliance with the disclosure requirements of applicable
securities laws) or in any way used by the recipient party other than for the
purposes set forth in this Agreement. The party receiving the Confidential
Information shall not disclose any such information to any person within its
organization who does not have a need to know, or to any Third Party without the
prior written consent of the disclosing party. Oral disclosures must be reduced
to writing, identified as confidential and delivered to the recipient party
within fifteen (15) days of initial disclosure to be accorded the benefits of
this section.

The term "Confidential Information" shall not include any information that:

(a) is in the public domain at the time of receipt by either party or which
comes into the public domain without breach of any obligation assumed hereunder,
or

(b) was known, and can be shown by clear and convincing evidence to have been
known by the receiving party at the time of receipt from the other party, or

(c) becomes known to the receiving party through a Third Party source whose
acquisition was independent of either party and not in breach of any obligation
of confidentiality under any agreement to which such Third Party was subject,
and the use of which is not subject to any other confidentiality agreement.

6.2 The obligations of confidentiality under this Section 6 shall remain in
effect during the term of and for a period of ten years from the date of
termination of this commercial supply agreement.

7.  NOTICES

7.1     All notices provided for in this Agreement shall be in writing and shall
        be given by registered mail, courier, or personal delivery addressed to
        the parties at the addresses listed below;

Page 14                                                  Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   15
If to SONUS:

SONUS Pharmaceuticals, Inc.
22026 20th Avenue, S.E., Suite 102
Bothell, Washington 98021
Attention:  Steven Quay, M.D, Ph.D
            President and Chief Executive Officer

If to *:

*
*
*
*
            *

A party may change its address for purposes of receiving notices by providing
written notice of such change to the other party. Notice shall be deemed to have
been given as of the date of receipt of the party receiving the notice.

8.  TERM AND TERMINATION

8.1 Term. This Agreement shall continue and remain in full force and effect,
unless terminated, for an initial term commencing on the date hereof and ending
five (5) years from the Approval Date ("Initial Term") unless the Approval Date
does not occur within seven (7) years of the date of this Agreement, in which
event this Agreement shall terminate seven (7) years after the date of this
Agreement. The Agreement shall remain in force after the Initial Term for
successive three (3) year periods unless and until one party gives to the other
party written notice of termination at least one hundred and eighty (180) days
prior to the expiration of the Initial Term or any successive three (3) year
period.

8.2 Termination. This Agreement may be terminated upon the occurrence of any of
the following:

(a) Either party's material breach of any term or obligation hereof, unless such
breach of any term or obligation is cured within ninety (90) days following
notice by the other party of its intention to terminate this Agreement due to
such breach or if the breach is of a nature that cannot be reasonably cured
within such period, unless the breaching party has taken all reasonable steps to
cure the breach within such periods and proceeds diligently to effect a cure as
soon thereafter as reasonably practicable but in any event within ninety (90)
days following the original notice;

Page 15                                                  Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   16
(b) The entry of an order for relief under the United States Bankruptcy Code (or
any corresponding remedy under successor laws) against a party; the filing of a
voluntary petition by a party under any bankruptcy, insolvency or similar law,
or the filing of an involuntary petition (which petition is not dismissed within
one hundred and twenty (120) days after filing); the appointment of a receiver
for party's business or property; a party's making of a general assignment for
the benefit of its creditors; or the liquidation or dissolution of a party.

8.3 Material Breach by *.

(a) In the event SONUS notifies * of termination per Paragraph 8.2(a) due to an
uncured * material breach, * will provide reasonable assistance as requested by
SONUS to establish an alternative viable source of * at no cost to SONUS.

(b) For purposes of Paragraph 8.3(a), assistance shall include teaching the
alternate source of supply for SONUS * the process for *, transfer of * DMF(s),
Test Methods, Standard Operating Procedures, and all other current documentation
necessary for the manufacture * and all equipment of * dedicated exclusively to
manufacturing of * at an agreed on reasonable price.

9.  ARBITRATION

9.1 In the event the parties are unable to resolve a disagreement concerning any
matter under this Agreement, either party by written notice to the other may
initiate arbitration proceedings to resolve the matter pursuant to Section 9.2.

9.2 Any controversy concerning the interpretation of this Agreement, or any
breach thereof, shall be settled by final and binding arbitration in accordance
with the then existing rules of the American Arbitration Association, and
judgment upon the award rendered by the arbitrator may be entered in any court
having jurisdiction over the party against which the award is entered (or the
ultimate parent of such party) thereof. The prevailing party in any such
arbitration as determined by the arbitrator shall be entitled to receive from
the other parties costs and expenses incurred in connection with the
arbitration, including reasonable attorneys' fees. The arbitration shall be
conducted in King County, Washington, if * initiates the process and * if SONUS
initiates the process. In any such arbitration the rights of the parties shall
be determined according to the law of Section 10 of this agreement (excluding
its or any other jurisdiction's choice of law principles). The parties hereto
agree that the service of any notice in the course of such arbitration at the
respective addresses as provided for in Section 7.1 shall be valid and binding.

Page 16                                                  Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   17
10.  GOVERNING LAW

10.1 This Agreement shall be governed as to validity, enforcement, construction,
effect and in all other respects, by the laws of the State of Washington.

11.  PROPRIETARY RIGHTS

11.1 Except as set forth herein, all right, title and interest in any
proprietary information in the possession of either party prior to the date of
this Agreement or developed solely by either party on or after the date of this
Agreement shall remain the sole property of that party and the other party shall
be subject to the confidentiality requirements contained herein with respect to
such information. Without limiting the generality of the foregoing, SONUS shall
retain the sole and exclusive title to the Product, together with all patents,
copyrights, trademarks and trade secrets relating thereto. Each Party shall have
a royalty-free, perpetual license to utilize and sublicense any jointly owned
information subject to the terms, conditions and limitations set forth in this
Agreement. Each party shall be free to utilize for any purpose information owned
solely by it, subject to the terms conditions and limitations set forth in this
Agreement. Anything herein to the contrary notwithstanding, SONUS shall own the
exclusive right, title and interest to any and all patents, proprietary
information or other rights included in the SONUS Patent Estate.

11.2 Each party shall be responsible for and bear the cost of pursuing patents
(both within the United States of America and worldwide) to protect intellectual
property owned by such party. In the event that any intellectual property is
owned jointly, either party may notify the other party in writing of the first
party's intent to apply for one or more patents covering such property. The
other party shall within thirty (30) days of such notice notify the first party
in writing whether the second party desires to join in such applications. If the
second party joins in such application, it shall be responsible for and pay
one-half of all costs incurred in obtaining such patent, including, but not
limited to attorneys' fees associated therewith, and shall timely execute any
and all documents necessary or desirable in connection with the application. If
the second party fails to elect or declines such invitation, title to the patent
or patents shall be issued solely in the name of the first party, and the second
party shall be deemed to have waived any and all rights in and to such property
and patents. Each party shall provide non monetary assistance when reasonably
required, to pursue all appropriate patents.


Page 17                                                  Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   18
11.3 All intellectual property developed exclusively by or purchased by either
party from any Third Party other than in conjunction with this project, is
excluded from the terms hereof.

11.4 The provisions of this Section shall survive the termination of this
agreement.

12.  SEVERABILITY

12.1 If any provision of this Agreement is held to be unenforceable or illegal,
the other provisions of this Agreement shall not be affected by any such holding
and shall remain in full force and effect. In such event the parties shall use
all reasonable efforts to replace any such unenforceable or illegal provision
with a provision reflecting as nearly as possible the intent, purpose, and
economic effect of such provision.

13.  ASSIGNMENT, FDA REVIEW REQUEST

13.1 * shall not, without the prior written consent of SONUS, sell, assign,
transfer, encumber, or otherwise dispose of its interest in this
Agreement, whether by merger, consolidation, sale of stock, sale of assets or
otherwise, and any such prohibited transfer, if made, shall be void and without
force or effect. SONUS shall not without the prior written consent of * , sell,
assign, transfer, encumber or otherwise dispose of its interests in this
Agreement, except in connection with any merger, consolidation, sale of
stock or sale of assets of SONUS as to which this Agreement relates, in which
case no such consent shall be required. Any permitted assignee shall fully
assume the obligations of the assigning party hereunder, but the assigning
entity shall nonetheless remain liable unless the parties agree otherwise.

13.2 Notwithstanding paragraph 13.1, * , shall have the right to sell
assign or transfer this Agreement and all or part of its medical business,
together with the right, title and interest in this Agreement and * DMF(s),
to an as yet unnamed successor corporation, partnership or other organization,
comprised of: * ; or any combination of the above and/or trusts set up by the
above. Said sell or transfer may occur at any time during the term of this
Agreement, and any such assignee shall acquire all of the rights and assume
all of the obligations of * , under this Agreement.

13.3 If requested by the FDA, either party may provide a copy of this Agreement
to the FDA. In such event, the party providing the copy shall immediately notify
the other party that a copy has been or will be provided to the FDA.

Page 18                                                  Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   19
14.  SURVIVAL

14.1 The provisions of Sections 2.2(f), 4.1, 4.2, 4.3, 4.4, 6.1, 6.2, 8.3, 9 and
11 shall survive termination or expiration of this Agreement (as the case may
be) and shall remain in full force and effect.

15.  CAPTIONS

15.1 The captions of this agreement are solely for the convenience of reference
and shall not affect its interpretation.

16.  ENTIRE AGREEMENT

16.1 This Agreement and the Schedules hereto represent the entire agreement
between the parties and supersedes all prior or contemporaneous oral or written
agreements of the parties. This Agreement may be modified, amended or changed
only by a written instrument signed by the parties except with respect to the
updates of Schedule 3 hereto to be provided by SONUS to * from time
to time as provided for in Section 2.5(a) hereof.

17. COUNTERPARTS

17.1 This Agreement may be executed in two or more counterparts, each of which
shall be deemed an original and all of which together shall constitute a single
agreement.

Page 19                                                  Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   20
IN WITNESS WHEREOF, the parties have caused this Agreement to be executed by
their duly authorized representatives on the date and year first written above.


SONUS PHARMACEUTICALS, INC.                                      *


By:            /S/ Steven C. Quay
               -------------------------------
Date:          March 27, 1998
Name:          Steven C. Quay, M.D., Ph.D.
Title:         President & Chief Executive Officer




By:                   *
               -------------------------------
Date:          March 6, 1998
Name:                 *
Title:         President

Page 20                                                  Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   21
                              PAGE 1 OF SCHEDULE 1


                              SPECIFICATIONS FOR *
                                 SPECIFICATION *



Page 21                                                  Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   22
                              PAGE 2 OF SCHEDULE 1


                               SPECIFICATION FOR *
                                 SPECIFICATION *


Page 22                                                  Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   23
                                PRICING SCHEDULE

                                        *
                                   (Proposed)


Volume Purchases


<TABLE>
<CAPTION>
      Contract Year                  Price per *                    Price per *
<S>                                  <C>                            <C>
            *                             *                              *
            *                             *                              *
            *                             *                              *
            *                             *                              *
</TABLE>


* will be shipped in * owned *. Containers not returned to * within 60 days
will be charged a container rental charge of * per month. Containers not
returned to * within 12 months will be invoiced to Sonus at * per container.
Sonus will use their best efforts not to contaminate or damage * shipping
containers.


                                                                         /  /97
                                                                     Schedule 3

QUARTERLY ESTIMATES OF * ORDERS




                                                                         /  /97
                                                                     Schedule 4

Page 23                                                  Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.


<PAGE>   24
                           INVENTORY CERTIFICATE FOR *
                                        *


Date
Previous six (6) months purchases
Month 1
Month 2
Month 3
Month 4
Month 5
Month 6
Total
Average of Total (divide by 6)



         I CERTIFY, that on the above shown date * met its Inventory
Requirements.


Name


                                                 Schedule 5

                                                 SONUS PATENT ESTATE

Page 24                                                  Initials: *
* Confidential portions omitted and filed                Initials: SONUS
  separately with the Commission.



<PAGE>   1
                                  EXHIBIT 11.1

                           SONUS PHARMACEUTICALS, INC.
                   COMPUTATION OF NET INCOME (LOSS) PER SHARE


<TABLE>
<CAPTION>
                                                 THREE MONTHS ENDED
                                                      MARCH 31,
                                            -----------------------------
BASIC EARNINGS PER SHARE:                      1998               1997
                                            -----------       -----------
<S>                                         <C>               <C>        
Net income (loss) ....................      $(3,266,692)      $ 1,356,187


Weighted average common shares .......        8,612,923         8,531,352


   Basic earnings per share ..........      $     (0.38)      $      0.16


DILUTED EARNINGS PER SHARE:


Net income (loss) ....................      $(3,266,692)      $ 1,356,187


Weighted average common shares - basic        8,612,923         8,531,352

Dilutive potential common shares .....               --           965,730
                                            -----------       -----------

   Total .............................        8,612,923         9,497,082
                                            ===========       ===========


   Diluted earnings per share ........      $     (0.38)      $      0.14
</TABLE>


                                       13


<TABLE> <S> <C>

<ARTICLE> 5
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                       5,154,194
<SECURITIES>                                18,466,433
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                            24,165,376
<PP&E>                                       3,686,985
<DEPRECIATION>                               1,938,173
<TOTAL-ASSETS>                              25,954,855
<CURRENT-LIABILITIES>                        9,233,571
<BONDS>                                              0
                                0
                                          0
<COMMON>                                    34,939,884
<OTHER-SE>                                (19,622,628)
<TOTAL-LIABILITY-AND-EQUITY>                25,954,855
<SALES>                                              0
<TOTAL-REVENUES>                             1,700,000
<CGS>                                                0
<TOTAL-COSTS>                                5,206,630
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                            (54,113)
<INCOME-PRETAX>                            (3,266,692)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                        (3,266,692)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                               (3,266,692)
<EPS-PRIMARY>                                   (0.38)<F1>
<EPS-DILUTED>                                   (0.38)
<FN>
<F1>FOR THE PURPOSE OF THIS FINANCIAL DATA SCHEDULE, PRIMARY IS BASIC
</FN>
        

</TABLE>


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