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:  0-28298
                                          
                                          
                                          
                             ONYX PHARMACEUTICALS, INC.
               (Exact name of registrant as specified in its charter)
                                          
DELAWARE                                          94-3154463
(State or other jurisdiction of                   (IRS Employer ID Number)
incorporation or organization)

                                3031 Research Drive
                            Richmond, California  94806
                      (Address of principal executive offices)
                                          
                                   (510) 222-9700
                (Registrant's telephone number including area code)
                                          
Check whether the issuer (1) filed all reports required to be filed by Section
13 or 15(d) of the Exchange Act during the past 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.  
          (XX)   Yes                    (   )   No

The number of outstanding shares of the registrant's Common Stock, $0.001 par
value, was 11,273,165 as of April 30, 1998.




                            ONYX PHARMACEUTICALS, INC.

                                        INDEX




PART I:  FINANCIAL INFORMATION
- ------------------------------

                                                                         PAGE
                                                                         ----
                                                                   
ITEM 1.  Financial Statements 

              Condensed balance sheets - March 31, 1998 and
              December 31, 1997                                             3

              Condensed statements of operations - three  months  
              ended March 31, 1998 and 1997                                 4

              Condensed statements of cash flows - three  months ended
              March 31, 1998 and 1997                                       5

              Notes to condensed financial statements                       6

ITEM 2.  Management's discussion and analysis of financial
         condition and results of operations                                8



PART II:  OTHER INFORMATION
- ---------------------------

ITEM 2.  Changes in Securities and Use of Proceeds                         12

ITEM 6.  Exhibits and Reports on Form 8-K                                  12

SIGNATURES                                                                 13

EXHIBIT INDEX                                                              14



                                       2



                            ONYX PHARMACEUTICALS, INC.

PART I:  FINANCIAL INFORMATION

ITEM 1:  FINANCIAL STATEMENTS

                              CONDENSED BALANCE SHEETS
                         (IN THOUSANDS, EXCEPT SHARE DATA)



                                                              March 31,     December 31,
                                                                1998            1997
                                                              ---------     ------------
                                                             (unaudited)
                                                                      
ASSETS
Current assets:
  Cash and cash equivalents                                     $35,153          $18,828
  Short-term investments                                          8,171           16,644
  Other current assets                                              562            1,002
                                                                -------          -------
      Total current assets                                       43,886           36,474

Property and equipment, net                                       4,284            4,562
Notes receivable from related parties                               774              812
Other assets                                                         30               10
                                                                -------          -------
TOTAL ASSETS                                                    $48,974          $41,858
                                                                -------          -------
                                                                -------          -------

LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Accounts payable                                              $   820          $ 1,319
  Accrued liabilities                                             2,179            1,731
  Accrued clinical trials and related expenses                    2,250            1,704
  Accrued compensation                                              750              496
  Deferred revenue                                                1,460            1,209
  Long-term debt, current portion                                 2,199            2,130
                                                                -------          -------
      Total current liabilities                                   9,658            8,589
Long-term debt, noncurrent portion                                4,030            4,336
Deferred rent                                                        92              112

Stockholders' equity:
  Preferred stock, $0.001 par value; 5,000,000 shares
  authorized; none issued and outstanding                             -                -           
  Common stock, $0.001 par value; 25,000,000 shares 
  authorized; 11,264,833 and 9,850,518 shares issued and 
  outstanding as of March 31, 1998 and December 31, 
  1997, respectively                                                 11               10          
  Additional paid-in capital                                     84,692           74,836
  Deferred compensation                                            (358)            (413)
  Accumulated deficit                                           (49,151)         (45,612)
                                                                -------          -------
     TOTAL STOCKHOLDERS' EQUITY                                  35,194           28,821
                                                                -------          -------
  TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY                    $48,974          $41,858
                                                                -------          -------
                                                                -------          -------

                                       See accompanying notes.

                                       3



                                       ONYX PHARMACEUTICALS, INC.

                                   CONDENSED STATEMENTS OF OPERATIONS
                                 (IN THOUSANDS EXCEPT PER SHARE AMOUNTS)
                                                (UNAUDITED)



                                                                   Three Months Ended
                                                                        March 31,
                                                                 ----------------------
                                                                 1998              1997
                                                                 ----              ----
                                                                           
Revenue: 
  Contract and other revenue ($2,934 and $1,845  
  from related parties for the three months ended 
  March 31, 1998 and 1997 respectively)                         $ 3,332          $ 2,152

Operating expenses:
  Research and development                                        6,065            3,877
  General and administrative                                      1,290            1,266
                                                                -------          -------

    Total operating expenses                                      7,355            5,143
                                                                -------          -------
Loss from operations                                             (4,023)          (2,991)

Interest income, net                                                484              498
                                                                -------          -------

Net loss                                                        $(3,539)         $(2,493)
                                                                -------          -------
                                                                -------          -------

Basic and diluted net loss per share                            $ (0.32)         $ (0.26)
                                                                -------          -------
                                                                -------          -------

Shares used in computing basic and diluted net loss per share    11,074            9,523
                                                                -------          -------
                                                                -------          -------

                                     See accompanying  notes.


                                       4



                            ONYX PHARMACEUTICALS, INC.

                         CONDENSED STATEMENTS OF CASH FLOW
                                 (IN THOUSANDS)
                                   (UNAUDITED)



                                                                   Three Months Ended
                                                                        March 31,
                                                                 ----------------------
                                                                 1998              1997
                                                                 ----              ----
                                                                          
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss                                                        $(3,539)        $ (2,493)
Adjustments to reconcile net loss to net cash used
  in operating activities:
    Depreciation and amortization                                   516              416
    Forgiveness of note receivable                                   30                -
    Amortization of deferred compensation                            55               55
    Changes in assets and liabilities:
      Other current assets                                          440             (154)
      Other assets                                                  (20)              53 
      Accounts payable                                             (499)             140
      Accrued clinical trials and related expenses                  546                -
      Accrued liabilities                                           448               (6)
      Accrued compensation                                          254              137
      Deferred revenue                                              251           (1,631)
      Deferred rent                                                 (20)             (99)
                                                                -------          -------
Net cash used in operating activities                            (1,538)          (3,582)
                                                                -------          -------

CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of short-term investments                              (6,171)         (26,829)
Sales and maturities of short-term investments                   14,644            4,071
Capital expenditures                                               (238)            (286)
Notes receivable from related parties                                 8             (180)
Proceeds from sale of fixed assets                                    -                -
                                                                -------          -------
Net cash provided by (used in) investing activities               8,243          (23,224)
                                                                -------          -------

CASH FLOWS FROM FINANCING ACTIVITIES:
Payments on long-term debt                                         (237)             (99)
Net proceeds from issuance of common stock                        9,857               26
Repurchase of common stock                                            -               (3)
                                                                -------          -------
Net cash provided by (used in) financing activities               9,620              (76)
                                                                -------          -------

Net increase (decrease) in cash and cash equivalents             16,325          (26,882)
Cash and cash equivalents at beginning of the period             18,828           36,258
                                                                -------          -------
Cash and cash equivalents at end of the period                  $35,153         $  9,376
                                                                -------          -------
                                                                -------          -------

                              See accompanying  notes.

                                       5



                            ONYX PHARMACEUTICALS, INC.

                     NOTES TO CONDENSED FINANCIAL STATEMENTS
                                 MARCH 31, 1998
                                  (UNAUDITED)

NOTE 1.  BASIS OF PRESENTATION

The accompanying unaudited condensed 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 by 
generally accepted accounting principles for complete financial statements.  
In the opinion of management, all adjustments (consisting of normal recurring 
accruals) considered necessary for a fair presentation have been included.

Operating results for the three months ended March 31, 1998 are not 
necessarily indicative of the results that may be expected for the year 
ending December 31, 1998.  For further information, refer to the financial 
statements and footnotes thereto for the year ended December 31, 1997  
included in the Onyx Pharmaceuticals, Inc. (the "Company" or "Onyx") Annual 
Report on Form 10-K.

NOTE  2.  MARKETABLE SECURITIES - AVAILABLE-FOR-SALE

The following is a summary of available-for-sale securities as of March 31, 
1998:



                                                          ESTIMATED
                                                          FAIR VALUE
                                                        (in thousands)
                                                        --------------
                                                     
     Cash equivalents:
       Money market funds                                   $35,152
       Cash                                                       1
                                                            -------
           Total cash and cash equivalents                  $35,153
                                                            -------
                                                            -------

     Short-term investments:
       U.S. corporate securities                             $7,168
       Foreign corporate securities                           1,003
                                                            -------
           Total available-for-sale securities/
             short-term investments                          $8,171
                                                            -------
                                                            -------


As of March 31, 1998, the difference between the fair value and the amortized 
cost of available-for-sale securities was insignificant.  The average 
portfolio maturity is approximately three months, and the contractual 
maturity of each of the investments does not exceed one and three-quarter 
years. 

NOTE 3.  LINE OF CREDIT

In March 1997, the Company entered into a $7 million line of credit 
arrangement which bears interest at prime plus 1%.   As of January 15, 1998, 
the Company can no longer draw on this line of credit arrangement.  As of 
March 31, 1998, $6,229,000 was outstanding on the line of credit at an 
interest rate of 9.5%. The Company is repaying the line in equal monthly 
payments of principal plus interest in order to repay the outstanding balance 
by January 15, 2001.  The line is secured by certain assets of the Company 
and contains covenants related to maintaining debt-to-equity ratios, tangible 
net worth minimums, cash and investment balances, as well as a restriction on 
paying dividends or repurchasing stock.


                                       6



                            ONYX PHARMACEUTICALS, INC.

NOTE 4.  SALE OF EQUITY SECURITIES

On January 12, 1998, the Company issued and sold 1,403,508 shares of its 
common stock at a purchase price of $7.125 per share in a private placement 
to two institutional investors.  The Company received aggregate proceeds of 
approximately $10,000,000 from the private placement.

                                       7




                            ONYX PHARMACEUTICALS, INC.

                       MANAGEMENT'S DISCUSSION AND ANALYSIS 
               OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

EXCEPT FOR THE HISTORICAL INFORMATION CONTAINED HEREIN, THIS OVERVIEW AND THE 
FOLLOWING DISCUSSION CONTAIN FORWARD-LOOKING STATEMENTS THAT INVOLVE RISKS 
AND UNCERTAINTIES.  THE COMPANY'S ACTUAL RESULTS COULD DIFFER MATERIALLY FROM 
THOSE DISCUSSED HERE.  FACTORS THAT COULD CAUSE OR CONTRIBUTE TO SUCH 
DIFFERENCES INCLUDE, BUT ARE NOT LIMITED TO, THOSE DISCUSSED IN THE ANNUAL 
REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 31, 1997.

OVERVIEW

Since its inception, Onyx Pharmaceuticals Inc. (the "Company" or "Onyx") has 
been engaged in the discovery and development of novel therapeutics including 
both small molecule drugs and therapeutic viruses which are based upon the 
genetics of human disease. The Company has initially chosen to focus its 
research in the area of cancer. The Company intends to pursue its therapeutic 
discovery programs independently and in collaboration with pharmaceutical 
companies, and to collaborate with such companies on the development and 
commercialization of any products which may result from the Company's 
discovery programs. The Company has entered into collaborative agreements 
with Bayer Corporation ("Bayer") in the area of ras oncogenes and Eli Lilly 
and Company ("Eli Lilly") on the function of the BRCA1 gene in breast cancer. 
The Company has also entered into two separate collaborative agreements with 
Warner-Lambert Company ("Warner-Lambert"), one in cell cycle mutations in 
cancer and a second pertaining to inflammation and autoimmunity.

The Company has not been profitable since inception and expects to incur 
substantial and increasing losses for the foreseeable future, primarily due 
to the expansion of its research and development programs, including 
preclinical studies and clinical trials in the p53 program. The Company 
expects that losses will fluctuate from quarter to quarter and that such 
fluctuations may be substantial. As of March 31, 1998, the Company's 
accumulated deficit was approximately $49.2 million. 

The Company's business is subject to significant risks, including the risks 
inherent in its research and development efforts, the results of the ONYX-015 
clinical trials, uncertainties associated with obtaining and enforcing 
patents, the lengthy and expensive regulatory approval process and 
competition from other products. The Company does not expect to generate 
revenues from the sale of proposed products in the foreseeable future. 


RESULTS OF OPERATIONS

THREE MONTHS ENDED MARCH 31, 1998 AND 1997.

REVENUE

Total revenue for the quarter ended March 31, 1998 of $3,332,000 was 
attributable to amounts earned for research performed under the Company's 
collaborations with Bayer for the ras program, Eli Lilly for the BRCA1 
program and Warner-Lambert for the cell cycle and inflammation programs.  
Revenue increased this quarter by $1,180,000 over the same period last year 
due primarily to revenue recorded for the inflammation program, including a 
$500,000 license fee.

                                       8



                            ONYX PHARMACEUTICALS, INC.

RESEARCH AND DEVELOPMENT EXPENSES

Research and development expenses for the three months ended March 31, 1998 
and 1997 were $6,065,000 and $3,877,000, respectively.  The increase was 
primarily due to additional clinical costs associated with Phase I and 
Phase II clinical trials of ONYX-015, the lead product in the Company's 
p53 program. The Company expects to continue to expand the scope of its 
research and development programs in future periods, which may result in 
substantial increases in research and development expenses, including costs 
associated with clinical development of ONYX-015 in the p53 therapeutic virus 
program. These research and development expenses may not be funded by 
collaborative partners. 

GENERAL AND ADMINISTRATIVE EXPENSES

General and administrative expenses for the three months ended March 31, 1998 
and 1997 were $1,290,000 and $1,266,000, respectively.  The increase was 
primarily due to increased administrative staffing.  General and 
administrative expenses are expected to increase to support the Company's 
research and development efforts.

NET INTEREST INCOME

The Company had net interest income of $484,000 and $498,000 for the three 
months ended March 31, 1998 and 1997, respectively.  The decrease in net 
interest income was due to interest expense on the Company's line of credit 
arrangement.

LIQUIDITY AND CAPITAL RESOURCES

Since inception, the Company's cash expenditures have substantially exceeded 
its revenues and the Company has relied primarily on the proceeds from the 
sale of equity securities and revenue from collaborative research and 
development agreements to fund its operations.

The Company's cash, cash equivalents and short-term investments were 
$43,324,000 at March 31, 1998, compared with $35,472,000 at December 31, 
1997.  Increasing levels of clinical research and product development 
associated with ONYX-015, the lead product in the p53 program, resulted in 
approximately $1,538,000 of cash used in operations for the three months 
ended March 31, 1998.  The increase in cash and investments of $7,852,000 at 
March 31, 1998 compared with March 31, 1997 is due to the private placement 
financing completed on January 12,1998 which raised approximately $10 
million.  The Company expects cash used in operations will continue to 
increase as clinical development for ONYX-015 progresses.

Total capital expenditures for equipment and leasehold improvements for the 
three-month period ended March 31, 1998 was $238,000.  The Company expects to 
make expenditures of approximately $2.4 million for the remainder of 1998 for 
capital equipment and improvements to its existing facility.  

The Company believes that its existing capital resources and interest 
thereon, and anticipated revenues from existing collaborations will be 
sufficient to fund its current and planned operations through the end of 
1999.  There can be no assurance, however, that changes in the Company's 
operating expenses will not result in the expenditure of such resources 
before such time, and in any event, the Company will need to raise 
substantial additional capital to fund its operations in future periods.

                                       9


                            ONYX PHARMACEUTICALS, INC.

BUSINESS RISKS

The Company is at an early stage of development.  The development of the 
Company's technology and proposed products will require a commitment of 
substantial funds to conduct these costly and time-consuming activities.  All 
of the Company's potential products are in research or development and will 
require significant additional research and development efforts prior to any 
commercial use, including extensive preclinical and clinical testing as well 
as lengthy regulatory approval.  The development of new products is subject 
to a number of significant risks.  Potential products that appear to be 
promising at an early stage of development may not reach the market for a 
number of reasons.  Such risks include the possibilities that the potential 
products will be found ineffective or unduly toxic during clinical trials, 
fail to receive necessary regulatory approvals, be difficult to manufacture 
on a large scale, be uneconomical to market or be precluded from 
commercialization by proprietary rights of third parties.  

The Company is currently engaged in three self-funded Phase II clinical 
trials of ONYX-015 for the treatment of head and neck cancer.  The ability of 
the Company to obtain a corporate partner for the p53 program and to continue 
to develop ONYX-015 as a potential product will depend materially on the 
results of these trials.  There is no assurance that such results will be 
positive or, even if they are positive, that they will be sufficiently strong 
to support the Company's corporate partnering or product development 
objectives.  

In addition, many of the Company's potential products are subject to 
development and licensing arrangements with the Company's collaborators.  
Therefore, the Company is dependent on the research and development efforts 
of these collaborators.  Moreover, the Company is entitled to only a portion 
of the revenues, if any, realized from the commercial sale of any of the 
potential products covered by the collaborations.  Should the Company or its 
collaborators fail to perform in accordance with the terms of any of their 
agreements or terminate such agreements without cause, any consequent loss of 
revenue under the agreements could have a material adverse effect on the 
Company's results of operations. 

There can be no assurance that the Company will be able to maintain existing 
collaborative agreements, negotiate collaborative arrangements in the future 
on acceptable terms, if at all, or that any such collaborative arrangements 
will be successful.  To the extent that the Company is not able to maintain 
or establish such arrangements, the Company would be required to undertake 
such activities at its own expense.

The proposed products under development by the Company have never been 
manufactured on a commercial scale, and there can be no assurance that such 
products can be manufactured at a cost or in quantities necessary to make 
them commercially viable.  The Company has no sales, marketing or 
distribution capability.  If any of its products subject to collaborative 
agreements are successfully developed, the Company must rely on its 
collaborators to market such products.  If the Company develops any products 
which are not subject to collaborative agreements, it must either rely on 
other large pharmaceutical companies to market such products or must develop 
a marketing and sales force with technical expertise and supporting 
distribution capability in order to market such products directly.  

The Company intends to seek additional funding through collaborative 
arrangements, public or private equity or debt financings, capital lease 
transactions or other financing sources that may be available.  However, 
there can be no assurance that additional financing will be available on 
acceptable terms or at all.  If additional funds are raised by issuing equity 
securities, substantial dilution to existing stockholders may result.  If 
adequate funds are not available, the Company may be required to delay, 
reduce the scope of, or eliminate one or more of its research or development 
programs or to obtain funds through collaborative arrangements with others 
that are on unfavorable terms or that may require the Company to relinquish 
rights to certain of its technologies, product candidates or products that 
the Company would otherwise seek to develop itself.


                                       10



                            ONYX PHARMACEUTICALS, INC.

The foregoing risks reflect the Company's early stage of development and the 
nature of its industry and proposed product.  Also inherent in the Company's 
stage of development is a range of additional risks, including competition, 
uncertainties regarding protection of patents and proprietary rights, 
government regulation and uncertainties regarding health care reform.

                                       11



                            ONYX PHARMACEUTICALS, INC.

PART II:  OTHER INFORMATION

Item 2.   CHANGES IN SECURITIES AND USE OF PROCEEDS

On January 12, 1998, the Company sold and issued 1,403,508 shares of its 
common stock at a purchase price of $7.125 per share in a private placement 
to two institutional investors.  The Company received aggregate proceeds of 
approximately $10,000,000 from the private placement.  The issuance was 
exempt under Regulation S of the Securities Act of 1933 as amended. The 
Securities and Exchange Commission has declared effective an S-3 Registration 
Statement for the resale of such shares.

Item  6.  EXHIBITS AND REPORTS ON FORM 8-K

          a)  Exhibits

                  Exhibit 27.1   Financial Data Schedule


          b)  Reports on Form 8-K

                  The Company filed a Current Report on Form 8-K with the 
                  Securities and Exchange Commission on January 26, 1998 
                  in connection with the sale and issuance of 1,403,508 
                  shares of its common stock.

                                       12



                            ONYX PHARMACEUTICALS, INC.

SIGNATURES

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

                                       ONYX PHARMACEUTICALS, INC.


Date:  May 15, 1998                    By:  /s/ HOLLINGS C. RENTON
                                            ----------------------
                                            Hollings C. Renton
                                            President, Chief Executive 
                                              Officer and Director
                                            (Principal Executive Officer)



Date:  May 15, 1998                    By:  /s/ DOUGLAS L. BLANKENSHIP
                                            --------------------------
                                            Douglas L. Blankenship
                                            Treasurer 
                                            (Principal Financial and Accounting 
                                               Officer)


                                       13



                            ONYX PHARMACEUTICALS, INC.

EXHIBIT INDEX




                                                                   Sequentially
                                                                   Numbered
Exhibit Number     Description of Exhibits                         Page
- --------------     -----------------------                         ----
                                                             
     27.1          Financial Data Schedule




                                       14