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Amgen's Third Quarter 2003 Adjusted Earnings Per Share Increases 56% to 53 Cents

Third Quarter 2003 GAAP Earnings Per Share 46 Cents Versus Third Quarter 2002 $2.10 loss Total Product Sales Increase 54% Total Product Sales Increase 54% 2003 EPOGEN(R)/Aranesp(R) Sales Guidance Raised to a Range of $3.8 to $4.0 Billion From $3.7 to $3.9 Billion 2003 Total Product Sales Guidance Revised to a Range of $7.6 to $7.9 Billion From $7.5 to $8.0 Billion Adjusted Earnings Per Share Guidance Unchanged

THOUSAND OAKS, Calif., Oct 21, 2003 -- Amgen Inc. (Nasdaq: AMGN) today announced that adjusted earnings per share for the third quarter of 2003 was 53 cents versus adjusted earnings per share of 34 cents for the third quarter of 2002, an increase of 56%. Adjusted net income was $714 million in the third quarter of 2003 versus adjusted net income of $437 million in the third quarter of 2002, a 63% increase.

Adjusted earnings per share and adjusted net income for the three months ended September 30, 2003 and 2002 exclude certain expenses related to the acquisition of Immunex, and certain other items. These expenses and other items are detailed on the reconciliation tables below.

On a reported basis, calculated in accordance with U.S. generally accepted accounting principles (GAAP), Amgen reported earnings per share of 46 cents in the third quarter of 2003 versus a loss of $2.10 per share in the third quarter of 2002. GAAP net income for the third quarter 2003 was $612 million versus a loss of $2.6 billion in the third quarter of 2002. The third quarter 2002 loss was principally due to the one-time write-off of in-process research and development of $3 billion related to the acquisition of Immunex.

Total revenue increased 47% to $2.2 billion in the third quarter of 2003 versus the same period in 2002.

"This quarter we've seen solid performance across all of our marketed products, highlighted by the continuing success of Aranesp," said Kevin Sharer, chairman and chief executive officer. "Our pipeline continues to progress, including our recent regulatory filings for cinacalcet HCl, a novel treatment that may help chronic kidney disease patients with secondary hyperparathyroidism who are at risk of significant bone disease and cardiovascular complications. This quarter was also an active quarter in our collaborations with other companies as we continue our outreach efforts. I want to thank all of our staff at Amgen for their hard work towards bringing important therapies to people with serious illnesses," Sharer added.

Product Sales Performance and Expenses

Total product sales in the quarter were $2.1 billion, an increase of 54% over the same period last year. U.S. product sales were $1.8 billion, an increase of 47% versus the third quarter of last year. International sales were $300 million for the third quarter versus $138 million for the same quarter last year, an increase of 117%. Without the beneficial impact of foreign exchange in the third quarter, international sales would have grown 91%.

For the third quarter, combined worldwide sales of EPOGEN(R) (Epoetin alfa), Amgen's anemia therapy for patients on dialysis, and Aranesp(R) (darbepoetin alfa), its latest anemia product for the treatment of anemia associated with chronic renal failure and anemia due to chemotherapy, increased 58% to $1.1 billion from $672 million for the third quarter of 2002. This increase was substantially driven by worldwide Aranesp(R) sales. EPOGEN(R) sales were $626 million for the third quarter, an increase of 12% over the same quarter last year. The company indicated that the growth was principally due to a favorable revised estimate of dialysis demand for prior quarters. This adjustment, which results from spillover, is due to the company's contractual relationship with Johnson & Johnson. (Please refer to the Company's 2002 Form 10-K for a more detailed discussion of this relationship and a description of spillover.)

EPOGEN(R) demand in the third quarter grew in the mid-single-digit range compared to the prior year. For the full year 2003, the company continues to believe that underlying dialysis patient growth, in the range of 4% to 5%, will principally drive EPOGEN(R) sales.

Worldwide Aranesp(R) sales in the third quarter were $438 million versus $114 million in the third quarter of last year. The company believes worldwide Aranesp(R) sales were primarily driven by demand. Sales growth reflects the mid-year 2002 approval for the incremental indication for chemotherapy-induced anemia in oncology in the U.S. and growth in Europe. Third quarter U.S. Aranesp(R) sales were $284 million versus $77 million last year. International Aranesp(R) sales were $154 million versus $37 million in the third quarter last year. The growth in international Aranesp(R) sales was aided by $19 million in foreign exchange benefits due to a weaker U.S. dollar.

The company now expects combined EPOGEN(R)/Aranesp(R) sales to be between $3.8 and $4.0 billion in 2003 versus the previous range of between $3.7 and $3.9 billion.

Combined worldwide sales of Neulasta(R) (pegfilgrastim) and NEUPOGEN(R) (Filgrastim) increased 39% to $657 million from $474 million in the third quarter last year. Worldwide Neulasta(R) sales were $327 million in the third quarter of 2003, $23 million of which were international sales. U.S. Neulasta(R) sales were $304 million in the third quarter versus $142 million for the third quarter last year and were demand driven. Worldwide NEUPOGEN(R) sales were $330 million for the third quarter of 2003, a slight decline from the third quarter of 2002. This reflects a decline in the U.S. due to conversion to Neulasta(R), offset by the sales growth in international markets. Neulasta(R) is Amgen's once-per-cycle product for decreasing the risk of chemotherapy-related infections, and NEUPOGEN(R) is used to decrease the incidence of infection during many types of cancer-related chemotherapy. The company indicated that the conversion from NEUPOGEN(R) to Neulasta(R) has slowed in the U.S.

On a geographic basis, third quarter NEUPOGEN(R) sales were $228 million in the U.S. versus $241 million in the third quarter of 2002, and $103 million outside the U.S. versus $91 million in the third quarter of 2002. International NEUPOGEN(R) sales growth was due to a weaker U.S. dollar.

The company continues to expect combined NEUPOGEN(R)/Neulasta(R) sales to range between $2.4 and $2.6 billion in 2003.

ENBREL(R) (etanercept), Amgen's leading inflammation biologic, had third quarter sales of $342 million, a 116% increase over third quarter 2002 sales of $158 million. ENBREL(R) sales in the third quarter were driven by new patients in both rheumatology and dermatology. Third quarter 2002 ENBREL(R) sales were adversely affected by supply shortages, and to a lesser extent, reflect two weeks fewer sales as a result of the acquisition of Immunex on July 15, 2002. Amgen continues to expect ENBREL(R) sales to range between $1.2 and $1.4 billion in 2003.

The company now expects total product sales will range between $7.6 and $7.9 billion in 2003 versus the previous range of between $7.5 and $8.0 billion. Total revenue is now expected to range between $8.1 billion and $8.4 billion versus the previous range of between $8.0 and $8.5 billion.


     Operating Expenses on an adjusted basis in both periods were as follows:

     *  Cost of sales increased to $336 million in the third quarter of 2003
        from $201 million in the third quarter of 2002 primarily due to
        increased sales.  Cost of sales as a percent of product sales
        increased from 14.9% in the third quarter of 2002 to 16.1% in the
        third quarter of 2003, reflecting a greater portion of ENBREL(R),
        which has higher manufacturing costs and royalties, in Amgen's
        product sales mix.

     *  In the third quarter of 2003, Research and Development (R&D) expense
        was $400 million versus $304 million in the third quarter of 2002.
        This increase was primarily due to additional R&D headcount, higher
        clinical trial and clinical manufacturing activity, and higher
        licensing and milestone fees associated with collaborations.

     *  Selling, General and Administrative (SG&A) expense was $479 million
        in the third quarter of 2003 versus $377 million for the prior year.
        This increase was primarily due to support of ENBREL(R), the Wyeth
        profit share related to ENBREL(R) and higher staff-related expenses
        to support new products in competitive markets.

Amgen indicated that it expected fourth quarter adjusted 2003 R&D and SG&A spending to be higher than previous quarters of 2003 in dollars and as a percentage of sales. Amgen also indicated that it now expects adjusted operating expense to range between $4.7 and $4.9 billion for 2003 versus the previous range of between $4.6 and $4.8 billion.

For the full year, the company continues to expect adjusted earnings per share to be in the range of $1.85 to $1.95. The company indicated that in the fourth quarter it will expense the up-front payment of $86.5 million associated with the licensing agreement with Biovitrum. This payment will impact GAAP and adjusted earnings.

In the third quarter of 2003, share repurchases were $323 million representing the repurchase of approximately 5 million shares. Through the first nine months of 2003, share repurchases were approximately $1.2 billion representing 20 million shares. Capital expenditures in the third quarter were $388 million compared to $209 million for the same period a year ago. The increase was principally related to the company's Puerto Rico manufacturing expansion, the construction of the company's research center in Seattle, and the building of a new ENBREL(R) manufacturing plant in Rhode Island. The company's cash and marketable securities were $5.0 billion at the end of the quarter.

The company announced plans to provide financial guidance for 2004 on a conference call in December.

Pipeline Update

Amgen announced that it had submitted an application to the European Agency for the Evaluation of Medicinal Products for cinacalcet HCl, the company's first small molecule therapeutic, for hyperparathyroidism.

The company announced earlier that it had received approval for a 50 mg once-weekly dosage of ENBREL(R) for adult patients across all indications, including moderately-to-severely active rheumatoid arthritis (RA), active arthritis in patients with psoriatic arthritis and active ankylosing spondylitis (AS), and a 0.8mg/kg once-weekly dosage (maximum 50 mg per week) for patients ages four to 17 years with moderately-to-severely active juvenile rheumatoid arthritis.

The company indicated that it has almost 40 development programs. Included are molecules that may provide advancements in oncology supportive care, targeted treatment of malignancy, pain control, management of inflammatory disease, treatment of neurodegenerative diseases, control of bone turnover, and the management of metabolic disturbances.

The company also announced plans to hold a meeting to review its R&D pipeline in the first quarter of 2004.

FORWARD LOOKING STATEMENTS

This news release contains forward-looking statements that involve significant risks and uncertainties, including those discussed below and others that can be found in our Form 10-K for the year ended December 31, 2002, and in our periodic reports on Form 10-Q and Form 8-K. Amgen is providing this information as of the date of this news release and does not undertake any obligation to update any forward-looking statements contained in this document as a result of new information, future events or otherwise.

No forward-looking statement can be guaranteed and actual results may differ materially from those we project. The Company's results may be affected by our ability to successfully market both new and existing products domestically and internationally, sales growth of recently launched products, difficulties or delays in manufacturing our products, and regulatory developments (domestic or foreign) involving current and future products and manufacturing facilities. In addition, sales of our products are affected by reimbursement policies imposed by third party payors, including governments, private insurance plans and managed care providers, and may be affected by domestic and international trends toward managed care and healthcare cost containment as well as possible US legislation affecting pharmaceutical pricing and reimbursement. Government regulations and reimbursement policies may affect the development, usage and pricing of our products. Furthermore, our research, testing, pricing, marketing and other operations are subject to extensive regulation by domestic and foreign government regulatory authorities. We, or others could identify side effects or manufacturing problems with our products after they are on the market. In addition, we compete with other companies with respect to some of our marketed products as well as for the discovery and development of new products. Discovery or identification of new product candidates cannot be guaranteed and movement from concept to product is uncertain; consequently, there can be no guarantee that any particular product candidate will be successful and become a commercial product. In addition, while we routinely obtain patents for our products and technology, the protection offered by our patents and patent applications may be challenged, invalidated or circumvented by our competitors. Further, some raw materials, medical devices, and component parts for our products are supplied by sole third party suppliers.

Amgen is a global biotechnology company that discovers, develops, manufactures and markets important human therapeutics based on advances in cellular and molecular biology.

     CONTACT:  Amgen, Thousand Oaks
     Sabrina Johnson, 805/447-4587 (Media)
     Cary Rosansky, 805/447-1060 (Investors)


                                                             Appendix I

     Amgen Inc.
     Condensed Consolidated Statements of Operations and
     Reconciliation of GAAP Earnings to "Adjusted" Earnings
     (In millions, except per share data)
     (Unaudited)

                                                   Three Months Ended
                                                   September 30, 2003
                                             GAAP   Adjustments   "Adjusted"
    Revenues:
       Product sales                       $2,078.1        $--     $2,078.1
       Royalty income                         100.5         --        100.5
       Corporate partner revenues              28.8         --         28.8
          Total revenues                    2,207.4         --      2,207.4

    Operating expenses:
       Cost of sales                          340.0       (4.4) (1)   335.6

       Research and development               407.5       (7.2) (1)   400.3
       Selling, general and administrative    483.0       (3.7) (1)   479.3

       Write off of acquired in-process
        R&D                                      --         --           --
       Amortization of intangible assets       83.9      (83.9) (2)      --
       Loss (earnings) of affiliates, net      36.2      (47.1) (3)   (10.9)
       Other items, net                          --         --           --
          Total operating expenses          1,350.6     (146.3)     1,204.3

    Operating income (loss)                   856.8      146.3      1,003.1

    Other income (expense):
       Interest and other income, net          17.2         --         17.2
       Interest expense, net                   (7.8)        --         (7.8)
          Total other income                    9.4         --          9.4

    Income (loss) before income taxes         866.2      146.3      1,012.5

    Provision for income taxes                254.1       44.8 (10)   298.9

    Net income (loss)                        $612.1     $101.5       $713.6

    Earnings (loss) per share:
       Basic                                  $0.47                   $0.55
       Diluted (11)                           $0.46                   $0.53

    Shares used in calculation of
       earnings (loss) per share:
       Basic                                1,289.4                 1,289.4
       Diluted (11)                         1,347.9                 1,347.9

    (1) - (11) See explanatory notes


     Amgen Inc.
     Condensed Consolidated Statements of Operations and
     Reconciliation of GAAP Earnings to "Adjusted" Earnings
     (In millions, except per share data)
     (Unaudited)

                                                Three Months Ended
                                                September 30, 2002
                                          GAAP      Adjustments    "Adjusted"
    Revenues:
      Product sales                     $1,345.8           $--       $1,345.8
      Royalty income                        90.7            --           90.7
      Corporate partner revenues            62.8            --           62.8
         Total revenues                  1,499.3            --        1,499.3

    Operating expenses:
      Cost of sales                        226.4          (3.5) (1)     200.7
                                                         (22.2) (4)
      Research and development             312.6          (8.5) (1)     304.1
      Selling, general and
       administrative                      394.9          (9.9) (1)     376.9
                                                          (8.1) (5)
      Write off of acquired in-
       process R&D                       2,991.8      (2,991.8) (6)        --
      Amortization of intangible
       assets                               70.6         (70.6) (2)        --
      Loss (earnings) of affiliates,
       net                                  (3.4)           --           (3.4)
      Other items, net                     (35.5)         35.5 (7)         --
         Total operating expenses        3,957.4      (3,079.1)         878.3

    Operating income (loss)             (2,458.1)      3,079.1          621.0

    Other income (expense):
      Interest and other income, net        23.7            --           23.7
      Interest expense, net                (11.6)           --          (11.6)
         Total other income                 12.1            --           12.1

    Income (loss) before income taxes   (2,446.0)      3,079.1          633.1

    Provision for income taxes             155.6          40.7 (10)     196.3

    Net income (loss)                  $(2,601.6)     $3,038.4         $436.8

    Earnings (loss) per share:
      Basic                               $(2.10)                       $0.35
      Diluted (11)                        $(2.10)                       $0.34

    Shares used in calculation of
      earnings (loss) per share:
      Basic                              1,241.7                      1,241.7
      Diluted (11)                       1,241.7                      1,302.7

    (1) - (11) See explanatory notes


     Amgen Inc.
     Condensed Consolidated Statements of Operations and
     Reconciliation of GAAP Earnings to "Adjusted" Earnings
     (In millions, except per share data)
     (Unaudited)

                                                 Nine Months Ended
                                                 September 30, 2003
                                            GAAP    Adjustments    "Adjusted"
    Revenues:
      Product sales                        $5,630.5      $--        $5,630.5
      Royalty income                          283.8       --           283.8
      Corporate partner revenues               95.4       --            95.4
         Total revenues                     6,009.7       --         6,009.7

    Operating expenses:
      Cost of sales                           952.4    (14.2) (1)      938.2

      Research and development              1,152.5    (26.0) (1)    1,126.5
      Selling, general and administrative   1,326.6    (12.2) (1)    1,314.4

      Write off of acquired in-process
       R&D                                       --       --              --
      Amortization of intangible assets       251.8   (251.8) (2)         --
      Loss (earnings) of affiliates, net       14.3    (47.1) (3)      (32.8)
      Other items, net                        (24.0)    74.0  (8)         --
                                                       (50.0) (9)
         Total operating expenses           3,673.6   (327.3)        3,346.3

    Operating income (loss)                 2,336.1    327.3         2,663.4

    Other income (expense):
      Interest and other income, net           90.4       --            90.4
      Interest expense, net                   (23.5)      --           (23.5)
         Total other income                    66.9       --            66.9

    Income (loss) before income taxes       2,403.0    327.3         2,730.3

    Provision for income taxes                690.4    115.3 (10)      805.7

    Net income (loss)                      $1,712.6   $212.0        $1,924.6

    Earnings (loss) per share:
      Basic                                   $1.33                    $1.49
      Diluted (11)                            $1.28                    $1.44

    Shares used in calculation of
      earnings (loss) per share:
      Basic                                 1,289.4                  1,289.4
      Diluted (11)                          1,348.0                  1,348.0

    (1) - (11) See explanatory notes


     Amgen Inc.
     Condensed Consolidated Statements of Operations and
     Reconciliation of GAAP Earnings to "Adjusted" Earnings
     (In millions, except per share data)
     (Unaudited)

                                                Nine Months Ended
                                               September 30, 2002
                                           GAAP    Adjustments    "Adjusted"
    Revenues:
      Product sales                      $3,369.6        $--       $3,369.6
      Royalty income                        239.1         --          239.1
      Corporate partner revenues            148.2         --          148.2
         Total revenues                   3,756.9         --        3,756.9

    Operating expenses:
      Cost of sales                         461.9       (3.5) (1)     436.2
                                                       (22.2) (4)
      Research and development              749.6       (8.5) (1)     741.1
      Selling, general and
       administrative                       961.2       (9.9) (1)     943.2
                                                        (8.1) (5)
      Write off of acquired in-process
       R&D                                2,991.8   (2,991.8) (6)        --
      Amortization of intangible
       assets                                70.6      (70.6) (2)        --
      Loss (earnings) of affiliates,
       net                                   (6.8)        --           (6.8)
      Other items, net                      (35.5)      35.5  (7)        --
                                               --         --
         Total operating expenses         5,192.8   (3,079.1)       2,113.7

    Operating income (loss)              (1,435.9)   3,079.1        1,643.2

    Other income (expense):
      Interest and other income, net        112.9         --          112.9
      Interest expense, net                 (31.3)        --          (31.3)
         Total other income                  81.6         --           81.6

    Income (loss) before income taxes    (1,354.3)   3,079.1        1,724.8

    Provision for income taxes              494.0       40.7 (10)     534.7

    Net income (loss)                   $(1,848.3)  $3,038.4       $1,190.1

    Earnings (loss) per share:
      Basic                                $(1.67)                    $1.08
      Diluted (11)                         $(1.67)                    $1.04

    Shares used in calculation of
      earnings (loss) per share:
      Basic                               1,105.5                   1,105.5
      Diluted (11)                        1,105.5                   1,160.1

    (1) - (11) See explanatory notes

     Amgen Inc.
     Notes to Reconciliation of GAAP Earnings to "Adjusted" Earnings
     (In millions, except per share data)
     (Unaudited)

     (1)    To exclude the incremental compensation payable to certain Immunex
            employees principally under the Immunex short-term retention plan.
            The total estimated remaining costs of such retention benefits is
            approximately $40 million, pre-tax, and will be incurred through
            the quarter ending June 30, 2004.

     (2)    To exclude the ongoing, non-cash amortization of acquired
            intangible assets, primarily ENBREL(R), related to the Immunex
            acquisition.  The total annual non-cash charge is currently
            estimated to be approximately $340 million, pre-tax.

     (3)    To exclude the impact to the Company of a legal settlement paid to
            Genentech, Inc. ("Genentech") in connection with settling a patent
            litigation matter relating to the Company's processes for
            producing NEUPOGEN(R) and Neulasta(R).  Pursuant to the terms of a
            license agreement between the Company and Kirin-Amgen, Inc.
            ("KA"), an entity 50% owned by the Company, KA is obligated to
            indemnify the Company for the payment made to Genentech.  The
            Company accounts for its ownership interest in KA under the equity
            method and, accordingly, recorded its share of such loss incurred
            by KA in "Loss (earnings) of affiliates, net."

     (4)    To exclude the non-cash expense related to valuing the inventory
            acquired from Immunex at fair value.

     (5)    To exclude external, incremental consulting and systems
            integration costs directly associated with the integration of
            Immunex.

     (6)    To exclude the non-cash expense associated with writing off the
            acquired in-process research and development related to the
            Immunex acquisition.

     (7)    To exclude a benefit related to the recovery of certain amounts
            previously provided for in connection with terminating
            collaboration agreements with various third parties, principally
            Praecis Pharmaceuticals.

     (8)    To exclude a benefit for the recovery of costs and expenses
            associated with a legal award related to an arbitration proceeding
            with Johnson & Johnson.

     (9)    To exclude a cash contribution to the Amgen Foundation.

     (10)   To reflect the tax effect of the above adjustments, except for the
            write-off of acquired in-process research and development
            (see Note 6).

     (11)   The following tables present the computations for GAAP and
            "Adjusted" diluted earnings per share computed under the treasury
            stock and the "if-converted" methods:


                                     Three Months Ended   Three Months Ended
                                     September 30, 2003   September 30, 2002
                                        GAAP   "Adjusted"   GAAP    "Adjusted"
     Income (loss) (Numerator):
       Net income (loss) for basic
         EPS                           $612.1    $713.6  $(2,601.6)   $436.8
        Adjustment for interest
         expense on
          Convertible Notes, net of
           tax                            5.2       5.2         --       5.2
        Income (loss) for diluted
         EPS, after assumed
          conversion of Convertible
           Notes                       $617.3    $718.8  $(2,601.6)   $442.0

      Shares (Denominator):
        Weighted-average shares for
         basic EPS                    1,289.4   1,289.4    1,241.7   1,241.7
        Effect of Dilutive
         Securities                      23.5      23.5         --      26.0
        Effect of Convertible Notes,
         after assumed
          conversion of Convertible
           Notes                         35.0      35.0         --      35.0
        Adjusted weighted-average
         shares for diluted EPS       1,347.9   1,347.9    1,241.7   1,302.7

      Diluted earnings (loss) per
       share                            $0.46     $0.53     $(2.10)    $0.34


                                      Nine Months Ended    Nine Months Ended
                                      September 30, 2003  September 30, 2002
                                        GAAP   "Adjusted"   GAAP   "Adjusted"
      Income (loss) (Numerator):
        Net income (loss) for basic
         EPS                         $1,712.6  $1,924.6  $(1,848.3) $1,190.1
        Adjustment for interest
         expense on
          Convertible Notes, net of
           tax                           15.6      15.6         --      12.1
        Income (loss) for diluted
         EPS, after assumed
          conversion of Convertible
           Notes                     $1,728.2  $1,940.2  $(1,848.3) $1,202.2

      Shares (Denominator):
        Weighted-average shares for
         basic EPS                    1,289.4   1,289.4    1,105.5   1,105.5
        Effect of Dilutive
         Securities                      23.6      23.6         --      27.2
        Effect of Convertible Notes,
         after assumed
          conversion of Convertible
           Notes                         35.0      35.0         --      27.4
        Adjusted weighted-average
         shares for diluted EPS       1,348.0   1,348.0    1,105.5   1,160.1

      Diluted earnings (loss) per
       share                            $1.28     $1.44     $(1.67)    $1.04


                                                             Appendix II

     Amgen Inc.
     Condensed Consolidated Balance Sheets
     (In millions)
     (Unaudited)

                                           September 30,      December 31,
                                                2003              2002
    Assets
    Current assets:
      Cash and marketable securities          $5,025.0          $4,663.9
      Trade receivables, net                   1,001.4             752.4
      Inventories                                684.8             544.9
      Other current assets                       582.8             442.3
         Total current assets                  7,294.0           6,403.5
    Property, plant, and equipment, net        3,456.7           2,813.5
    Intangible assets, net                     4,542.1           4,801.9
    Goodwill                                   9,870.7           9,871.1
    Other assets                                 705.3             566.3
         Total assets                        $25,868.8         $24,456.3

    Liabilities and Stockholders' Equity
    Current liabilities                       $1,548.3          $1,529.2
    Deferred tax liabilities                   1,791.4           1,593.4
    Long-term debt                             3,071.8           3,047.7
    Stockholders' equity                      19,457.3          18,286.0
         Total liabilities and
          stockholders' equity               $25,868.8         $24,456.3

    Shares outstanding                         1,289.6           1,289.1


                                                             Appendix III

     Amgen Inc.
     Product Sales Detail by Product and Geographic Region
     (In millions)
     (Unaudited)


                                       Three Months Ended  Nine Months Ended
                                         September 30,       September 30,
                                         2003      2002      2003      2002

     EPOGEN(R) - U.S                    $625.9    $558.4  $1,784.1  $1,640.9

     Aranesp(R) - U.S.                   283.9      76.8     658.4     134.3

     Aranesp(R) - International          154.4      36.9     382.4      74.3

     NEUPOGEN(R) - U.S.                  227.9     241.1     655.2     802.3

     NEUPOGEN(R) - International         102.5      91.1     290.0     248.3

     Neulasta(R) - U.S.                  304.3     141.7     847.7     251.5

     Neulasta(R) - International          22.6        --      40.6        --

     ENBREL(R) - U.S.                    329.1     150.5     887.3     150.5

     ENBREL(R) - International            12.5       7.6      32.3       7.6

     Other product sales - U.S.            7.3      39.1      30.5      55.5

     Other product sales - International   7.7       2.6      22.0       4.4

       Total product sales            $2,078.1  $1,345.8  $5,630.5  $3,369.6


     U.S.                             $1,778.4  $1,207.6  $4,863.2  $3,035.0

     International                       299.7     138.2     767.3     334.6

                                      $2,078.1  $1,345.8  $5,630.5  $3,369.6


                                                             Appendix IV

     Amgen Inc.
     Reconciliation of "Adjusted" Earnings Guidance to GAAP Earnings Guidance
     for the Year Ended December 31, 2003

                                                                 2003

     "Adjusted" earnings per share guidance                   $1.85 - $1.95

     Known adjustments to arrive at GAAP earnings:
      Amortization of acquired intangible assets                     (0.16)
      Merger related retention expenses                              (0.03)
      Amgen Foundation contribution                                  (0.02)
      Genentech litigation settlement                                (0.02)
      J&J arbitration recovery                                         0.03

     GAAP earnings per share guidance                         $1.65 - $1.75


     "Adjusted" operating expense guidance             $4.7 to $4.9 billion

     Impact of known adjustments to arrive at GAAP
      operating expenses:
      Amortization of acquired intangible assets                340 million
      Merger related retention expenses                          70 million
      Amgen Foundation contribution                              50 million
      Genentech litigation settlement                            47 million
      J&J arbitration recovery                                 (74 million)

     GAAP operating expense guidance                   $5.1 to $5.3 billion

media, Sabrina Johnson, +1-805-447-4587, or investors, Cary
Rosansky, +1-805-447-1060, both of Amgen Inc.
http://www.amgen.com