Prospectus Supplement

The notes will mature on March 2, 2009, will be our senior unsecured debt obligations, will not be redeemable prior to maturity, and will not be subject to any sinking fund. Interest will be payable on the notes on March 2 and September 2 of each year.

The underwriters propose to offer the notes from time to time for sale in negotiated transactions, or otherwise, at varying prices to be determined at the time of each sale. The underwriters have agreed to purchase the notes from us at 99.614% of their principal amount ($298,842,000 of proceeds to us), subject to the terms and conditions in the underwriting agreement between the underwriters and us.

The Securities and Exchange Commission and state securities regulators have not approved or disapproved these securities, or determined if this prospectus supplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The underwriters expect to deliver the notes to purchasers on February 19, 2003.

You should rely only on the information contained or incorporated by reference in this prospectus supplement and the accompanying prospectus. No person is authorized to give any information or to make any representations other than those contained or incorporated by reference in this prospectus supplement or the accompanying prospectus. If anyone provides you with different or inconsistent information, you should not rely on it. This prospectus supplement and the accompanying prospectus is not an offer to sell or buy any securities in any jurisdiction where it is unlawful. Neither the delivery of this prospectus supplement or the accompanying prospectus, nor any sale of Notes made under these documents, will, under any circumstances, create any implication that there has been no change in our affairs since the date of this prospectus supplement or the accompanying prospectus or that the information contained or incorporated by reference is correct as of any time subsequent to the date of such information. Our business, financial condition, results of operation and prospects may have changed since those dates.

The information contained in this prospectus supplement is accurate only as of the date hereof, and will not be updated as a result of new information or future events or developments.

This prospectus supplement and accompanying prospectus contain or incorporate forward-looking statements within the meaning of the securities laws about our financial results and estimates, business prospects and products in research that involve substantial risks and uncertainties. You can identify these statements by the fact that they use words such as “anticipate,” “estimate,” “expect,” “project,” “intend,” “plan,” “believe,” and other words and terms of similar meaning in connection with any discussion of future operating or financial performance. Among the factors that could cause actual results to differ materially are the following: the success of research and development activities and the speed with which regulatory authorizations, pricing approvals and product launches may be achieved; competitive developments affecting our current growth products; our ability to successfully market both new and existing products domestically and internationally; difficulties or delays in manufacturing; trade buying patterns; our ability to meet generic and branded competition after the loss of

patent protection for our products; trends toward managed care and health care cost containment; possible U.S. legislation affecting, among other things, pharmaceutical pricing and reimbursement, including Medicaid and Medicare; legislation or regulations in markets outside the U.S. affecting product pricing, reimbursement or access; contingencies related to actual or alleged environmental contamination; legal defense costs, insurance expense, settlement costs, and the risk of an adverse decision related to product liability, patent protection and other lawsuits; our ability to protect our patents and other intellectual property both domestically and internationally; interest rate and foreign currency exchange rate fluctuations; governmental laws and regulations affecting domestic and foreign operations, including tax obligations; changes in generally accepted accounting principles; any changes in business, political and economic conditions due to the threat of future terrorist activity in the U.S. and other parts of the world, and related U.S. military action overseas; ability to divest and the timing of the divestitures of the discontinued businesses; growth in costs and expenses; changes in our product mix; and the impact of acquisitions, divestitures, restructurings and other unusual items, including our ability to obtain the anticipated results and synergies from our announced proposed acquisition of Pharmacia and the increased uncertainty created by the integration of the two businesses, as well as our sale of the Tetra business, our proposed sale of the Adams and Schick-Wilkinson Sword businesses and the timing and success of the sale of the women’s health product lines. A further list and description of these risks, uncertainties and other matters can be found in our Annual Report on Form 10-K for the fiscal year ended December 31, 2001, and in our periodic reports on Forms 10-Q and 8-K (if any).

Our consolidated ratio of earnings to fixed charges for the nine months ended September 29, 2002 and for each of the fiscal years ended December 31, 1997 through 2001 is set forth below. For the purpose of computing this ratio, “earnings” consist of income from continuing operations before provision for taxes on income and minority interests and cumulative effect of a change in accounting principle less minority interests and less undistributed earnings (losses) of unconsolidated subsidiaries adjusted for fixed charges, excluding capitalized interest. “Fixed charges” consist of interest expense, amortization of debt discount and expenses, capitalized interest and one-third of rental expense which we believe to be a conservative estimate of an interest factor in our leases. It is not practicable to calculate the interest factor in a material portion of our leases. The ratio was calculated by dividing the sum of the fixed charges into the sum of the earnings before taxes, cumulative effect of a change in accounting principle and fixed charges, excluding capitalized interest.

We will use the net proceeds before expenses from the sale of the Notes of approximately $298,842,000 for general corporate purposes, including the refinancing of existing debt. We may temporarily invest funds that are not immediately needed for these purposes in short-term marketable securities.

The Notes are a series of debt securities described in the accompanying prospectus. Reference should be made to the accompanying prospectus for a detailed summary of additional provisions of the Notes and of the indenture dated as of January 30, 2001 between Pfizer Inc. and JPMorgan Chase Bank, formerly known as The Chase Manhattan Bank, as trustee, under which the Notes are issued. The following description is a summary of selected portions of the indenture. It does not restate the indenture because it, and not this description, defines your rights as a holder of the Notes.

The Notes will initially be limited to $300,000,000 aggregate principal amount. The Notes will mature on March 2, 2009. We will issue the Notes in denominations of $1,000 and integral multiples of $1,000.

Interest on the Notes will accrue at the annual rate of 3.30%. Interest will accrue from and including February 19, 2003, and is payable on March 2 and September 2 of each year, commencing September 2, 2003. We will make each interest payment to the holders of record of Notes at the close of business on the next preceding February 16 or August 16.

Interest will be computed on the basis of a 360-day year comprised of twelve 30-day months. The trustee, through its corporate trust office in the Borough of Manhattan, City of New York (in such capacity, the “paying agent”) will act as our paying agent with respect to the Notes. Payments of principal, interest and premium, if any, will be made by us through the paying agent to DTC.

The Notes will be unsecured general obligations of Pfizer and will rank equally with all other unsecured and unsubordinated indebtedness of Pfizer from time to time outstanding.

Pfizer may, without the consent of the holders of Notes, issue additional notes having the same ranking and the same interest rate, maturity and other terms as the Notes. Any additional notes having such similar terms, together with the Notes, will constitute a single series of notes under the indenture. No additional notes of this series may be issued if an event of default has occurred with respect to the Notes. Pfizer will not issue any additional notes intended to form a single series with the Notes unless the further notes will be fungible with all notes of the same series for U.S. Federal income tax purposes.

The Notes are not redeemable prior to maturity and will not be entitled to the benefit of a sinking fund.

The Depository Trust Company, New York, NY, will act as securities depository for the Notes. The Notes will be issued as fully registered securities registered in the name of Cede & Co. (DTC’s partnership nominee) or such other name as may be requested by an authorized representative of DTC. One or more fully-registered Note certificates will be issued for the Notes, in the aggregate principal amount of such issue, and will be deposited with DTC.

Beneficial interests in the Notes will be shown on, and transfers thereof will be effected only through, records maintained by DTC and its direct and indirect participants, including Euroclear Bank S.A./N.V., as operator of the Euroclear System (“Euroclear”) and Clearstream Banking, Société anonyme, Luxembourg (“Clearstream Banking”). Investors may elect to hold interests in the Notes through any of DTC, Euroclear or Clearstream Banking, if they are participants in these systems, or indirectly through organizations which are participants in these systems. Euroclear and Clearstream Banking hold securities on behalf of their participants through customers’ securities accounts in their respective names on the books of their respective depositaries, which in turn hold the securities in customers’ securities accounts in the depositaries’ names on the books of DTC.

Euroclear and Clearstream Banking have informed us that: Euroclear and Clearstream Banking each hold securities for their customers and facilitate the clearance and settlement of securities transactions by electronic book-entry transfer between their respective account holders. Euroclear and Clearstream Banking provide various services including safekeeping, administration, clearance and settlement of internationally traded securities and securities lending and borrowing. Euroclear and Clearstream Banking also deal with domestic securities markets in several countries through established depository and custodial relationships. Euroclear and Clearstream Banking have established an electronic bridge between their two systems across which their respective participants may settle trades with each other.

Euroclear and Clearstream Banking customers are world-wide financial institutions including underwriters, securities brokers and dealers, banks, trust companies and clearing corporations. Indirect access to Euroclear and Clearstream Banking is available to other institutions which clear through or maintain a custodial relationship with an account holder of either system.

DTC holds securities that its participants (“Direct Participants”) deposit with DTC. DTC also facilitates the settlement among Direct Participants of securities transactions, such as transfers and pledges, in deposited securities through electronic computerized book-entry changes in Direct Participants’ accounts, which eliminates the need for physical movement of securities certificates. Direct Participants include securities brokers and dealers, banks, trust companies, clearing corporations, and certain other organizations. DTC is owned by a number of its Direct Participants and by New York Stock Exchange, Inc., the American Stock Exchange LLC, and the National Association of Securities Dealers, Inc. Access to the DTC system is also available to others such as securities brokers and dealers, banks, and trust companies that clear through or maintain a custodial relationship with a Direct Participant, either directly or indirectly (“Indirect Participants”). The rules applicable to DTC and its Direct and Indirect Participants are on file with the Securities and Exchange Commission.

Purchases of Notes under the DTC system must be made by or through Direct Participants, which receive a credit for the Notes on DTC’s records. The ownership interest of each actual purchaser of each Note (“Beneficial Owner”) is in turn to be recorded on the Direct and Indirect Participants’ records. Beneficial Owners will not receive written confirmations from DTC of their purchase, but Beneficial Owners are expected to receive written confirmations providing details of the transaction, as well as periodic statements of their holdings, from the Direct or Indirect Participant through which the Beneficial Owner entered into the transaction. Transfers of ownership interests in the Notes are to be accomplished by entries made on the books of Direct and Indirect Participants acting on behalf of Beneficial Owners. Beneficial Owners will not receive certificates representing their ownership interests in Notes except in the event that use of the book-entry system for the Notes is discontinued. As a result, the ability of a person having a beneficial interest in the Notes to pledge such interest to persons or entities that do not participate in the DTC system, or to otherwise take actions with respect to such interest, may be affected by the lack of a physical certificate evidencing such interest. In addition, the laws of some states require that certain persons take physical delivery in definitive form of securities that they own and that security interests in negotiable instruments can only be perfected by delivery of certificates representing the instruments. Consequently, the ability to transfer notes evidenced by the global notes will be limited to such extent.

To facilitate subsequent transfers, all Notes deposited by Direct Participants with DTC are registered in the name of DTC’s partnership nominee, Cede & Co. or such other name as may be requested by an authorized representative of DTC. The deposit of Notes with DTC and their registration in the name of Cede & Co. or such other nominee do not effect any change in beneficial ownership. DTC has no knowledge of the actual Beneficial Owners of the Notes; DTC’s records reflect only the identity of the Direct Participants to whose accounts such Notes are credited, which may or may not be the Beneficial Owners. The Direct and Indirect Participants will remain responsible for keeping account of their holdings on behalf of their customers.

Conveyance of notices and another communications by DTC to Direct Participants, by Direct Participants to Indirect Participants, and by Direct Participants and Indirect Participants to Beneficial Owners will be governed by arrangements among them, subject to any statutory or regulatory requirements as may be in effect from time to time.

Neither DTC nor Cede & Co. (nor such other DTC nominee) will consent or vote with respect to the Notes. Under its usual procedures, DTC mails an Omnibus Proxy to the issuer as soon as possible after the record date. The Omnibus Proxy assigns Cede & Co.’s consenting or voting rights to those Direct Participants to whose accounts the Notes are credited on the record date ( identified in a listing attached to the Omnibus Proxy).

Payments of principal, interest and premium, if any, on the Notes will be made to Cede & Co., or such other nominee as may be requested by an authorized representative of DTC. DTC’s practice is to credit Direct Participants’ accounts, upon DTC’s receipt of funds and corresponding detail information from us on the payable date in accordance with their respective holdings shown on DTC’s records. Payments by Participants to Beneficial Owners will be governed by standing instructions and customary practices, as is the case with securities held for the accounts of customers in bearer form or registered in “street name” and will be the responsibility of such Participant and not of DTC, or us, subject to any statutory or regulatory requirements as may be in effect from time to time. Payment of redemption proceeds, distributions, and dividends to Cede & Co. (or such other nominee as may be requested by an authorized representative of DTC) is our responsibility and disbursement of such payments to Direct Participants will be the responsibility of DTC, and disbursement of such payments to the Beneficial Owners will be the responsibility of Direct and Indirect Participants.

Investors electing to hold their Notes through DTC will follow the settlement practices applicable to U.S. corporate debt obligations. The securities custody accounts of investors will be credited with their holdings on the settlement date against payment in same-day funds within DTC effected in U.S. dollars.

Investors electing to hold their Notes through Euroclear or Clearstream Banking accounts will follow the settlement procedures applicable to conventional eurobonds.

Secondary market sales of book-entry interests in the Notes between DTC participants will occur in the ordinary way in accordance with DTC rules and will be settled using the procedures applicable to United States corporate debt obligations in DTC’s Settlement System. Secondary market sales of book-entry interests in the Notes held through Euroclear or Clearstream Banking to purchasers of book-entry interests in the Notes through Euroclear or Clearstream Banking will be conducted in accordance with the normal rules and operating procedures of Euroclear and Clearstream Banking and will be settled using the procedures applicable to conventional eurobonds.

DTC may discontinue providing its services as securities depository with respect to the Notes at any time by giving reasonable notice to us. Under such circumstances, in the event that a successor securities depository is not obtained, Note certificates are required to be printed and delivered. In addition, we may decide to discontinue use of the system of book-entry transfers through DTC (or a successor securities depository). In that event, Note certificates will be printed and delivered. See “Description of Debt Securities—Global Securities” in the accompanying prospectus.

We will not have any responsibility or obligation to participants in the DTC system or the persons for whom they act as nominees with respect to the accuracy of the records of DTC, its nominee or any Direct or Indirect Participant with respect to any ownership interest in the Notes, or with respect to payments to or providing of notice for the Direct Participants, the Indirect Participants or the beneficial owners of the Notes.

The information in this section concerning DTC, Euroclear, Clearstream Banking and their book-entry systems has been obtained from sources that we believe to be reliable. Neither we, the trustee or the underwriters, dealers or agents are responsible for the accuracy or completeness of this information.

Subject to the terms and conditions set forth in the underwriting agreement, dated February 13, 2003, among us and the underwriters in the table below, we have agreed to sell each of the underwriters, and each such underwriter has severally, and not jointly, agreed to purchase from us, the aggregate principal amount of the Notes set forth opposite its name below:

J.P. Morgan Securities Inc. and Morgan Stanley & Co. Incorporated are joint book running managers for the offering. The underwriters propose to offer the Notes from time to time for sale in negotiated transactions, or otherwise, at varying prices to be determined at the time of each sale. In connection with the sale of the Notes, the underwriters may be deemed to have received compensation from us in the form of underwriting discounts.

We have agreed to indemnify the underwriters against certain liabilities, including liabilities under the Securities Act of 1933, as amended, or to contribute to payments the underwriters may be required to make in respect of those liabilities.

The underwriters are offering the Notes, subject to prior sale, when, as and if issued to and accepted by them, subject to approval of legal matters by their counsel, including the validity of the Notes, and other conditions contained in the underwriting agreement, such as the receipt by the underwriters of officer’s certificates and legal opinions. The underwriters reserve the right to withdraw, cancel or modify offers to the public and to reject orders in whole or in part.

In connection with the offering, the underwriters are permitted to engage in transactions that stabilize the market price of the Notes. Such transactions consist of bids or purchases to peg, fix or maintain the price of the Notes. If the underwriters create a short position in the Notes in connection with the offering, i.e., if they sell more Notes than are on the cover page of this prospectus, the underwriters may reduce that short position by purchasing Notes in the open market. Purchases of a security to stabilize the price or to reduce a short position could cause the price of the security to be higher than it might be in the absence of such purchases. Neither we nor either underwriter makes any representation or prediction as to the direction or magnitude of any effect that the transactions described above may have on the price of the Notes. In addition, neither we nor either underwriter makes any representation that the underwriters will engage in these transactions or that these transactions, once commenced, will not be discontinued without notice.

The underwriters and their affiliates have provided investment and commercial banking and financial advisory services from time to time for us in the ordinary course of business for which they have received customary fees. The underwriters and their affiliates may in the future engage in investment banking or other transactions of a financial nature with us or our affiliates, for which they would receive customary fees or other payments. M. Anthony Burns and William H. Gray, III, members of our board of directors, are also members of the board of directors of J.P. Morgan Chase & Co., of which J.P. Morgan Securities Inc. is a subsidiary.

There is no public trading market for the Notes and we do not intend to apply for listing of the Notes on any national securities exchange or for quotation of the Notes on any automated dealer quotation system. We have been advised by the underwriters that they presently intend to make a market in the Notes after the consummation of the offering, although they are under no obligation to do so and may discontinue any market-making activities at any time without any notice. Prior to the offering, there has been no active market for the Notes. No assurance can be given as to the liquidity of, or trading market for, the Notes or that an active public

market for the Notes will develop. If an active trading market for the Notes does not develop, the market price and liquidity of the Notes may be adversely affected. If the Notes are traded, they may trade at a discount from their initial offering price, depending on prevailing interest rates, the market for similar securities, our performance and certain other factors.

We estimate that our expenses in connection with this offering, excluding underwriting discounts and commissions, will be approximately $60,000.

Margaret M. Foran, our Vice President-Corporate Governance and Secretary, will pass upon the validity of the Notes. Cravath, Swaine & Moore, New York, New York will pass upon various legal matters for the underwriters relating to the offering.

Pfizer Inc. may from time to time issue up to a total of $5,000,000,000 of debt securities. The accompanying prospectus supplement will specify the terms of the securities. You should read this prospectus and any supplement carefully before you invest.

NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR PASSED UPON THE ADEQUACY OR ACCURACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

We may sell these securities to or through dealers, underwriters, or agents. The names of any dealers, underwriters or agents will be set forth in the prospectus supplement.

The information contained in this prospectus is not complete and may be changed. You should rely only on the information incorporated by reference or provided in this prospectus or any prospectus supplement. We have not authorized anyone else to provide you with different information. We are not making an offer of these debt securities in any state where the offer is not permitted. You should not assume that the information in this prospectus or any prospectus supplement is accurate as of any date other than the date on the front cover of those documents.

This prospectus is part of a registration statement that we filed with the SEC using a “shelf” registration process. Under this shelf registration process, we may sell any combination of the debt securities described in this prospectus in one or more offerings up to a total amount of $5,000,000,000. This prospectus provides you with a general description of the debt securities we may offer. Each time we issue debt securities, we will provide a prospectus supplement that will contain specific information about the terms of that specific offering. The prospectus supplement may also add to or update other information contained in this prospectus. You should read both this prospectus and the accompanying prospectus supplement together with additional information described under “Where You Can Find More Information”.

We file annual, quarterly and special reports, proxy statements and other information with the SEC. Our SEC filings are available to the public over the Internet at the SEC’s web site at www.sec.gov. You may also read and copy any document we file at the SEC’s public reference room at 450 Fifth Street, N.W., Washington, D.C., 20549. Please call the SEC at 1-800-SEC-0330 for further information on the public reference room. You can also find information about us by visiting our website at www.pfizer.com.

The SEC allows us to incorporate by reference the information we file with them, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to be part of this prospectus, and information that we file later with the SEC will automatically update and supersede this information. We incorporate by reference the documents listed below and any future filings made with the SEC under Sections 13(a), 13(c), 14, or 15(d) of the Securities Exchange Act of 1934, until we complete our offering of the debt securities:

You may request a copy of these filings at no cost, by writing or telephoning us at the following address.

We are a research-based global pharmaceutical company. We discover, develop, manufacture and market leading prescription medicines for humans and animals as well as many of the world’s best-known consumer products.

All references to us in this prospectus include Pfizer Inc. and its subsidiaries, unless the context clearly indicates otherwise.

Our financial information described in this prospectus has been restated to reflect our merger with Warner-Lambert Company, which was completed on June 19, 2000.

Our principal executive offices are located at 235 East 42nd Street, New York, NY 10017 and our telephone number is (212) 573-2323.

Our consolidated ratio of earnings to fixed charges for each of the fiscal years ended December 31, 1997 through 2001 is set forth below. For the purpose of computing these ratios, “earnings” consists of income from continuing operations before provision for taxes on income, minority interests and cumulative effect of a change in accounting principle less minority interests adjusted for fixed charges, excluding capitalized interest. “Fixed charges” consists of interest expense (which includes amortization of debt discount and expenses) capitalized interest and one-third of rental expense which we believe to be a conservative estimate of an interest factor in our leases. It is not practicable to calculate the interest factor in a material portion of our leases. The ratio was calculated by dividing the sum of the fixed charges into the sum of the earnings from continuing operations before taxes and fixed charges.

Unless the applicable prospectus supplement indicates otherwise, we intend to use net proceeds from the sale of the debt securities for general corporate purposes, including the refinancing of existing debt. We may temporarily invest funds that are not immediately needed for these purposes in short-term marketable securities.

The debt securities covered by this prospectus will be our direct unsecured obligations. The debt securities will be issued in one or more series under an indenture dated as of January 30, 2001, between us and JPMorgan Chase Bank (formerly The Chase Manhattan Bank), as trustee.

This prospectus briefly outlines some of the indenture provisions. The indenture has been filed as an exhibit to the registration statement and you should read the indenture carefully for provisions that may be important to you.

We may issue the debt securities as original issue discount securities, which will be offered and sold at a substantial discount below their stated principal amount. A prospectus supplement relating to original issue discount securities will describe Federal income tax consequences and other special considerations applicable to them. The debt securities may also be issued as indexed securities or securities denominated in foreign currencies or currency units, as described in more detail in a prospectus supplement relating to any of these types of debt securities. A prospectus supplement relating to indexed debt securities or foreign currency debt securities will also describe any additional tax consequences or other special considerations applicable to these types of debt securities.

In addition, the material specific financial, legal and other terms particular to debt securities of each series will be described in the prospectus supplement relating to the debt securities of that series.

The debt securities will rank equally with all of our other unsecured and unsubordinated debt. The indenture does not limit the amount of debt we may issue under the indenture or otherwise. We may issue the debt securities in one or more series with the same or various maturities, at par or a premium or with original issue discount. We may reopen a previous issue of debt securities and issue additional debt securities of the series.

The prospectus supplement relating to any debt securities being offered will include specific terms relating to the offering. These terms will include some or all of the following:

We may issue debt securities other than the debt securities described in this prospectus. There is no requirement that any other debt securities that we issue be issued under the indenture. Thus, any other debt securities that we issue may be issued under other indentures or documentation, containing provisions different from those included in the indenture or applicable to one or more issues of the debt securities described in this prospectus.

We have agreed not to consolidate with or merge into any other corporation or convey or transfer or lease substantially all of our properties and assets to any person, unless:

(a) the successor corporation expressly assumes by a supplemental indenture the due and punctual payment of the principal of and any premium or any interest on all the debt securities and the performance of every covenant in the indenture that we would otherwise have to perform as if it were an original party to the indenture; and

(b) we deliver to the trustee an officer’s certificate and an opinion of counsel, each stating that the consolidation, merger, conveyance or transfer and the supplemental indenture comply with these provisions.

The successor corporation will assume all our obligations under the indenture as if it were an original party to the indenture. After assuming such obligations, the successor corporation will have all our rights and powers under the indenture.

Under the indenture our rights and obligations and the rights of the holders may be modified if the holders of a majority in aggregate principal amount of the outstanding debt securities of each series affected by the modification consent to it. No modification of the maturity date or principal or interest payment terms, no modification of the currency for payment, no impairment of the right to sue for the enforcement of payment at the maturity of the debt security, no modification of any conversion rights and no modification reducing the percentage required for modifications or modifying the foregoing requirements or redoing the percentage required to waive certain specified covenants, is effective against any holder without its consent.

The supplemental indenture or the form of security for a particular series of debt securities may include additional Events of Default or changes to the Events of Default described above. The Events of Default applicable to a particular series of debt securities will be discussed in the prospectus supplement relating to such series. A default under our other indebtedness will not be a default under the indenture for the debt securities covered by this prospectus, and a default under one series of debt securities will not necessarily be a default under another series. The trustee may withhold notice to the holders of debt securities of any default (except for defaults that involve our failure to pay principal or interest) if it considers such withholding of notice to be in the best interests of the holders.

If an Event of Default with respect to outstanding debt securities of any series occurs and is continuing, then the trustee or the holders of at least 33% in principal amount of outstanding debt securities of that series may declare, in a written notice, the principal amount (or specified amount) plus accrued and unpaid interest on all debt securities of that series to be immediately due and payable. At any time after a declaration of acceleration with respect to debt securities of any series has been made, the holders of a majority in principal amount of the outstanding debt securities may rescind and annul the acceleration if:

We refer you to the prospectus supplement relating to any series of debt securities that are discount securities for the particular provisions relating to acceleration of a portion of the principal amount of the discount securities upon the occurrence of an Event of Default.

If a default in the performance or breach of the indenture shall have occurred and be continuing, the holders of not less than a majority in principal amount of the outstanding securities of all series, by notice to the trustee, may waive any past Event of Default or its consequences under the indenture. However, an Event of Default cannot be waived with respect to any series of securities in the following two circumstances:

Other than its duties in case of a default, the trustee is not obligated to exercise any of its rights or powers under the indenture at the request, order or direction of any holders, unless the holders offer the trustee reasonable indemnity. If they provide this reasonable indemnity, the holders of a majority in principal amount outstanding of any series of debt securities may, subject to certain limitations, direct the time, method and place of conducting any proceeding or any remedy available to the trustee, or exercising any power conferred upon the trustee, for any series of debt securities.

We will pay principal, interest and any premium on fully registered securities at the place or places designated by us for such purposes. We will make payment to the persons in whose names the debt securities are registered on the close of business on the day or days specified by us. Any other payments will be made as set forth in the applicable prospectus supplement. Holders may transfer or exchange fully registered securities at the corporate trust office of the trustee or at any other office or agency maintained by us for such purposes, without the payment of any service charge except for any tax or governmental charge.

We may issue the securities in whole or in part in the form of one or more global securities that will be deposited with, or on behalf of, a depositary identified in the applicable prospectus supplement. We may issue the global securities in either registered or bearer form in either temporary or permanent form. We will describe the specific terms of the depositary arrangement with respect to a series of securities in the applicable prospectus supplement.

You may transfer or exchange certificated securities at any office we maintain for this purpose in accordance with the terms of the indenture. We will not charge a service fee for any transfer or exchange of certificated securities, but we may require payment of a sum sufficient to cover any tax or other governmental charge we are required to pay in connection with a transfer or exchange.

You may effect the transfer of certificated securities and the right to receive the principal, premium and interest on certificated securities only by surrendering the certificate representing those certificated securities and either reissuance by us or the trustee of the certificate to the new holder or the issuance by us or the trustee of a new certificate to the new holder.

The applicable prospectus supplement will describe the specific terms of the depositary arrangement with respect to the applicable securities of that series. We anticipate that the following provisions will apply to all depositary arrangements.

Once a global security is issued, the depositary will credit on its book-entry system the respective principal amounts of the individual securities represented by that global security to the accounts of institutions that have

accounts with the depositary. These institutions are known as participants. The underwriters for the securities will designate the accounts to be credited. However, if we have offered or sold the securities either directly or through agents, we or the agents will designate the appropriate accounts to be credited.

Ownership of beneficial interest in a global security will be limited to participants or persons that may hold beneficial interests through participants. Ownership of beneficial interest in a global security will be shown on, and the transfer of that ownership will be effected only through, records maintained by the depositary’s participants or persons that hold through participants. The laws of some states require that certain purchasers of securities take physical delivery of securities. Such limits and such laws may limit the market for beneficial interests in a global security.

So long as the depositary for a global security, or its nominee, is the registered owner of a global security, the depositary or nominee will be considered the sole owner or holder of the securities represented by the global security for all purposes under the indenture. Except as provided in the applicable prospectus supplement, owners of beneficial interests in a global security:

Payments of principal, any premium and interest on the individual securities registered in the name of the depositary or its nominee will be made to the depositary or its nominee as the holder of that global security. Neither we nor the trustee will have any responsibility or liability for any aspect of the records relating to or payments made on account of beneficial ownership interests of a global security, or for maintaining, supervising or reviewing any records relating to beneficial ownership interests and each of us and the trustee may act or refrain from acting without liability on any information provided by the depositary.

We expect that the depositary, after receiving any payment of principal, any premium or interest in respect of a global security, will immediately credit the accounts of the participants with payment in amounts proportionate to their respective holdings in principal amount of beneficial interest in a global security as shown on the records of the depositary. We also expect that payments by participants to owners of beneficial interests in a global security will be governed by standing customer instructions and customary practices, as is now the case with securities held for the accounts of customers in bearer form or registered in “street name,” and will be the responsibility of such participants.

Debt securities represented by a global security will be exchangeable for debt securities in definitive form of like tenor in authorized denominations only if the depositary notifies us that it is unwilling or unable to continue as the depositary and a successor depositary is not appointed by us within 90 days or we, in our discretion, determine not to require all of the debt securities of a series to be represented by a global security and notify the trustee of our decision.

When we use the term defeasance, we mean discharge from some or all of our obligations under the indenture. If we deposit with the trustee sufficient cash or government securities to pay the principal, interest, any premium and any other sums due to the stated maturity date or a redemption date of the debt securities of a particular series, then at our option:

If this happens, the holders of the debt securities of the affected series will not be entitled to the benefits of the indenture except for registration of transfer and exchange of debt securities and replacement of lost, stolen or mutilated debt securities. Such holders may look only to such deposited funds or obligations for payment.

To exercise our defeasance option, we must deliver to the trustee an opinion of counsel to the effect that the deposit and related defeasance would not cause the holders of the debt securities to recognize income, gain or loss for Federal income tax purposes.

The trustee, JPMorgan Chase Bank, has provided banking and investment services to us in the past and may do so in the future as a part of its regular business.

We may distribute the securities from time to time in one or more transactions at a fixed price or prices, which may be changed, or at market prices prevailing at the time of sale, at prices related to the prevailing market prices or at negotiated prices.

If we use underwriters in the sale, such underwriters will acquire the debt securities for their own account. The underwriters may resell the securities in one or more transactions, including negotiated transactions, at a fixed public offering price or at varying prices determined at the time of sale. The obligations of the underwriters to purchase the securities will be subject to certain conditions. The underwriters will be obligated to purchase all the securities of the series offered if any of the securities are purchased. The underwriters may change from time to time any initial public offering price and any discounts or concessions allowed or re-allowed or paid to dealers.

We may sell offered debt securities through agents designated by us. Unless indicated in the prospectus supplement, the agents have agreed to use their reasonable best efforts to solicit purchases for the period of their appointment.

We may also sell offered debt securities directly. In this case, no underwriters or agents would be involved.

We may from time to time offer debt securities directly to the public, with or without the involvement of agents, underwriters or dealers, and may utilize the Internet or another electronic bidding or ordering system for the pricing and allocation of such debt securities. Such a system may allow bidders to directly participate, through electronic access to an auction site, by submitting conditional offers to buy that are subject to acceptance by us, and which may directly affect the price or other terms at which such securities are sold.

Such a bidding or ordering system may present to each bidder, on a real-time basis, relevant information to assist you in making a bid, such as the clearing spread at which the offering would be sold, based on the bids submitted, and whether a bidder’s individual bids would be accepted, prorated or rejected. Typically the clearing spread will be indicated as a number of basis points above an index treasury note. Other pricing methods may also be used. Upon completion of such an auction process securities will be allocated based on prices bid, terms of bid or other factors.

The final offering price at which debt securities would be sold and the allocation of debt securities among bidders, would be based in whole or in part on the results of the Internet bidding process or auction. Many variations of Internet auction or pricing and allocation systems are likely to be developed in the future, and we may utilize such systems in connection with the sale of debt securities. The specific rules of such an auction would be distributed to potential bidders in an applicable prospectus supplement.

If an offering is made using such a bidding or ordering system you should review the auction rules, as described in the prospectus supplement, for a more detailed description of such offering procedures.

Underwriters, dealers and agents that participate in the distribution of the offered securities may be underwriters as defined in the Securities Act of 1933, and any discounts or commissions received by them from us and any profit on the resale of the offered securities by them may be treated as underwriting discounts and commissions under the Securities Act. We will identify any underwriters or agents, and describe their compensation, in a prospectus supplement.

We may have agreements with the underwriters, dealers and agents to indemnify them against certain civil liabilities, including liabilities under the Securities Act, or to contribute with respect to payments which the underwriters, dealers or agents may be required to make. Underwriters, dealers and agents may engage in transactions with, or perform services for, us or our subsidiaries in the ordinary course of their businesses.

Margaret M. Foran, our Vice President-Corporate Governance and Secretary, will pass upon the validity of the debt securities for us.

The consolidated balance sheets of Pfizer Inc. and Subsidiary Companies as of December 31, 2001 and 2000 and the related consolidated statements of income, shareholders’ equity and cash flows for each of the years in the three-year period ended December 31, 2001, restated to give retroactive effect to the merger on June 19, 2000 with Warner-Lambert Company and its subsidiaries, have been incorporated by reference herein in reliance upon the report of KPMG LLP, independent accountants, also incorporated by reference in this prospectus, and upon the authority of said firm as experts in auditing and accounting.

The audited financial statements of Warner-Lambert Company for the year ended December 31, 1999, not separately presented in this prospectus, have been audited by PricewaterhouseCoopers LLP, independent accountants, whose report thereon is incorporated by reference herein. Such financial statements, to the extent they have been included in the financial statements of Pfizer Inc., have been incorporated by reference in reliance on the report of such independent accountants given on the authority of said firm as experts in auditing and accounting.

With respect to the unaudited interim financial information for the quarters ended March 31, 2002 and June 30, 2002, incorporated by reference, the independent certified public accountants have reported that they applied limited procedures in accordance with professional standards for a review of such information. However, their separate reports included in our quarterly reports on Form 10-Q for the quarters ended March 31, 2002 and June 30, 2002, and incorporated by reference, state that they did not audit and they do not express an opinion on that interim financial information. Accordingly, the degree of reliance on their reports on such information should be restricted in light of the limited nature of the review procedures applied. The accountants are not subject to the liability provisions of Section 11 of the Securities Act of 1933 for their reports on the unaudited interim financial information because those reports are not a “report” or a “part” of the registration statement prepared or certified by the accountants within the meaning of Sections 7 and 11 of the Securities Act.

		Page
Disclosure Notice: Forward Looking Information		S-2
Ratio of Earnings to Fixed Charges		S-3
Use of Proceeds		S-3
Description of Notes		S-3
Underwriting		S-7
Legal Matters		S-8

Prospectus

Where You Can Find More Information		2
The Company		3
Ratio of Earnings to Fixed Charges		3
Use of Proceeds		3
Description of Debt Securities		4
Plan of Distribution		9
Validity of Debt Securities		10
Experts		11

Underwriter	Principal Amount
J.P. Morgan Securities Inc.	$	150,000,000
Morgan Stanley & Co. Incorporated		150,000,000

Total	$	300,000,000

	(Unaudited) Six Months Ended June 30, 2002	Year Ended December 31
		2001	2000	1999	1998	1997
Ratio of earnings to fixed charges	32.1	25.3	11.6	14.7	13.1	10.9

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