UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                ----------------

                                   SCHEDULE TO
                               (Amendment No. 15)
            Tender Offer Statement under Section 14(d)(1) or 13(e)(1)
                     of the Securities Exchange Act of 1934

                                     AVENTIS
                       (Name of Subject Company (Issuer))

                                 SANOFI-AVENTIS
                        (Name of Filing Person (Offeror))
                                ----------------

                                Ordinary Shares,
                   nominal value (euro)3.82 per Ordinary Share
                         (Title of Class of Securities)

                              ISIN No. FR0000130460
                      (CUSIP Number of Class of Securities)
                                ----------------

                           American Depositary Shares
                     (each representing one Ordinary Share)
                         (Title of Class of Securities)

                                    053561106
                      (CUSIP Number of Class of Securities)
                                ----------------

                                  John Spinnato
                  General Counsel, Vice President and Secretary
                             Sanofi-Synthelabo Inc.
                                 90 Park Avenue
                               New York, NY 10016
                              Tel : (212) 551-4000
            (Name, address and telephone number of person authorized
      to receive notices and communications on behalf of the filing person)

                                   Copies to:

             Jean-Claude Leroy                    David A. Katz, Esq.
           Senior Vice President             Wachtell, Lipton, Rosen & Katz
              Sanofi-Aventis                      51 West 52nd Street
           174 avenue de France                 New York, New York 10019
            75013 Paris, France                      (212) 403-1000
         Tel : + 33 1 53 77 40 00

|_|      Check the box if the filing relates solely to preliminary
         communications made before commencement of a tender offer.

Check the appropriate boxes below to designate any transactions to which this
statement relates:

|X|      Third party tender offer subject to Rule 14d-1

|_|      Issuer tender offer subject to Rule 13e-4

|_|      Going private transaction subject to Rule 13e-3

|_|      Amendment to Schedule 13D under Rule 13d-2

Check the following box if the filing is a final amendment reporting the results
of the tender offer: |X|






         Sanofi-Aventis,  a French societe  anonyme,  amends and supplements its
Tender Offer  Statement on Schedule TO, as amended (the  "Schedule  TO"),  filed
initially with the United States Securities and Exchange Commission on April 12,
2004 in  connection  with  Sanofi-Aventis's  offer to acquire  (1) all  ordinary
shares,  nominal  value  (euro)3.82  per share,  of  Aventis,  a French  societe
anonyme,  that are held by holders who are located in the United  States and (2)
all  American  Depositary  Shares of Aventis  (each an "Aventis  ADS",  and each
Aventis ADS representing  one Aventis ordinary share),  held by holders wherever
located,  pursuant to the terms and subject to the  conditions  set forth in the
definitive  Prospectus,  dated  April 9,  2004,  and the  definitive  Prospectus
Supplement, dated May 27, 2004 (collectively, the "Prospectus"), and the related
amended ADS Letter of Transmittal  and amended Form of Acceptance  (collectively
with the Prospectus,  and as amended and supplemented  hereby, the "Revised U.S.
Offer").  This amendment  constitutes Amendment No. 15 to the Schedule TO and is
the final amendment reporting the results of the tender offer. Capitalized terms
not  otherwise  defined  herein shall have the meanings  ascribed to them in the
Schedule TO.

         In reliance on Section  13(d)(6)(A) of the  Securities  Exchange Act of
1934, as amended (the "Exchange Act"),  Sanofi-Aventis  has not filed a Schedule
13D to report its  acquisition of the Aventis  ordinary  shares  pursuant to its
offers.  Sanofi-Aventis  intends to make any required filings on Schedule 13G in
accordance with Rule 13d-1(d).

ITEM 1.  SUMMARY TERM SHEET

         Item  1  is  amended  and   supplemented   to  include  the   following
information:

         On  September  16,  2004,  Sanofi-Aventis  announced  that  the AMF had
published the definitive results of Sanofi-Aventis's offer for Aventis after the
subsequent  offering period.  These results indicated that, as of the expiration
of the  subsequent  offering  period at 5:00  p.m.  (Eastern  Daylight  Time) on
September 6, 2004,  in  aggregate,  an additional  21,397,038  Aventis  ordinary
shares had been  tendered  into the French,  German and U.S.  offers  during the
subsequent offer period (including an additional 709,640 Aventis ordinary shares
underlying the Aventis ADSs tendered  during the subsequent  offering  period of
the U.S.  offer).  When combined with the  769,920,773  Aventis  ordinary shares
tendered into the offers during the initial  offering periods that ended on July
30, 2004 (including  24,137,576  Aventis ordinary shares  underlying the Aventis
ADSs tendered in the U.S.  offer),  these results  indicate that  Sanofi-Aventis
will hold 791,317,811  Aventis ordinary shares  representing 98.03% of the share
capital and 98.09% of the voting rights of Aventis,  based on 807,204,134 shares
and 806,750,129  voting rights  outstanding as of August 31, 2004.  After giving
effect to the offers, on a fully-diluted basis,  Sanofi-Aventis will hold 92.44%
of the share capital and 92.49% of the voting rights of Aventis.

         The following  table  summarizes the number of Aventis  ordinary shares
(including  Aventis  ordinary  shares  represented  by  Aventis  ADSs) that were
accepted  pursuant to the standard  entitlement,  the all stock election and the
all cash  election,  respectively,  after  giving  effect to the  proration  and
allocation adjustments described in the Revised U.S. Offer:



                                                                                                

                                                                SUBSEQUENT OFFERING
                                INITIAL OFFERING PERIOD               PERIOD (ENDED
ACCEPTED PURSUANT TO:             (ENDED JULY 30, 2004)          SEPTEMBER 6, 2004)                   TOTAL
----------------------------------------------------------------------------------------------------------------
STANDARD ENTITLEMENT                        664,561,361                   14,754,784            679,316,145
ALL STOCK ELECTION                           75,690,733                    4,771,829             80,462,562
ALL CASH ELECTION                            29,668,679                    1,870,425             31,539,104
                                        ---------------              ---------------          -------------
TOTAL                                       769,920,773                   21,397,038            791,317,811



ITEM 4.  TERMS OF THE TRANSACTION

          Item 4 is amended and supplemented to include the information set
forth above under Item 1, which is incorporated in this Item 4 by reference.



ITEM 12.  EXHIBITS

          Item 12 is amended and supplemented to include the following exhibits:

                 (a)(5)(xxxx)        Presentation announcing the birth of
                                     Sanofi-Aventis first given to employees on
                                     September 15, 2004, and subsequently made
                                     available on the Sanofi-Aventis website
                                     (incorporated herein by reference to the
                                     filing made by Sanofi-Aventis pursuant to
                                     Rule 425(a) on September 15, 2004)

                 (a)(5)(xxxxi)       Press Release, dated September 16, 2004,
                                     announcing definitive results of the
                                     French, U.S. and German Offers after the
                                     subsequent offering periods (incorporated
                                     herein by reference to the filing made by
                                     Sanofi-Aventis pursuant to Rule 425(a) on
                                     September 16, 2004)

                 (a)(5)(xxxxii)      Press Release, dated September 16, 2004,
                                     announcing the new logo of Sanofi-Aventis
                                     (incorporated herein by reference to the
                                     filing made by Sanofi-Aventis pursuant to
                                     Rule 425(a) on September 16, 2004)








                                    SIGNATURE

                  After due inquiry and to the best of my knowledge and belief,
I certify that the information set forth in this Schedule TO is true, complete
and correct.

                                  SANOFI-AVENTIS


September 16, 2004                By    /s/ JEAN-CLAUDE LEROY
                                        ----------------------------------------
                                  Name:  Jean-Claude Leroy
                                  Title: Senior Vice President and
                                         Chief Financial Officer










                                  EXHIBIT INDEX

      EXHIBIT
      NUMBER                                             DESCRIPTION
      -------                                            -----------


(a)(1)(i)       ADS Letter of Transmittal (Aventis ADSs)*


(a)(1)(ii)      Notice of Guaranteed Delivery (Aventis ADSs)*

(a)(1)(iii)     Letter to Brokers,  Dealers,  Commercial Banks,  Trust Companies
                and Other Nominees (Aventis ADSs)*

(a)(1)(iv)      Letter to Clients from Brokers, Dealers, Commercial Banks, Trust
                Companies and other Nominees (Aventis ADSs)*

(a)(1)(v)       Guidelines for Certification of Taxpayer  Indemnification Number
                on Substitute Form W-9*

(a)(1)(vi)      Form of Acceptance for Aventis Ordinary Shares*

(a)(1)(vii)     Technical  Notice to French  Financial  Intermediaries  and U.S.
                Custodians (Aventis ordinary shares)*

(a)(1)(viii)    Letter to Clients from Brokers, Dealers, Commercial Banks, Trust
                Companies and other Nominees (Aventis ordinary shares)*

(a)(1)(ix)      ADS  Letter  of   Transmittal   (Aventis   ADSs)  (Revised  U.S.
                Offer)****

(a)(1)(x)       Notice of  Guaranteed  Delivery  (Aventis  ADSs)  (Revised  U.S.
                Offer) ****

(a)(1)(xi)      Letter to Brokers,  Dealers,  Commercial Banks,  Trust Companies
                and Other Nominees (Aventis ADSs) (Revised U.S. Offer) ****

(a)(1)(xii)     Letter to Clients from Brokers, Dealers, Commercial Banks, Trust
                Companies and other Nominees (Aventis ADSs) (Revised U.S. Offer)
                ****

(a)(1)(xiii)    Form of Acceptance  for Aventis  Ordinary  Shares  (Revised U.S.
                Offer) ****

(a)(1)(xiv)     Technical  Notice to French  Financial  Intermediaries  and U.S.
                Custodians (Aventis ordinary shares) (Revised U.S. Offer) ****

(a)(1)(xv)      Letter to Clients from Brokers, Dealers, Commercial Banks, Trust
                Companies and other Nominees  (Aventis ordinary shares) (Revised
                U.S. Offer) ****

(a)(2)          None

(a)(3)          Not applicable

(a)(4)          Prospectus,   dated  April  9,  2004  (incorporated   herein  by
                reference  to the filing made by  Sanofi-Synthelabo  pursuant to
                Rule 424(b)(5) on April 12, 2004 (File no: 333-112314))

(a)(4)(ii)      Preliminary   Prospectus   Supplement,   dated   May   4,   2004
                (incorporated  herein by reference to  Post-Effective  Amendment
                No. 1 to Sanofi-Synthelabo's Registration Statement on Form F-4,
                dated May 5, 2004 (File no: 333-112314))

(a)(4)(iii)     Definitive   Prospectus   Supplement,   dated   May   27,   2004
                (incorporated   herein  by  reference  to  the  filing  made  by
                Sanofi-Synthelabo  pursuant  to Rule  424(b)(5)  on May 28, 2004
                (File no: 333-112314))

(a)(5)(i)       Press release  announcing  the offer for Aventis,  dated January
                26, 2004 (incorporated herein by reference to the filing made by
                Sanofi-Synthelabo pursuant to Rule 425(a) on January 26, 2004)

(a)(5)(ii)      Press release announcing commencement of U.S. offer, dated April
                12, 2004 (incorporated herein by reference to the filing made by
                Sanofi-Synthelabo pursuant to Rule 425(a) on April 12, 2004)

(a)(5)(iii)     Text  of  newspaper  advertisement  dated  April  12,  2004  and
                published in the Wall Street Journal*

(a)(5)(iv)      Press  release  announcing  the  entry  into an  agreement  with
                GlaxoSmithKline   regarding  the   divestiture   of  Arixtra(R),
                Fraxiparine(R)   and  related  assets,   dated  April  13,  2004
                (incorporated   herein  by  reference  to  the  filing  made  by
                Sanofi-Synthelabo pursuant to Rule 425(a) on April 13, 2004)

(a)(5)(v)       Press release  announcing  the decision of Board of Directors of
                Sanofi-Synthelabo to distribute an



      EXHIBIT
      NUMBER                                             DESCRIPTION
      -------                                            -----------


                interim dividend,  dated April 15, 2004 (incorporated  herein by
                reference  to the filing made by  Sanofi-Synthelabo  pursuant to
                Rule 425(a) on April 15, 2004)

(a)(5)(vi)      Complaint of Aventis,  dated April 19, 2004, filed in the United
                States District Court for the District of New Jersey**

(a)(5)(vii)     Press release  announcing  improved friendly offer,  dated April
                26,    2004    (incorporated     herein    by    reference    to
                Sanofi-Synthelabo's  Form 6-K  furnished to the SEC on April 26,
                2004)

(a)(5)(viii)    Presentation given by Mr.  Jean-Francois Dehecq in Paris, France
                at an Information Meeting announcing the improved friendly offer
                (incorporated   herein  by  reference  to  the  filing  made  by
                Sanofi-Synthelabo pursuant to Rule 425(a) on April 26, 2004)

(a)(5)(ix)      Press release announcing the European  Commission's  approval of
                the proposed acquisition of Aventis by Sanofi-Synthelabo,  dated
                April 27, 2004  (incorporated  herein by reference to the filing
                made by  Sanofi-Synthelabo  pursuant to Rule 425(a) on April 27,
                2004)

(a)(5)(x)       Press release announcing the postponement of the general meeting
                of   Sanofi-Synthelabo   shareholders,   dated   May   4,   2004
                (incorporated   herein  by  reference  to  the  filing  made  by
                Sanofi-Synthelabo pursuant to Rule 425(a) on May 4, 2004)

(a)(5)(xi)      Press  release  announcing  issuance of request  for  additional
                information by U.S. Federal Trade Commission,  dated May 5, 2004
                (incorporated   herein  by  reference  to  the  filing  made  by
                Sanofi-Synthelabo pursuant to Rule 425(a) on May 5, 2004)

(a)(5)(xii)     Press  release  announcing  rescheduling  of general  meeting of
                Sanofi-Synthelabo  shareholders for June 23, 2003, dated May 14,
                2004  (incorporated  herein by  reference  to the filing made by
                Sanofi-Synthelabo pursuant to Rule 425(a) on May 14, 2004)

(a)(5)(xiii)    Press  release  announcing,  among other  things,  nominees  for
                election as directors of  Sanofi-Synthelabo,  dated May 26, 2004
                (incorporated   herein  by  reference  to  the  filing  made  by
                Sanofi-Synthelabo pursuant to Rule 425(a) on May 26, 2004)

(a)(5)(xiv)     Press  release  announcing  extension of U.S.  offer to June 30,
                2004, dated May 26, 2004,  (incorporated  herein by reference to
                the filing made by Sanofi-Synthelabo  pursuant to Rule 425(a) on
                May 26, 2004)

(a)(5)(xv)      Text of newspaper advertisement dated May 28, 2004 and published
                in the Wall Street Journal****

(a)(5)(xvi)     Press release confirming  extension of U.S. offer until June 30,
                2004,  dated June 1, 2004  (incorporated  herein by reference to
                the filing made by Sanofi-Synthelabo  pursuant to Rule 425(a) on
                June 1, 2004)

(a)(5)(xvii)    Press release  regarding new indications  for Arixtra(R),  dated
                June 4, 2004  (incorporated  herein by  reference  to the filing
                made by  Sanofi-Synthelabo  pursuant  to Rule  425(a) on June 4,
                2004)

(a)(5)(xviii)   Employee  communication  regarding the offers,  published in "La
                Lettre Bleue No. 2", dated June 7, 2004 (incorporated  herein by
                reference  to the filing made by  Sanofi-Synthelabo  pursuant to
                Rule 425(a) on June 7, 2004)

(a)(5)(xix)     Press release  announcing  adjusted  offer  consideration  after
                confirmation   of  Aventis   dividend,   dated  June  14,   2004
                (incorporated   herein  by  reference  to  the  filing  made  by
                Sanofi-Synthelabo pursuant to Rule 425(a) on June 14, 2004)

(a)(5)(xx)      Press  Release,  dated  June  21,  2004,  announcing  the  draft
                structure of SANOFI-AVENTIS  Management Committee  (incorporated
                herein by  reference  to the  filing  made by  Sanofi-Synthelabo
                pursuant to Rule 425(a) on June 22, 2004)

(a)(5)(xxi)     Press  Release,  dated  June  22,  2004,  announcing  the  AMF's
                decision to postpone  the  closing  date of  Sanofi-Synthelabo's
                Offer for Aventis  until July 30, 2004  (incorporated  herein by
                reference  to the filing made by  Sanofi-Synthelabo  pursuant to
                Rule 425(a) on June 22, 2004)

(a)(5)(xxii)    Press Release,  dated June 23, 2004, confirming the extension of
                the  U.S.   Offer,   the  French  Offer  and  the  German  Offer
                (incorporated   herein  by  reference  to  the  filing  made  by
                Sanofi-Synthelabo



      EXHIBIT
      NUMBER                                             DESCRIPTION
      -------                                            -----------


                pursuant to Rule 425(a) on June 23, 2004)

(a)(5)(xxiii)   Presentation  given  by  Mr.   Jean-Francois  Dehecq  and  other
                Sanofi-Synthelabo  executives in Paris, France at Annual General
                Meeting  of  Sanofi-Synthelabo  shareholders  on June  23,  2004
                (incorporated   herein  by  reference  to  the  filing  made  by
                Sanofi-Synthelabo pursuant to Rule 425(a) on June 23, 2004)

(a)(5)(xxiv)    Press  Release,  dated June 24, 2004,  announcing the results of
                Annual  General   Meeting  of   Sanofi-Synthelabo   shareholders
                (incorporated   herein  by  reference  to  the  filing  made  by
                Sanofi-Synthelabo pursuant to Rule 425(a) on June 24, 2004)

(a)(5)(xxv)     Press   Release,   dated   June  25,   2004,   announcing   that
                Sanofi-Synthelabo  and Pfizer have concluded an agreement on the
                divestment   of   Campto(R)   (Irinotecan),   conditional   upon
                completion    of    Sanofi-Synthelabo's    offer   for   Aventis
                (incorporated   herein  by  reference  to  the  filing  made  by
                Sanofi-Synthelabo pursuant to Rule 425(a) on June 25, 2004)

(a)(5)(xxvi)    Press  Release,  dated July 15, 2004,  announcing  that the U.S.
                Federal Trade  Commission's  Bureau of Competition and Economics
                has  completed  its  review  of   Sanofi-Synthelabo's   proposed
                acquisition of Aventis  (incorporated herein by reference to the
                filing made by Sanofi-Synthelabo pursuant to Rule 425(a) on July
                15, 2004)

(a)(5)(xxvii)   Press    Release,    dated    July    21,    2004,    announcing
                Sanofi-Synthelabo's  consolidated  sales for the  first  half of
                2004  (incorporated  herein by  reference  to the filing made by
                Sanofi-Synthelabo pursuant to Rule 425(a) on July 21, 2004)

(a)(5)(xxviii)  Press  Release,  dated July 29, 2004,  announcing  that the U.S.
                Federal  Trade   Commission  has  accepted   Sanofi-Synthelabo's
                consent decree  (incorporated  herein by reference to the filing
                made by  Sanofi-Synthelabo  pursuant  to Rule 425(a) on July 29,
                2004)

(a)(5)(xxix)    Press Release, dated July 31, 2004, announcing the expiration of
                the tender  period  for  Sanofi-Synthelabo's  offer for  Aventis
                (incorporated   herein  by  reference  to  the  filing  made  by
                Sanofi-Synthelabo pursuant to Rule 425(a) on August 2, 2004)

(a)(5)(xxx)     Press Release,  dated August 9, 2004, announcing the provisional
                results of  Sanofi-Synthelabo's  offer for Aventis (incorporated
                herein by  reference  to the  filing  made by  Sanofi-Synthelabo
                pursuant to Rule 425(a) on August 9, 2004)

(a)(5)(xxxi)    Press Release,  dated August 12, 2004, announcing the definitive
                results of  Sanofi-Synthelabo's  offer for Aventis (incorporated
                herein by  reference  to the  filing  made by  Sanofi-Synthelabo
                pursuant to Rule 425(a) on August 12, 2004)

(a)(5)(xxxii)   English  translation  of text of  advertisement  required  to be
                published by  Sanofi-Synthelabo in Les Echos on August 13, 2004,
                announcing  the  opening  of  the  subsequent   offering  period
                (incorporated   herein  by  reference  to  the  filing  made  by
                Sanofi-Synthelabo pursuant to Rule 425(a) on August 13, 2004)

(a)(5)(xxxiii)  Press Release,  dated August 20, 2004,  announcing the change in
                name of  Sanofi-Synthelabo  to Sanofi-Aventis and the settlement
                of the offers  (incorporated  herein by  reference to the filing
                made by Sanofi-Synthelabo  pursuant to Rule 425(a) on August 20,
                2004)

(a)(5)(xxxiv)   Press Release, dated August 30, 2004, announcing the appointment
                of  Olivier  Jacquesson  as  head  of  Business  Development  of
                Sanofi-Aventis  (incorporated  herein by reference to the filing
                made by  Sanofi-Aventis  pursuant  to Rule  425(a) on August 30,
                2004)

(a)(5)(xxxv)    Press Release,  dated August 31, 2004, announcing the results of
                Sanofi-Synthelabo  for the  first  half  of  2004  (incorporated
                herein  by  reference  to  the  filing  made  by  Sanofi-Aventis
                pursuant to Rule 425(a) on August 31, 2004)

(a)(5)(xxxvi)   Presentation, dated August 31, 2004, given by representatives of
                Sanofi-Aventis  during a conference call for financial analysts,
                institutional  investors  and  journalists  on August  31,  2004
                (incorporated   herein  by  reference  to  the  filing  made  by
                Sanofi-Aventis pursuant to Rule 425(a) on August 31, 2004)

(a)(5)(xxxvii)  Advertisement  summarizing  Sanofi-Synthelabo's  results for the
                first half of 2004 published in the


      EXHIBIT
      NUMBER                                             DESCRIPTION
      -------                                            -----------

                Financial  Times  --  European  Edition  on  September  3,  2004
                (incorporated   herein  by  reference  to  the  filing  made  by
                Sanofi-Aventis pursuant to Rule 425(a) on September 3, 2004)

(a)(5)(xxxviii) English  translation of text of a required  advertisement  to be
                published  by  Sanofi-Aventis  in Le Figaro on September 4, 2004
                and  in  Les  Echos  on  September  6,  2004),  announcing  that
                Sanofi-Aventis  is studying the  possibility of merging  Aventis
                into  Sanofi-Aventis  (incorporated  herein by  reference to the
                filing  made  by  Sanofi-Aventis  pursuant  to  Rule  425(a)  on
                September 3, 2004)

(a)(5)(xxxix)   Press Release,  dated September 7, 2004,  announcing  closing of
                subsequent  offering  periods  in the  French,  U.S.  and German
                Offers  (incorporated  herein by reference to the filing made by
                Sanofi-Aventis pursuant to Rule 425(a) on September 7, 2004)

(a)(5)(xxxx)    Presentation  announcing the birth of Sanofi-Aventis first given
                to employees  on  September  15,  2004,  and  subsequently  made
                available on the Sanofi-Aventis  website (incorporated herein by
                reference to the filing made by Sanofi-Aventis  pursuant to Rule
                425(a) on September 15, 2004)

(a)(5)(xxxxi)   Press Release,  dated September 16, 2004,  announcing definitive
                results  of  the  French,  U.S.  and  German  Offers  after  the
                subsequent offering periods (incorporated herein by reference to
                the filing  made by  Sanofi-Aventis  pursuant  to Rule 425(a) on
                September 16, 2004)

(a)(5)(xxxxii)  Press Release, dated September 16, 2004, announcing the new logo
                of  Sanofi-Aventis  (incorporated  herein  by  reference  to the
                filing  made  by  Sanofi-Aventis  pursuant  to  Rule  425(a)  on
                September 16, 2004)

(b)(1)          Credit Facility  Agreement,  dated 25 January 2004 (incorporated
                herein  by  reference  to  Exhibit  10.4  to  the   Registration
                Statement  on Form F-4  filed  by  Sanofi-Synthelabo  (File  No.
                333-112314))

(b)(2)          Credit  Facility  Agreement,  dated 26 April 2004  (incorporated
                herein  by  reference  to  Exhibit  10.5  of the  Post-Effective
                Amendment No. 1 to Sanofi-Synthelabo's Registration Statement on
                Form F-4, dated May 5, 2004 (File no: 333-112314))

(d)(1)          Agreement,  dated April 25, 2004, between  Sanofi-Synthelabo and
                Aventis***

(d)(2)          Letter  from  Mr.   Jean-Francois  Dehecq  to  Mr.  Igor  Landau
                confirming   certain  severance  and  other   employment-related
                benefits of Mr. Landau***

(d)(3)          Amendment Agreement,  dated May 19, 2004, amending Schedule 1 to
                the  Agreement,  dated  April  25,  2004,  between  Aventis  and
                Sanofi-Synthelabo  (incorporated  herein by reference to Exhibit
                99.1 to  Sanofi-Synthelabo's  Form 6-K, dated May 21, 2004 (File
                No. 001-31368))

(g)             None

(h)(1)          Opinion of  Wachtell,  Lipton,  Rosen & Katz  regarding  certain
                United States federal income tax matters (incorporated herein by
                reference to Exhibit 8.1 to the  Registration  Statement on Form
                F-4 filed by Sanofi-Synthelabo (File No. 333-112314))

(h)(2)          Opinion of  Linklaters  regarding  certain  French  tax  matters
                (incorporated   herein  by  reference  to  Exhibit  8.2  to  the
                Registration  Statement  on Form F-4 filed by  Sanofi-Synthelabo
                (File No. 333-112314))

--------------------

*   Previously filed on Schedule TO dated April 12, 2004.
**  Previously filed on Amendment No. 1 to the Schedule TO dated April 20, 2004.
*** Previously filed on Amendment No. 2 to the Schedule TO dated April 26, 2004.
**** Previously filed on Amendment No. 4 to the Schedule TO dated May 28, 2004.