Filed by Sanofi-Aventis
  Pursuant to Rule 165 and Rule 425(a) under the United States Securities Act of
                                                                1933, as amended

                                                        Subject Company: Aventis
                                                   Commission File No. 001-10378
                                                           Date: August 30, 2004


         On August 30, 2004, Sanofi-Aventis (formerly known as
Sanofi-Synthelabo) issued the following press release.

         In connection with the proposed acquisition of Aventis,  Sanofi-Aventis
(formerly  known  as  Sanofi-Synthelabo)   has  filed  with  the  United  States
Securities and Exchange  Commission (SEC), a registration  statement on Form F-4
(File no: 333-112314),  which includes a prospectus and a prospectus  supplement
relating to the revised offer, and related exchange offer materials, to register
the  Sanofi-Aventis  ordinary shares (including  Sanofi-Aventis  ordinary shares
represented  by  Sanofi-Aventis  ADSs) to be  issued  in  exchange  for  Aventis
ordinary  shares  held by holders  located in the United  States and for Aventis
ADSs  held by  holders  wherever  located  and has  also  filed  with  the SEC a
Statement  on  Schedule  TO.  INVESTORS  AND HOLDERS OF AVENTIS  SECURITIES  ARE
STRONGLY  ADVISED TO READ THE  REGISTRATION  STATEMENT  AND THE  PROSPECTUS  AND
PROSPECTUS  SUPPLEMENT  RELATING TO THE REVISED OFFER, THE STATEMENT ON SCHEDULE
TO,  AND ANY  OTHER  RELEVANT  DOCUMENTS  FILED  WITH  THE  SEC,  AS WELL AS ANY
AMENDMENTS AND SUPPLEMENTS BECAUSE THEY CONTAIN IMPORTANT INFORMATION. Investors
and holders of Aventis  securities  may obtain  free copies of the  registration
statement,  the prospectus,  the prospectus  supplement  relating to the revised
offer and related exchange offer materials, and the Statement on Schedule TO, as
well as other  relevant  documents  filed with the SEC, at the SEC's web site at
www.sec.gov.  The prospectus,  the prospectus supplement relating to the revised
offer and  other  transaction-related  documents  have  been  mailed to  Aventis
securityholders  eligible to participate in the U.S. offer and additional copies
may be obtained for free from MacKenzie  Partners,  Inc., the information  agent
for the U.S. offer, at the following address: 105, Madison Avenue, New York, New
York 10016;  telephone  1-(212)  929-5500  (call  collect)  or 1-(800)  322-2885
(toll-free call); e-mail proxy@mackenziepartners.com.


                                     * * * *





                                                                  SANOFI-AVENTIS

INVESTOR RELATIONS



             OLIVIER JACQUESSON BECOMES HEAD OF BUSINESS DEVELOPMENT



PARIS,  AUGUST  30TH  2004 - Thomas  HOFSTAETTER  will be  replaced  by  Olivier
JACQUESSON to head the Business Development division. He will be a member of the
Sanofi-Aventis  Management  Committee and will report directly to  Jean-Francois
DEHECQ, Chairman and CEO.

Olivier  JACQUESSON has had a long career within the Group he joined in 1976. He
was head of the Roussel-Uclaf  subsidiaries in Belgium and Mexico.  After having
managed several  divisions,  he became head of  Roussel-Uclaf  worldwide.  Since
1997, he has managed the  France-based  businesses of Hoechst Marion Roussel and
then the marketing activities of Aventis in France.



In accordance with article 7 of the COB rule no. 2002-04, this press release was
transmitted to the Autorite des marches financiers (AMF) before its publication.

IMPORTANT  INFORMATION
In connection with the proposed acquisition of Aventis, Sanofi-Aventis (formerly
Sanofi-Synthelabo)  has  filed a  registration  statement  on Form F-4 (File no.
333-112314),  including a prospectus and a prospectus supplement relating to the
revised offer,  and will file additional  documents with the SEC.  Investors are
urged to read the  registration  statement,  including  the  prospectus  and the
prospectus  supplement  relating to the revised  offer,  and any other  relevant
documents filed with the SEC, including all amendments and supplements,  because
they contain important information.  Free copies of the registration  statement,
as well as other relevant  documents  filed with the SEC, may be obtained at the
SEC's web site at  www.sec.gov.  The prospectus  and the  prospectus  supplement
relating to the revised offer and other transaction-related  documents are being
mailed to Aventis security holders eligible to participate in the U.S. offer and
additional  copies may be obtained for free from MacKenzie  Partners,  Inc., the
information  agent for the U.S. offer, at the following  address:  105,  Madison
Avenue, New York, New York 10016; telephone:  1-(212) 929-5500 (call collect) or
1-(800) 322-2885 (toll-free call); e-mail proxy@mackenziepartners.com.

In France,  holders of Aventis  securities  are  requested,  with respect to the
offer,   to   refer   to   the   prospectus   supplement   (note   d'information
complementaire),  which has been granted visa number 04-384 by the AMF and which
is  available  on the website of the AMF  (www.amf-france.org)  and without cost
from: BNP Paribas Securities Services,  GIS-Emetteurs,  Service Logistique,  Les
Collines de l'Arche,  75450  Paris Cedex 9 and to the  recommendation  statement
(note d'information en reponse) which has been granted visa number 04-510.

The public offer to holders of Aventis  ordinary  shares located in Germany (the
"German  Offer")  is being made in  accordance  with  applicable  German law and
pursuant  to an offer  document/sales  prospectus,  which is  available  free of
charge at BNP Paribas Securities Services, Gruneburgweg 14, D-60322 Frankfurt am
Main   (Fax:   069  -  152  05  277)  and  on  the   website   of  the   Company
(www.sanofi-synthelabo.com).  Any decision to tender Aventis  ordinary shares in
exchange for Sanofi-Aventis ordinary shares under the German Offer must be taken
exclusively with regard to the terms and conditions of the German Offer, as well
as  with  regard  to  the  information  included  in  the  offer  document/sales
prospectus, including any amendments thereto, issued in Germany.

The  French  Offer,  the U.S.  Offer and the  German  Offer  are  being  made on
substantially  the same terms and  completion  of these offers is subject to the
same  conditions.  It is intended that the  subsequent  offering  periods in the
three offers will expire at the same time.

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This press  release does not  constitute an offer to purchase or exchange or the
solicitation  of an offer to sell or exchange  any  securities  of Aventis or an
offer to sell or exchange or the solicitation of an offer to buy or exchange any
securities  of  Sanofi-Aventis,  nor  shall  there  be any sale or  exchange  of
securities in any jurisdiction  (including the United States, Germany, Italy and
Japan) in which such offer,  solicitation  or sale or exchange would be unlawful
prior to the registration or qualification  under the laws of such jurisdiction.
The distribution of this communication may, in some countries,  be restricted by
law or  regulation.  Accordingly,  persons  who  come  into  possession  of this
document  should  inform  themselves  of and  observe  these  restrictions.  The
solicitation  of  offers  to  buy  Sanofi-Aventis   ordinary  shares  (including
Sanofi-Aventis ordinary shares represented by Sanofi-Aventis ADSs) in the United
States will only be made pursuant to a prospectus  and related  offer  materials
that  Sanofi-Aventis  expects  to send to holders  of  Aventis  securities.  The
Sanofi-Aventis   ordinary  shares  (including   Sanofi-Aventis  ordinary  shares
represented  by  Sanofi-Aventis  ADSs) may not be sold, nor may offers to buy be
accepted,  in the United  States  prior to the time the  registration  statement
becomes effective.  No offering of securities shall be made in the United States
except by means of a prospectus  meeting the  requirements  of Section 10 of the
United States Securities Act of 1933, as amended.

Investors  and  security  holders  may obtain a free copy of the Form 20-F filed
with the SEC on April 2, 2004 and any other  documents  filed by  Sanofi-Aventis
with the SEC at www.sec.gov and may obtain the Reference Document filed with the
AMF on April 2, 2004 (No.  04-0391)  and other  documents  filed with the AMF at
www.amf-france.org.   Free   copies   may  also  be   obtained   directly   from
Sanofi-Aventis on our web site at: www.sanofi-synthelabo.com.



INVESTOR RELATIONS DEPARTMENT
Philippe Goupit         Director of Investor Relations
Arnaud Delepine         Investor Relations Europe
Sanjay Gupta            Investor Relations US
Anne d'Halluin-Sulzer   Investor Relations
Loic Gonnet             Investor Relations

CONTACTS:
E-mail: investor-relations@sanofi-synthelabo.com
Europe                          US
Tel: + 33 1 53 77 45 45         Tel.:  + 1 212 551 40 18
Fax: + 33 1 53 77 42 96         Fax:   + 1 646 487 40 18

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