Exhibit 3(i)


                          CERTIFICATE OF CORRECTION OF

                          CERTIFICATE OF INCORPORATION

                                       OF

                           SCHERING-PLOUGH CORPORATION

                          Pursuant to N.J.S. 14A:1-6(5)

                              Dated: July 27, 2004


         The undersigned corporation certifies as follows:

         1.   The name of the corporation is Schering-Plough Corporation.

         2.   Section (e) of Article Ninth of the corporation's certificate of
incorporation, which was added by a certificate of amendment filed with the
Secretary of State on or about April 24, 1985 (the "1985 Amendment"), reads as
follows:

                  "(e)   Amendment, Repeal, etc. Notwithstanding anything
         contained in this Certificate of Incorporation to the contrary, the
         affirmative vote of the holders of at least 80% of the voting power of
         all of the shares of the Corporation entitled to vote generally in the
         election of directors, voting together as a single class, shall be
         required to alter, amend, adopt any provision inconsistent with or
         repeal this Article Ninth entitled "Board of Directors", or to alter,
         amend, adopt any provision inconsistent with or repeal Sections 1
         ("Number, Election and Terms"), 2 ("Removal") or 3 ("Newly Created
         Directorships and Vacancies") of Article V ("Directors"), Article VI
         ("Nominations of Director Candidates") or Article X ("Amendment,
         Repeal, etc.") of the By-laws of the Corporation."

         3.   The foregoing is an inaccurate record of the corporate action
authorized and intended by the corporation in connection with adopting the 1985
Amendment.

         4.   The text of Section (e) Article Ninth of the certificate of
incorporation is corrected to read as follows:

                  "(e)   Amendment, Repeal, etc. Notwithstanding anything
         contained in this Certificate of Incorporation to the contrary, the
         affirmative vote of the holders of at least 80% of the voting power of
         all of the shares of the Corporation entitled to vote generally in the
         election of



         directors, voting together as a single class, shall be required to
         alter, amend, adopt any provision inconsistent with or repeal this
         Article Ninth entitled "Board of Directors", or to alter, amend, adopt
         any provision inconsistent with or repeal Sections 1 ("Number, Election
         and Terms"), 2 ("Removal") or 3 ("Newly Created Directorships and
         Vacancies") of Article V ("Directors"), Article VI ("Nominations of
         Director Candidates") or Article IX ("Amendment, Repeal, etc.") of the
         By-laws of the Corporation."

         5.   Article Third of the corporation's certificate of incorporation,
which was amended by a certificate of amendment filed with the Secretary of
State on or about October 1, 1998 (the "1998 Amendment"), reads as follows:

         "Third: The aggregate number of shares which the Corporation shall have
         authority to issue shall be two billion four hundred fifty million
         (2,450,000,000) shares to consist of:

                  (a)   Two billion four hundred million (2,400,000,000) Common
                  Shares of the par value of Fifty Cents ($0.50) per share, and

                  (b)   Fifty million (50,000,000) Preferred Shares of the par
                  value of One Dollar ($1.00) per share issuable in series to
                  consist of:

                           (i)   One million, five hundred thousand (1,500,000)
                           Preferred Shares designated "Series A Junior
                           Participating Preferred Stock," and

                           (ii)  Forty-eight million, five hundred thousand
                           (48,500,000) Preferred Shares whose designations have
                           not yet been determined."

         6.   The foregoing is an inaccurate record of the corporate action
authorized and intended by the corporation in connection with adopting the 1998
Amendment.

         7.   The text of Article Third of the certificate of incorporation is
corrected to read as follows:

         "Third: The aggregate number of shares which the Corporation shall have
         authority to issue shall be two billion four hundred fifty million
         (2,450,000,000) shares to consist of:

                  (a)   Two billion four hundred million (2,400,000,000) Common
                  Shares of the par value of Fifty Cents ($0.50) per share, and


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                  (b)   Fifty million (50,000,000) Preferred Shares of the par
                  value of One Dollar ($1.00) per share issuable in series to
                  consist of:

                           (i)   Twelve million (12,000,000) Preferred Shares
                           designated "Series A Junior Participating Preferred
                           Stock," and

                           (ii)  Thirty-eight million (38,000,000) Preferred
                           Shares whose designations have not yet been
                           determined."

         IN WITNESS WHEREOF, the undersigned corporation has caused this
certificate to be executed on its behalf by its duly authorized officer as of
the date first above written.

                                          SCHERING-PLOUGH CORPORATION



                                          By:_Susan Ellen Wolf
                                             Title: Secretary, Associate General
                                             Counsel and Staff Vice President


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