<PAGE>




Exhibit 24

                                POWER OF ATTORNEY


         WHEREAS, Kendle International Inc., an Ohio corporation (the
"Company"), proposes shortly to file with the Securities and Exchange Commission
under the provisions of the Securities Exchange Act of 1934, as amended, and the
Rules and Regulations thereunder, an annual report on Form 10-K for the year
ended December 31, 2002; and

         WHEREAS, the undersigned is a director of the Company;

         NOW, THEREFORE, the undersigned hereby constitutes and appoints Karl
Brenkert III his attorney, for him and in his name, place and stead, and in his
office and capacity in the Company, to execute and file such annual report on
Form 10-K, and thereafter to execute and file any amendments or supplements
thereto, hereby giving and granting to said attorney full power and authority to
do and perform each and every act and thing whatsoever requisite and necessary
to be done in and about the premises as fully to all intents and purposes as he
might or could do if personally present at the doing thereof, hereby ratifying
and confirming all that said attorney may or shall lawfully do or cause to be
done by virtue hereof.

         IN WITNESS WHEREOF, the undersigned has hereunto set his hand this
______ day of March, 2003.



                                           /s/ Phillip E. Beekman
                                  --------------------------------------------
                                                 (sign name)


                                               Phillip E. Beekman
                                  --------------------------------------------
                                                 (print name)






                                       1
<PAGE>







                                POWER OF ATTORNEY


         WHEREAS, Kendle International Inc., an Ohio corporation (the
"Company"), proposes shortly to file with the Securities and Exchange Commission
under the provisions of the Securities Exchange Act of 1934, as amended, and the
Rules and Regulations thereunder, an annual report on Form 10-K for the year
ended December 31, 2002; and

         WHEREAS, the undersigned is a director of the Company;

         NOW, THEREFORE, the undersigned hereby constitutes and appoints Karl
Brenkert III his attorney, for him and in his name, place and stead, and in his
office and capacity in the Company, to execute and file such annual report on
Form 10-K, and thereafter to execute and file any amendments or supplements
thereto, hereby giving and granting to said attorney full power and authority to
do and perform each and every act and thing whatsoever requisite and necessary
to be done in and about the premises as fully to all intents and purposes as he
might or could do if personally present at the doing thereof, hereby ratifying
and confirming all that said attorney may or shall lawfully do or cause to be
done by virtue hereof.

         IN WITNESS WHEREOF, the undersigned has hereunto set his hand this
19th day of March, 2003.



                                        /s/ G. Steven Geis, Ph.D., M.D.
                                  --------------------------------------------
                                                 (sign name)


                                            G. Steven Geis, Ph.D., M.D.
                                  --------------------------------------------
                                                 (print name)



                                       2
<PAGE>




                                POWER OF ATTORNEY


         WHEREAS, Kendle International Inc., an Ohio corporation (the
"Company"), proposes shortly to file with the Securities and Exchange Commission
under the provisions of the Securities Exchange Act of 1934, as amended, and the
Rules and Regulations thereunder, an annual report on Form 10-K for the year
ended December 31, 2002; and

         WHEREAS, the undersigned is a director of the Company;

         NOW, THEREFORE, the undersigned hereby constitutes and appoints Karl
Brenkert III his attorney, for him and in his name, place and stead, and in his
office and capacity in the Company, to execute and file such annual report on
Form 10-K, and thereafter to execute and file any amendments or supplements
thereto, hereby giving and granting to said attorney full power and authority to
do and perform each and every act and thing whatsoever requisite and necessary
to be done in and about the premises as fully to all intents and purposes as he
might or could do if personally present at the doing thereof, hereby ratifying
and confirming all that said attorney may or shall lawfully do or cause to be
done by virtue hereof.

         IN WITNESS WHEREOF, the undersigned has hereunto set his hand this 18th
day of March, 2003.



                                            /s/ Donald C. Harrison, M.D.
                                  --------------------------------------------
                                                     (sign name)


                                                Donald C. Harrison, M.D.
                                  --------------------------------------------
                                                     (print name)




                                       3
<PAGE>



                                POWER OF ATTORNEY


         WHEREAS, Kendle International Inc., an Ohio corporation (the
"Company"), proposes shortly to file with the Securities and Exchange Commission
under the provisions of the Securities Exchange Act of 1934, as amended, and the
Rules and Regulations thereunder, an annual report on Form 10-K for the year
ended December 31, 2002; and

         WHEREAS, the undersigned is a director of the Company;

         NOW, THEREFORE, the undersigned hereby constitutes and appoints Karl
Brenkert III his attorney, for him and in his name, place and stead, and in his
office and capacity in the Company, to execute and file such annual report on
Form 10-K, and thereafter to execute and file any amendments or supplements
thereto, hereby giving and granting to said attorney full power and authority to
do and perform each and every act and thing whatsoever requisite and necessary
to be done in and about the premises as fully to all intents and purposes as he
might or could do if personally present at the doing thereof, hereby ratifying
and confirming all that said attorney may or shall lawfully do or cause to be
done by virtue hereof.

         IN WITNESS WHEREOF, the undersigned has hereunto set his hand this
14th day of March, 2003.



                                           /s/ Timothy E. Johnson, Ph.D
                                  --------------------------------------------
                                                     (sign name)


                                               Timothy E. Johnson, Ph.D
                                  --------------------------------------------
                                                     (print name)



                                       4
<PAGE>


                                POWER OF ATTORNEY


         WHEREAS, Kendle International Inc., an Ohio corporation (the
"Company"), proposes shortly to file with the Securities and Exchange Commission
under the provisions of the Securities Exchange Act of 1934, as amended, and the
Rules and Regulations thereunder, an annual report on Form 10-K for the year
ended December 31, 2002; and

         WHEREAS, the undersigned is a director of the Company;

         NOW, THEREFORE, the undersigned hereby constitutes and appoints Karl
Brenkert III his attorney, for him and in his name, place and stead, and in his
office and capacity in the Company, to execute and file such annual report on
Form 10-K, and thereafter to execute and file any amendments or supplements
thereto, hereby giving and granting to said attorney full power and authority to
do and perform each and every act and thing whatsoever requisite and necessary
to be done in and about the premises as fully to all intents and purposes as he
might or could do if personally present at the doing thereof, hereby ratifying
and confirming all that said attorney may or shall lawfully do or cause to be
done by virtue hereof.

         IN WITNESS WHEREOF, the undersigned has hereunto set his hand this
14th day of March, 2003.



                                          /s/ Frederick A. Russ, Ph.D
                                  --------------------------------------------
                                                  (sign name)


                                              Frederick A. Russ, Ph.D
                                  --------------------------------------------
                                                  (print name)



                                       5
<PAGE>



                                POWER OF ATTORNEY


         WHEREAS, Kendle International Inc., an Ohio corporation (the
"Company"), proposes shortly to file with the Securities and Exchange Commission
under the provisions of the Securities Exchange Act of 1934, as amended, and the
Rules and Regulations thereunder, an annual report on Form 10-K for the year
ended December 31, 2002; and

         WHEREAS, the undersigned is a director of the Company;

         NOW, THEREFORE, the undersigned hereby constitutes and appoints Karl
Brenkert III his attorney, for him and in his name, place and stead, and in his
office and capacity in the Company, to execute and file such annual report on
Form 10-K, and thereafter to execute and file any amendments or supplements
thereto, hereby giving and granting to said attorney full power and authority to
do and perform each and every act and thing whatsoever requisite and necessary
to be done in and about the premises as fully to all intents and purposes as he
might or could do if personally present at the doing thereof, hereby ratifying
and confirming all that said attorney may or shall lawfully do or cause to be
done by virtue hereof.

         IN WITNESS WHEREOF, the undersigned has hereunto set his hand this 14th
day of March, 2003.



                                              /s/ Robert C. Simpson
                                  --------------------------------------------
                                                    (sign name)


                                                  Robert C. Simpson
                                  --------------------------------------------
                                                    (print name)







                                       6