Exhibit 24POWER OF ATTORNEYWHEREAS, Kendle International Inc., an Ohio corporation (the “Company”), proposes to file with theSecurities and Exchange Commission under the provisions of the Securities Exchange Act of 1934, asamended, and the Rules and Regulations thereunder, an Annual Report on Form 10-K for the year endedDecember 31, 2006; and     WHEREAS, the undersigned is a director of the Company;     NOW, THEREFORE, the undersigned hereby constitutes and appoints Karl Brenkert III and JarrodB. Pontius, acting individually, his attorney, for him and in his name, place and stead, and insuch appointee’s office and capacity in the Company, to execute and file such Annual Report on Form10-K, and thereafter to execute and file any amendments or supplements thereto, hereby giving andgranting to said attorney full power and authority to do and perform each and every act and thingwhatsoever requisite and necessary to be done in and about the premises as fully to all intents andpurposes as he might or could do if personally present at the doing thereof, hereby ratifying andconfirming all that said attorney may or shall lawfully do or cause to be done by virtue hereof.     INWITNESS WHEREOF, the undersigned has hereunto set his hand this9th day of March, 2007.       /s/ Robert R. Buck (sign name)         Robert R. Buck         (print name)  
 

 
POWER OF ATTORNEYWHEREAS, Kendle International Inc., an Ohio corporation (the “Company”), proposes to file with theSecurities and Exchange Commission under the provisions of the Securities Exchange Act of 1934, asamended, and the Rules and Regulations thereunder, an Annual Report on Form 10-K for the year endedDecember 31, 2006; and     WHEREAS, the undersigned is a director of the Company;     NOW, THEREFORE, the undersigned hereby constitutes and appoints Karl Brenkert III and JarrodB. Pontius, acting individually, his attorney, for him and in his name, place and stead, and insuch appointee’s office and capacity in the Company, to execute and file such Annual Report on Form10-K, and thereafter to execute and file any amendments or supplements thereto, hereby giving andgranting to said attorney full power and authority to do and perform each and every act and thingwhatsoever requisite and necessary to be done in and about the premises as fully to all intents andpurposes as he might or could do if personally present at the doing thereof, hereby ratifying andconfirming 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 th day of March,2007.        (sign name)         G. Steven Geis         (print name)  
 

 
POWER OF ATTORNEYWHEREAS, Kendle International Inc., an Ohio corporation (the “Company”), proposes to file with theSecurities and Exchange Commission under the provisions of the Securities Exchange Act of 1934, asamended, and the Rules and Regulations thereunder, an Annual Report on Form 10-K for the year endedDecember 31, 2006; and     WHEREAS, the undersigned is a director of the Company;     NOW, THEREFORE, the undersigned hereby constitutes and appoints Karl Brenkert III and JarrodB. Pontius, acting individually, his attorney, for him and in his name, place and stead, and insuch appointee’s office and capacity in the Company, to execute and file such Annual Report on Form10-K, and thereafter to execute and file any amendments or supplements thereto, hereby giving andgranting to said attorney full power and authority to do and perform each and every act and thingwhatsoever requisite and necessary to be done in and about the premises as fully to all intents andpurposes as he might or could do if personally present at the doing thereof, hereby ratifying andconfirming 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 ofMarch, 2007.            /s/ Timothy E. Johnson (sign name)         Timothy E. Johnson         (print name)  
 

 
POWER OF ATTORNEYWHEREAS, Kendle International Inc., an Ohio corporation (the “Company”), proposes to file with theSecurities and Exchange Commission under the provisions of the Securities Exchange Act of 1934, asamended, and the Rules and Regulations thereunder, an Annual Report on Form 10-K for the year endedDecember 31, 2006; and     WHEREAS, the undersigned is a director of the Company;     NOW, THEREFORE, the undersigned hereby constitutes and appoints Karl Brenkert III and JarrodB. Pontius, acting individually, his attorney, for him and in his name, place and stead, and insuch appointee’s office and capacity in the Company, to execute and file such Annual Report on Form10-K, and thereafter to execute and file any amendments or supplements thereto, hereby giving andgranting to said attorney full power and authority to do and perform each and every act and thingwhatsoever requisite and necessary to be done in and about the premises as fully to all intents andpurposes as he might or could do if personally present at the doing thereof, hereby ratifying andconfirming all that said attorney may or shall lawfully do or cause to be done by virtue hereof.     INWITNESS WHEREOF, the undersigned has hereunto set his hand this9th day ofMarch, 2007.       /s/ Donald C. Harrison (sign name)         Donald C. Harrison         (print name)  
 

 
POWER OF ATTORNEYWHEREAS, Kendle International Inc., an Ohio corporation (the “Company”), proposes to file with theSecurities and Exchange Commission under the provisions of the Securities Exchange Act of 1934, asamended, and the Rules and Regulations thereunder, an Annual Report on Form 10-K for the year endedDecember 31, 2006; and     WHEREAS, the undersigned is a director of the Company;     NOW, THEREFORE, the undersigned hereby constitutes and appoints Karl Brenkert III and JarrodB. Pontius, acting individually, his attorney, for him and in his name, place and stead, and insuch appointee’s office and capacity in the Company, to execute and file such Annual Report on Form10-K, and thereafter to execute and file any amendments or supplements thereto, hereby giving andgranting to said attorney full power and authority to do and perform each and every act and thingwhatsoever requisite and necessary to be done in and about the premises as fully to all intents andpurposes as he might or could do if personally present at the doing thereof, hereby ratifying andconfirming 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 ofMarch, 2007.       /s/ Frederick A. Russ (sign name)         Frederick A. Russ         (print name)  
 

 
POWER OF ATTORNEYWHEREAS, Kendle International Inc., an Ohio corporation (the “Company”), proposes to file with theSecurities and Exchange Commission under the provisions of the Securities Exchange Act of 1934, asamended, and the Rules and Regulations thereunder, an Annual Report on Form 10-K for the year endedDecember 31, 2006; and     WHEREAS, the undersigned is a director of the Company;     NOW, THEREFORE, the undersigned hereby constitutes and appoints Karl Brenkert III and JarrodB. Pontius, acting individually, his attorney, for him and in his name, place and stead, and insuch appointee’s office and capacity in the Company, to execute and file such Annual Report on Form10-K, and thereafter to execute and file any amendments or supplements thereto, hereby giving andgranting to said attorney full power and authority to do and perform each and every act and thingwhatsoever requisite and necessary to be done in and about the premises as fully to all intents andpurposes as he might or could do if personally present at the doing thereof, hereby ratifying andconfirming all that said attorney may or shall lawfully do or cause to be done by virtue hereof.     INWITNESS WHEREOF, the undersigned has hereunto set his hand this14th day ofMarch, 2007.       /s/ Robert C. Simpson (sign name)         Robert C. Simpson         (print name)