EXHIBIT 24 BIOVAIL CORPORATION INTERNATIONAL KNOW ALL MEN BY THESE PRESENTS, the undersigned hereby appoints Eugene N. Melnyk, Bruce D. Brydon and Kenneth C. Cancellara, or any of them, his true and lawful attorneys-in-fact and agents, with full power of substitution and restitution, for him and in his name, place and stead, in any and all capacities, to sign any Registration Statement on Form S-8 under the Securities Act of 1933, as amended, to sign any and all pre- or post-effective amendments to such Registration Statement, and to file the same with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their or his substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney on December 7, 1999. /s/ Eugene N. Melnyk ------------------------------------ Name: Eugene N. Melnyk Title: Chairman of the Board and Director EXHIBIT 24 BIOVAIL CORPORATION INTERNATIONAL KNOW ALL MEN BY THESE PRESENTS, the undersigned hereby appoints Eugene N. Melnyk, Bruce D. Brydon and Kenneth C. Cancellara, or any of them, his true and lawful attorneys-in-fact and agents, with full power of substitution and restitution, for him and in his name, place and stead, in any and all capacities, to sign any Registration Statement on Form S-8 under the Securities Act of 1933, as amended, to sign any and all pre- or post-effective amendments to such Registration Statement, and to file the same with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their or his substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney on December 7, 1999. /s/ Kenneth C. Cancellara ---------------------------------------- Name: Kenneth C. Cancellara Title: Senior Vice President, General Counsel, Secretary and Director EXHIBIT 24 BIOVAIL CORPORATION INTERNATIONAL KNOW ALL MEN BY THESE PRESENTS, the undersigned hereby appoints Eugene N. Melnyk, Bruce D. Brydon and Kenneth C. Cancellara, or any of them, his true and lawful attorneys-in-fact and agents, with full power of substitution and restitution, for him and in his name, place and stead, in any and all capacities, to sign any Registration Statement on Form S-8 under the Securities Act of 1933, as amended, to sign any and all pre- or post-effective amendments to such Registration Statement, and to file the same with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their or his substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney on December 7, 1999. /s/ Kenneth G. Howling ------------------------------------- Name: Kenneth G. Howling Title: Vice President, Chief Financial Officer EXHIBIT 24 BIOVAIL CORPORATION INTERNATIONAL KNOW ALL MEN BY THESE PRESENTS, the undersigned hereby appoints Eugene N. Melnyk, Bruce D. Brydon and Kenneth C. Cancellara, or any of them, his true and lawful attorneys-in-fact and agents, with full power of substitution and restitution, for him and in his name, place and stead, in any and all capacities, to sign any Registration Statement on Form S-8 under the Securities Act of 1933, as amended, to sign any and all pre- or post-effective amendments to such Registration Statement, and to file the same with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their or his substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney on December 7, 1999. /s/ Rolf K. Reininghaus --------------------------------------- Name: Rolf K. Reininghaus Title: Senior Vice President and Director EXHIBIT 24 BIOVAIL CORPORATION INTERNATIONAL KNOW ALL MEN BY THESE PRESENTS, the undersigned hereby appoints Eugene N. Melnyk, Bruce D. Brydon and Kenneth C. Cancellara, or any of them, his true and lawful attorneys-in-fact and agents, with full power of substitution and restitution, for him and in his name, place and stead, in any and all capacities, to sign any Registration Statement on Form S-8 under the Securities Act of 1933, as amended, to sign any and all pre- or post-effective amendments to such Registration Statement, and to file the same with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their or his substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney on December 7, 1999. /s/ Roger Rowan ------------------------------------ Name: Roger Rowan Title: Director EXHIBIT 24 BIOVAIL CORPORATION INTERNATIONAL KNOW ALL MEN BY THESE PRESENTS, the undersigned hereby appoints Eugene N. Melnyk, Bruce D. Brydon and Kenneth C. Cancellara, or any of them, his true and lawful attorneys-in-fact and agents, with full power of substitution and restitution, for him and in his name, place and stead, in any and all capacities, to sign any Registration Statement on Form S-8 under the Securities Act of 1933, as amended, to sign any and all pre- or post-effective amendments to such Registration Statement, and to file the same with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their or his substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney on December 7, 1999. /s/ Robert Vujea ------------------------------------- Name: Robert Vujea Title: Director EXHIBIT 24 BIOVAIL CORPORATION INTERNATIONAL KNOW ALL MEN BY THESE PRESENTS, the undersigned hereby appoints Eugene N. Melnyk, Bruce D. Brydon and Kenneth C. Cancellara, or any of them, his true and lawful attorneys-in-fact and agents, with full power of substitution and restitution, for him and in his name, place and stead, in any and all capacities, to sign any Registration Statement on Form S-8 under the Securities Act of 1933, as amended, to sign any and all pre- or post-effective amendments to such Registration Statement, and to file the same with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their or his substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney on December 7, 1999. /s/ Bruce D. Brydon ----------------------------------- Name: Bruce D. Brydon Title: Chief Executive Officer and Director EXHIBIT 24 BIOVAIL CORPORATION INTERNATIONAL KNOW ALL MEN BY THESE PRESENTS, the undersigned hereby appoints Eugene N. Melnyk, Bruce D. Brydon and Kenneth C. Cancellara, or any of them, his true and lawful attorneys-in-fact and agents, with full power of substitution and restitution, for him and in his name, place and stead, in any and all capacities, to sign any Registration Statement on Form S-8 under the Securities Act of 1933, as amended, to sign any and all pre- or post-effective amendments to such Registration Statement, and to file the same with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their or his substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney on December 7, 1999. /s/ Robert A. Podruzny ------------------------------------------- Name: Robert A. Podruzny Title: President, Chief Operating Officer and Director EXHIBIT 24 BIOVAIL CORPORATION INTERNATIONAL KNOW ALL MEN BY THESE PRESENTS, the undersigned hereby appoints Eugene N. Melnyk, Bruce D. Brydon and Kenneth C. Cancellara, or any of them, his true and lawful attorneys-in-fact and agents, with full power of substitution and restitution, for him and in his name, place and stead, in any and all capacities, to sign any Registration Statement on Form S-8 under the Securities Act of 1933, as amended, to sign any and all pre- or post-effective amendments to such Registration Statement, and to file the same with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their or his substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney on December 7, 1999. /s/ Wilfred G. Bristow ------------------------------------- Name: Wilfred G. Bristow Title: Director