Vardenafil ( INN ) is a PDE5 inhibitor used for treating impotence ( erectile dysfunction ) that is sold under the trade name Levitra ( Bayer AG ), ( GSK ), ( SP ) .

Vardenafil was co-marketed by Bayer Pharmaceuticals , GSK , and SP under the trade name Levitra . more

Vardenafil ( INN ) is a PDE5 inhibitor used for treating impotence ( erectile dysfunction ) that is sold under the trade name Levitra ( Bayer AG ), ( GSK ), ( SP ) .

Vardenafil was co-marketed by Bayer Pharmaceuticals , GSK , and SP under the trade name Levitra . As of 2005, the co-promotion rights of GSK on Levitra have been returned to Bayer in many markets outside the U.S. In Italy, Bayer sells vardenafil as Levitra and GSK sells it as Vivanza , thus, because of European Union trade rules, parallel imports might result in Vivanza sold next to Levitra in the E.U. less