Your doctor may need to change the doses of your medications or monitor you carefully for side effects. Follow your doctor’s orders or the directions on the label. After you remove the tablet from the blister package, immediately place it on your tongue and close your mouth. You may take this medicine with or without food. They include dutasteride Avodart, Jalyn and finasteride Propecia, Proscar. It is usually taken as needed, with or without food, 60 minutes before sexual activity.Vardenafil. These medicines are called PDE5 inhibitors. They enhance the effects of a chemical the body makes that relaxes muscles in the penis, called .  · Vardenafil is used to treat men with erectile dysfunction (sexual impotence). It belongs to a group of medicines called phosphodiesterase 5 (PDE5) . Vardenafil is used to treat men with erectile dysfunction (sexual impotence). It belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These .