Vardenafil is in a class of medications called phosphodiesterase PDE inhibitors. The amount of medicine that you take depends on the strength of the medicine. If you are taking the rapidly disintegrating tablets, your doctor will not be able to adjust your dose because the rapidly disintegrating tablets are only available in one strength. Women should not take vardenafil, especially if they are or could become pregnant or are breast-feeding. Dosing The dose of this medicine will be different for different patients.In combination with sexual stimulation, vardenafil works by increasing blood flow to the penis to help a man get and keep an drug does not protect against . Brand names Why is this medication prescribed? Vardenafil is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Vardenafil is in a .  · Vardenafil is used to treat men with erectile dysfunction (sexual impotence). It belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These .