If you are using the disintegrating tablet, make sure your hands are dry before you handle the tablet. Use the medicine exactly as directed. Women should not take vardenafil, especially if they are or could become pregnant or are breast-feeding. What special dietary instructions should I follow? For oral dosage form tablets : Adults 65 years and older—5 milligrams mg as a single dose, no more than once per day, approximately 1 hour before sexual activity. Vardenafil is in a class of medications called phosphodiesterase PDE inhibitors.Vardenafil is used in adult men to treat erectile dysfunction (impotence). Vardenafil may also be used for purposes not listed in this medication guide. Vardenafil is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Vardenafil is in a class of medications called phosphodiesterase (PDE) inhibitors. It works by increasing blood flow to the penis during sexual stimulation. This increased blood flow can cause an erection. Generic name: vardenafil [ var-DEN-a-fil ] Brand names: Levitra, Staxyn. Dosage forms: oral tablet (10 mg; mg; 20 mg; 5 mg), oral tablet, disintegrating (10 mg) Drug class: Impotence agents. Medically reviewed by on Written by Cerner Multum.