Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Your doctor or other health care professional can recommend one for you based on these factors, other health conditions you have and any other medicines you take. Follow the package directions to remove the tablet from the blister package. Adults up to 65 years—10 mg as a single dose, no more than once per day, approximately 1 hour before sexual activity. Do not break, crush, or chew it. An inherited eye disease that affects the retina.Generic name: Vardenafil Tablets [ var-DEN-a-fil ] Brand name: Levitra Drug class: Impotence agents Medically reviewed by Last updated on Sep . Vardenafil Tablets. Vardenafil is a medication that treats erectile dysfunction. ED is the inability to achieve and sustain an erection suitable for sexual intercourse. This . · Descriptions. Vardenafil is used to treat men with erectile dysfunction (sexual impotence). It belongs to a group of medicines called phosphodiesterase 5 (PDE5) .