Do not keep outdated medicine or medicine no longer needed. Do not use more of it and do not use it more often than your doctor ordered. Allow 24 hours to pass between doses. What special dietary instructions should I follow? Do not push the tablet through the foil. If your dose is different, do not change it unless your doctor tells you to do so.Vardenafil is used in adult men to treat erectile dysfunction (impotence). Vardenafil may also be used for purposes not listed in this medication guide.  · 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. Your doctor may adjust your dose if needed. However, the dose is usually not more than 20 mg once per day.  · Vardenafil is used to treat men with erectile dysfunction (sexual impotence). It belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly.