Do not take vardenafil more than once a day. Remove an orally disintegrating Staxyn tablet from the package only when you are ready to use the medicine. The frequent vardenafil-specific side-effect is nausea ; the infrequent side effects are abdominal pain, back pain, photosensitivity , abnormal vision, eye pain, facial edema , hypotension , palpitation, tachycardia , arthralgia , myalgia , rash, itch, and priapism. The difference between the vardenafil molecule and sildenafil citrate is a nitrogen atom’s position and the change of sildenafil’s piperazine ring methyl group to an ethyl group. An erection will not occur just by taking a pill.milligrams 5 milligrams 10 milligrams 20 milligrams The best dose depends on your: age health medications Dosages Levitra is available as an oral tablet . Vardenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, vardenafil w. Hearing loss or ringing in ears. Heart attack—pain or tightness in the chest, shoulders, arms, or jaw, nausea, shortness of breath, cold or clammy skin, feeling faint or lightheaded. .