For treatment of erectile dysfunction: For oral dosage form disintegrating tablets : Adults—10 milligrams mg as a single dose, no more than once per day, approximately 1 hour before sexual activity. If you use too much, the chance of having unwanted effects is increased. Do not open the blister pack until you are ready to take the tablet. A prolonged erection priapism can damage the penis. However, the dose is usually not more than 20 mg once per day. Common side effects may include: flushing sudden warmth, redness, or tingly feeling ; stuffy nose, sinus pain; upset stomach; or back pain. · Adults up to 65 years—10 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. . 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. .