The amount of medicine that you take depends on the strength of the medicine. Its effects might last longer if you have mild to moderate ED. Talk to your doctor about eating grapefruit and drinking grapefruit juice while taking this medicine. Different brands may not work the same way. Oral medicines for ED usually work well and cause few side effects. A phone or video consultation is sometimes required for legal purposes. · Adults 65 years of age and older—25 mg as a single dose no more than once a day, 1 hour before sexual intercourse. Alternatively, the medicine may be . Why is this medication prescribed? Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Generic sildenafil is covered by most Medicare and insurance plans, but some pharmacy coupons or cash prices may be lower. Get sildenafil for as low as $, which is 95% .
