Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Children 1 year of age and older weighing 45 kilograms kg or more—20 mg 3 times a day. Also tell your doctor if you or any of your family members have or have ever had an eye disease such as retinitis pigmentosa an inherited eye condition that causes loss of vision or if you have ever had sudden severe vision loss, especially if you were told that the vision loss was caused by a blockage of blood flow to the nerves that help you see. Be sure to let your doctor and pharmacist know that you are taking these medications before you start taking sildenafil. If too much is used, the chance of side effects is increased. However, if you take sildenafil with a high-fat meal, it will take longer for the medication to start to work.Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Sildenafil (Liqrev, Revatio) is used to improve the ability to exercise . AdRead Customer Reviews & Find Best Sellers. Free, Easy Returns On Millions Of Items. Know Everything You Need To Know About Health, Mind and Body With Our Books.1M+ visitors in the past month. · For oral dosage form (tablets): Adults up to 65 years of age—50 milligrams (mg) as a single dose no more than once a day, 1 hour before sexual intercourse. .
