Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, sildenafil works by increasing blood flow to the penis.However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. The body takes longer to absorb it after a high-fat meal or alcohol. Sildenafil Viagra. A newer form of the medicine that dissolves on the tongue might work faster than the pill that you swallow. Take sildenafil exactly as directed. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand.The Savings Offer and Program expire on 12/31/ For further information, call , visit , or write: Viatris Inc., P.O. Box , Mission, KS See risks & benefits. Learn more about what VIAGRA® (sildenafil citrate), a prescription treatment for ED. Drug Images What is Viagra? Viagra is a brand-name prescription drug that’s approved to treat erectile dysfunction (ED). With ED, you’re unable to have or maintain an erection. Viagra is. Sildenafil oral tablet is available as a brand-name drug and as a generic drug. Brand names: Viagra, Revatio. Sildenafil comes in three forms: an oral tablet, an oral suspension (liquid), and an.To provide you with the most relevant and helpful information, and understand which information is beneficial, we may combine your email and site usage information with other information we have about you. Shake the liquid well for 10 seconds before each use to mix the medication evenly. This boosts blood flow and helps you get an erection from sexual activity. This medicine is available only with your doctor’s prescription. Take sildenafil as needed before sexual activity. Sudden vision loss in one or both eyes can be a sign of a serious eye problem called non-arteritic anterior ischemic optic neuropathy NAION. You may opt-out of email communications at any time by clicking on the unsubscribe link in the e-mail.