Patients are advised not to exceed a maximum dosing frequency of once daily. Before starting, stopping, or changing any medications while taking sildenafil, please get the advice of your doctor or pharmacist. What should I do if I forget a dose? This is important for your overall health and safety, as certain medications can negatively interact with each other or cause existing conditions to worsen. Its use is not studied in patients with severe hepatic impairment. Make sure to get an estimate of when you can expect your prescription in the mail. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand.Sildenafil (Viagra, Revatio) is a moderately priced drug used to treat erection problems in men. It is also used to treat pulmonary arterial hypertension, a serious heart and lung test1.ru drug is more popular than comparable drugs. It is available in generic and brand versions. Generic sildenafil is covered by most Medicare and insurance plans, but . VigRx Plus – Buy 3 Get 2 Free! Adult 60 Count (Pack of 5) out of 5 stars 2. $ $ 85 ($/Count) FREE delivery Fri, Nov Shop products from small business . VIAGRA can cause your blood pressure to drop suddenly to an unsafe level if taken with certain other medicines. Do not take VIAGRA if you take any other medicines called “nitrates.” Nitrates are used to treat chest pain (angina). A sudden drop in blood pressure can cause you to feel dizzy, faint, or have a heart attack or stroke.