This development was credited largely “due to the introduction of generic products. Food and Drug Administration has approved fifteen drug manufacturers to market generic sildenafil in the United States. What should I do if I forget a dose? Rarely reported side effects include: an erection that will not go away priapism. New Zealand Sildenafil was reclassified in New Zealand in so it could be bought over the counter from a pharmacist. Shake the liquid well for 10 seconds before each use to mix the medication evenly. Viagra is also informally known as “vitamin V”, “the blue pill”, or “blue diamond”, as well as various other nicknames.Sildenafil (Viagra, Revatio) is a moderately priced drug used to treat erection problems in test1.ru 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 .  · You can take the drug 30 minutes to 4 hours before you anticipate sexual activity. Based on how well you respond to this dosage and any side effects you have, your doctor may either increase your. About sildenafil (Viagra) Sildenafil is a medicine used to treat erection problems (erectile dysfunction). Sildenafil is also sometimes used to treat pulmonary hypertension (high blood pressure in the blood vessels that supply the lungs). If you have erection problems sildenafil works by temporarily increasing blood flow to your penis when.