Many men are reluctant or ashamed to talk about erectile dysfunction ED with their doctor or may be unsure whether Viagra is the best option for them. D, kiremd farrinstitute. Percentage of Patients Reporting an Improvement in Erections. Your doctor will discuss the best treatment plan for you. Safety: Make certain that the Viagra samples you receive are safe and of excellent quality, as counterfeit drugs can be dangerous to your health. J Family Community Med.Sildenafil (Viagra, Revatio) is a moderately priced drug used to treat erection problems in is also used to treat pulmonary arterial hypertension, a serious heart and lung 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 . Viagra is an effective drug for treating male erectile dysfunction, but it targets sexual performance, not sexual arousal. There is limited evidence that Viagra may be . 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 in adults (Liqrev, Revatio) and children 1 year of age and older (Revatio) with pulmonary arterial hypertension (PAH; high blood pressure in the vessels carrying blood to the .