Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. They are PDE5 inhibitors that allow for increased blood flow to the penis, leading to more frequent and harder erections. If you have an erection that lasts for more than 4 hours, you should go to the nearest hospital emergency department. About sildenafil Viagra Sildenafil is a medicine used to treat erection problems erectile dysfunction. However, the dosage can range from 25— mg.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 . 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 . AdLearn the truth about men’s sex pills and how to achieve optimum results naturally. Male UltraCore is the #1 Rated premium sex pill for maximum enhancing test1.rury Leaders · Watch Video · Fully Equipped · Custom Formulation.