An inherited eye disease that affects the retina. This helps blood flow into your penis more easily, and helps you get firmer erections that last for longer. 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. The four main medicines taken by mouth for erectile dysfunction are: Avanafil Stendra. These are commonly prescribed for an enlarged prostate or male pattern baldness.Viagra has even been tried as a treatment for sexual dysfunction in women. However, the U.S. Food and Drug Administration (FDA) hasn’t approved this use of Viagra. Indeed, for . Free express shipping. Your treatment delivered in secure packaging, in business days. Aftercare. We’ll check in with you regularly to see how your treatment is going. View all . Generic Viagra (sildenafil) is available as a , , , and milligram (mg) pill and in liquid form. It’s meant to be taken as needed — about an hour before sex — but .