We considered cost, medications available, and whether generic versions were offered to help reduce costs. When oral medications might not be safe Check with your health care team before you take any medicine for erectile dysfunction. An inherited eye disease that affects the retina. Efficacy Results in Subpopulations in Controlled Clinical Studies A review of population subgroups demonstrated efficacy regardless of baseline severity, etiology, race and age. It’s best to check your chosen provider’s site for more information. Sildenafil at steady state, at a dose not approved for the treatment of erectile dysfunction 80 mg t.AdEnjoy low prices and get fast, free delivery with Prime on millions of products. Discover new arrivals & latest discounts in male ed meds from your favorite brands.1M+ visitors in the past month.  · What is VIAGRA? VIAGRA is a prescription medicine used to treat erectile dysfunction (ED). You will not get an erection just by taking this medicine. VIAGRA helps a man with erectile dysfunction get and keep an erection only when he is sexually excited (stimulated). VIAGRA is not for use in women or children. Sildenafil (Viagra). This medicine works best when you take it on an empty stomach an hour before sex. The body takes longer to absorb it after a high-fat meal or alcohol. Its effects .