Viagra. 50 mg orally 1 hour before sexual activity. may be increased to mg or reduced to 25 mg, depending on effectiveness and tolerance. not to exceed mg/day. .Alpha-blockers are sometimes prescribed for prostate problems or high blood pressure. Whereas others will want to take full advantage of the savings provided by the generic. The information provided is for educational purposes only and is not intended to replace discussions with a healthcare provider. Some people may also have ringing in their ears tinnitus or dizziness. When that happens, this version is known as the generic. If you have an erection that lasts more than 4 hours, get medical help right away. Stop taking VIAGRA and call your healthcare provider right away if you have any sudden vision loss sudden hearing decrease or hearing loss.Sildenafil (Viagra) is a phosphodiesterase-5 (PDE-5) inhibitor. PDE-5 is a protein in your body that breaks down the molecules that normally cause an erection. . Viagra. 50 mg orally 1 hour before sexual activity. may be increased to mg or reduced to 25 mg, depending on effectiveness and tolerance. not to exceed mg/day. . CHOOSE BRAND-NAME VIAGRA. The original little blue pill prescribed by doctors for over 20 years. Clinically proven to treat men with erectile dysfunction (ED) Ongoing .Pharmaceutical companies can also put a significant amount of investment into the marketing of a brand-name medication. You are encouraged to report adverse events related to Viatris products by calling U. For the treatment of ED , both Sildenafil and Viagra are produced in 25mg, 50mg and mg pills. Stop taking VIAGRA and call your healthcare provider right away if you have any sudden vision loss sudden hearing decrease or hearing loss. Benefits of Viagra vs Sildenafil Viagra and Sildenafil contain the same active ingredients and work in the same way.