Zenegra 50 mg is a prescription medicine that contains 50 mg of sildenafil citrate, the same active ingredient found in Viagra. It is marketed by Alkem Laboratories and is primarily used to treat erectile dysfunction (ED) in adult men. Sildenafil belongs to a class of medicines called PDE-5 inhibitors, which increase blood flow to the penis during sexual stimulation, helping achieve and maintain an erection. https://www.genericday.com/zenegra-50-mg.html