Zenegra 50 Mg is a generic version of Viagra, a medication used to treat erectile dysfunction (ED). Zenegra 50 Mg works by increasing blood flow to the penis, allowing men with ED to get and maintain an erection. It is taken orally, typically 30 minutes before sexual activity. The effects of Zenegra 50 Mg typically last for up to four hours. Zenegra 50 Mg is not intended to be used as a daily treatment for ED.