Zenegra 50 mg contains the active ingredient Sildenafil, which is a medication used to treat erectile dysfunction (ED) in men. It belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors. Zenegra 50 mg works by increasing blood flow to the penis during sexual stimulation, which helps men achieve and maintain an erection. https://www.genericday.com/zenegra-50-mg.html