Penegra 50 mg is a medication used to treat erectile dysfunction (ED) in men. It contains Sildenafil Citrate as its active ingredient. Sildenafil Citrate is a phosphodiesterase type 5 (PDE5) inhibitor, which works by increasing blood flow to the penis during sexual stimulation, allowing men to achieve and maintain an erection. https://www.genericday.com/penegra-50-mg.html