Penegra 50 mg contains sildenafil citrate, the same active ingredient found in Viagra. It is used to treat erectile dysfunction (ED) in men by increasing blood flow to the penis, helping men achieve and maintain an erection when sexually aroused. Sildenafil works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which usually restricts blood flow to the penis. By blocking this enzyme, Penegra helps relax the blood vessels in the penis, allowing more blood to flow in, which facilitates an erection.
https://www.genericday.com/penegra-50-mg.html