Zhewitra 20 mg is a medication used to treat erectile dysfunction (ED) in men. It contains vardenafil, which is a PDE5 inhibitor (phosphodiesterase type 5 inhibitor). Vardenafil works by increasing blood flow to the penis, helping men achieve and maintain an erection when sexually aroused. Vardenafil works by inhibiting the action of the PDE5 enzyme, which is responsible for breaking down cyclic GMP, a molecule that helps relax the muscles in the blood vessels of the penis. https://www.flatmeds.com/product/zhewitra-20-mg/