Zhewitra 20 mg contains vardenafil, a medication used to treat erectile dysfunction (ED) in men. Vardenafil is a phosphodiesterase type 5 (PDE5) inhibitor, which helps increase blood flow to the penis during sexual stimulation, making it easier to achieve and maintain an erection. Vardenafil in Zhewitra 20 mg inhibits the enzyme PDE5, which regulates blood flow in the penis. By blocking this enzyme, vardenafil enhances the effects of nitric oxide, which relaxes the blood vessels and allows for better blood flow to the penis during sexual stimulation. https://www.flatmeds.com/product/zhewitra-20-mg/