Malegra is a widely used medication for the treatment of erectile dysfunction (ED) in men. It contains sildenafil citrate, the same active ingredient found in Viagra, and works by increasing blood flow to the penis to help achieve and maintain an erection during sexual activity. As a PDE5 inhibitor, Malegra works by blocking the enzyme that restricts blood flow in the penis. This allows the smooth muscles in the blood vessels to relax, improving circulation when a man is sexually aroused. Malegra typically begins working within 30 to 60 minutes and remains effective for up to 4 to 6 hours.