Malegra 200 is a drug prescribed to men to treat erectile dysfunction (ED). The active component of it is sildenafil citrate, an inhibitor of phosphodiesterase type 5 (PDE5). Malegra is an extremely potent form of the drug that usually contains sildenafil citrate. Malegra functions similarly to other drugs that contain sildenafil citrate, like Viagra, in that it increases blood flow to the penis during sexual stimulation. By relaxing the blood vessels in the penis and enabling the increased blood flow required for an erection, this aids men in achieving and maintaining an erection.