Malegra 100 tablet is used to treat men with sexual problems. The medicine contains an ingredient called Sildenafil Citrate, which increases blood flow to the muscles and relaxes the blood vessels. This drug should only be used by men over the age of 18 on the advice of a doctor. The effect of this drug lasts for about 36 hours, so it should be used only once a day. This drug improves your sexual activity. Alcohol should not be taken while taking this medicine as it has side effects.