Malegra 25 is a drug used to treat sexual problems in men such as erectile dysfunction or impotence. This drug contains a major ingredient called sildenafil. Take this medicine 1 hour before sexual activity. You can take one tablet with plain water within 24 hours as directed by your doctor. You can also take this medicine before or after a meal. Alcohol should not be consumed while taking this medicine, as it is more likely to have side effects if taken. It is imperative to take this medicine according to the doctor's advice.