Malegra 100 is a drug used to treat erectile dysfunction in men. By using this medicine about 30 to 40 minutes before sex, you can enjoy a longer erection with your partner. This medicine should be taken only once in 24 hours. The tadalafil in this drug enhances sexual arousal by improving blood flow to the arteries of the penis. The drug should be taken only once a day otherwise it may cause side effects. This medicine is 100% safe and effective.