Malegra 100 is used for impotence in men. It is a great medicine that can easily get a very good and strong erection with just one dose. This medicine contains sildenafil citrate as an active ingredient. It helps in prolonged sexual activity with stronger erection by increasing the blood flow in the blood vessels in the penis of men. This medicine is usually recommended on an empty stomach. Also, this medicine usually gives effective results for 4-6 hours. It is very important to have a doctor's prescription before taking this medicine. Then you can buy this medicine online very easily. But this medicine is not for children and women but only for men aged 18 and above.