Malegra 100 is a very effective medicine used to treat erectile dysfunction in men. This drug contains Sildenafil Citrate, which circulates the blood to keep the penis strong and the muscles relaxed during intercourse. Taking this medicine 1 hour before intercourse can give your partner the pleasure of a strong erection. The effect of this drug usually lasts for 3-4 hours. This drug is for men only. This drug is only useful for men 18 and older and can be used in appropriate doses as per the doctor’s advice.