If you want to make your penis hard during intercourse then you should discuss with the doctor to know what medicine should be consumed to boost this desire and the name of the high quality medicine prescribed by the doctor is suhagra 100. The sildenafil citrate component of this medicine works to open the constricted blood vessels found in the body and relax the muscles around the penis. This ingredient is in other words a member of the group of PDE-5 inhibitors. All men should consume this medicine half an hour before sexual activity on an empty stomach or with a nutritious meal. The effect of this medicine is seen in the body for 4-6 hours.