Suhagra 100 is a phosphodiesterase (PDE) inhibitor, prescribed for erectile dysfunction (impotence; inability to get or keep an erection) in men. It increases blood flow to the penis during sexual stimulation. The drug contains an ingredient called sildenafil which helps to increase blood flow to the penis tissues of a man. This drug eliminates the problem of impotence in men. Take this medicine 30 minutes before intercourse so that you can enjoy intercourse with your partner. You can also take this medicine before or after a meal. The effect of this medicine lasts for 4 to 6 hours. Take this medicine as advised by your doctor.