Cenforce 100 mg is a drug that is formulated to treat erectile dysfunction in men. The main component of this pill is sildenafil citrate, a PDE5 inhibitor.  This compound increases the blood flow to the penis, allowing men to achieve and maintain an erection during sexual activity. In simple words, it helps men during sex to give or take pleasure by increasing blood circulation in the pelvic region. While this medicine also helps men with other deceases like arterial hypertension, which is high blood pressure in the tiny arteries that supply oxygen to the lungs. While one pill can last up to 3 or 4 hours, it will not work unless you are sexually stimulated.