Cenforce 150mg pills are used for the treatment of impotence (erectile dysfunction). They contain Sildenafil citrate, a drug that inhibits an enzyme called phosphodiesterase type 5 (PDE-5). This medication relaxes the blood vessels in the penis and allows blood to flow into them. It also increases the levels of a chemical called cyclic guanosine monophosphate, or cGMP. This enables the arteries in the penis to contract, causing a hard erection that lasts longer when sexually aroused. Impotence is a common sexual problem that affects 80% of men. It can be caused by a number of factors, including disease, drugs, and hormones. Buy Cenforce 120 mg is not suitable for use by women and should be avoided by men who are taking medicines called nitrates (often given for chest pain). It can also be dangerous if taken with other medicines that treat heart problems or liver problems, or if you have recently had a stroke or heart attack.