Cenforce 150 is sildenafil citrate. It belongs to the class of medicines known as PDE-5 inhibitors that increase the blood flow to the penis following sexual stimulation. It does this by blocking the enzyme responsible for the breakdown of cGMP. This is a substance that relaxes and widens blood vessels and smooth muscle cells, allowing men to keep an erection hard enough for sex. Sildenafil is now one of the standard treatments for erectile dysfunction.

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