Sildenafil citrate is the active ingredient in Cenforce 100mg, and is also sold under the names Viagra and Revatio. Sildenafil citrate is a PDE5 inhibitor, which means it relaxes muscles and increases blood flow to specific areas of the body. In the case of Cenforce 100mg, that area is the penis, which can lead to improved erections. https://medzpills.com/product/cenforce-100-mg-sildenafil-citrate/