Cenforce 120 is a medication containing Sildenafil citrate as its active ingredient. It is used to treat erectile dysfunction (ED) in men. Sildenafil is a phosphodiesterase type 5 (PDE5) inhibitor, and it works by increasing blood flow to the penis during sexual stimulation, facilitating the ability to achieve and maintain an erection. The effects of Sildenafil can last for about 4 to 6 hours. During this time, men may find it easier to achieve and maintain an erection in response to sexual stimulation.