Cenforce 150mg works by stopping phosphodiesterase type 5 (PDE5), an enzyme that causes the penis to lose its firmness. It also prevents the arteries that transfer blood to the penis from blocking.Sildenafil citrate is the active ingredient in Cenforce 120mg which stops PDE5 from doing its work. This prevents the penis from losing its firmness and allows men to get erections.It also widens the blood vessels, which makes it easier for blood to flow to the penis. This can help men get erections and maintain them for longer periods.It is not advisable to take it with alcohol or other substances, as they may interfere with its effectiveness. It is best to take it on an empty stomach, as it will be more effective.