The active ingredient called sildenafil citrate is found in the cenforce tablet. Used to treat erectile dysfunction in men. The effect of this drug lasts for 4 to 6 hours. And if the effect of this medicine lasts for more than 4 hours, consult a doctor immediately. Consult a doctor before using this medicine. Seek medical advice before increasing or decreasing the dose of this medicine. Only take this medicine if you have ED problem.