cenforce 100 mg tablets are used as blue pills for the treatment of ED. The active ingredient is Sildenafil Citrate. Which lasts for 4 to 6 hours. And if the effect of this medicine is more than that, seek the help of a doctor immediately. Take this medicine if you have ED problem. This is because the drug does not protect against other diseases. Take this medicine only once a day. Do not use this medicine daily.