Cenforce 50 is a drug used to treat erectile dysfunction or impotence in men. This drug is a drug that is made up of a series of PDE5 inhibitors. This drug is the active pharmaceutical agent sildenafil citrate. This drug must be taken 30 to 60 minutes before intercourse. This drug shows its effect in 15 minutes after taking 20 but it varies from person to person. It is advisable to take this medicine only once a day.