One drug used to treat erectile dysfunction (ED) is called Cenforce 200. PDE5 inhibitor sildenafil is the active component of Cenforce. PDE5 inhibitors function during sexual stimulation by causing the muscles to relax and the blood flow to the penis to increase. It is recommended to take Cenforce tablets 30–60 minutes prior to engaging in sexual activity. A man's ability to stay in bed longer and achieve an erection may both benefit from this. An erection will typically last between four and six hours, but some people say it can continue longer. This time frame depends on the dosage and the rate at which it acts.