How does Cenforce 200 work? And how should it be used? You can get all the information about it from our store Alladayplus. Cenforce 200, composed of the sildenafil citrate component, refers to a class of drugs known as phosphodiesterase inhibitors. Penis erection occurs in men. When the blood flow to the penis improves the blood vessels, and the amount of blood moved away from the penis goes down. Popular drugs (PDE5) work by inhibiting an enzyme called phosphodiesterase-5, which effectively inhibits cGMP. The drug helps prevent cGMP loss and allows cGMP to grow and continue; CGMP lasts longer; Longer penis erection. This drug is taken one hour before having sex The effect lasts for 4 to 6 hours.