Cenforce 200 contains sildenafil citrate, a compound that belongs to a class of medications known as phosphodiesterase type 5 (PDE5) inhibitors. These drugs work by blocking the enzyme PDE5, which results in increased levels of cyclic GMP. This mechanism leads to relaxation of blood vessels and improved blood flow to the penis, facilitating an erection in response to sexual stimulation. The typical dosage of Cenforce 200 is 200 mg, taken approximately an hour before sexual activity, and it is generally well-tolerated with common side effects including headaches, flushing, and dyspepsia.