Cenforce 200 mg has to be sexually aroused in order to function, much like the other medications for sexual dysfunction. Once activated, sildenafil citrate works by preventing the PDE-5 medicine from doing its job. In contrast, it encourages the cGMP enzymes, which lead to the production of nitric oxide. Nitric oxide has the ability to relax the arteries and muscles around the penis, facilitating the easy flow of blood to the region. In order for the heart to carry out its only job of pumping blood, replacement blood vessels and lungs are also completed.