Cenforce 100 contains sildenafil citrate in 100 mg per pill, making it a potent medication for Erectile Dysfunction (ED) and Impotence. This drug falls under the category of PDE-5 inhibitors, which work by enhancing blood flow to the penis post sexual arousal. By inhibiting the enzyme responsible for cGMP breakdown, sildenafil helps in relaxing blood vessels and smooth muscle cells, enabling men to achieve and maintain a firm erection suitable for sexual activity.