Forzest 20 mg is a prescription medicine used to treat erectile dysfunction (ED) in adult men. It contains tadalafil, a phosphodiesterase type 5 (PDE5) inhibitor that helps improve blood flow to the penis during sexual stimulation, making it easier to achieve and maintain an erection. The mechanism of action involves blocking the PDE5 enzyme, which normally breaks down cyclic guanosine monophosphate (cGMP). When PDE5 is inhibited, cGMP levels increase, leading to relaxation of smooth muscles in penile blood vessels. https://www.genericday.com/forzest-20-mg.html