Vidalista 80 is a medication primarily prescribed for the treatment of erectile dysfunction (ED) in men. It contains Tadalafil as its active ingredient, which is a phosphodiesterase type 5 (PDE5) inhibitor. The primary mechanism of action involves the inhibition of the PDE5 enzyme, which leads to increased levels of cyclic guanosine monophosphate (cGMP) in the penis. This results in relaxation of the smooth muscles in the blood vessels, allowing for improved blood flow to the penis during sexual stimulation.