Vilitra 60 belongs to a class of medications known as phosphodiesterase type 5 (PDE5) inhibitors. PDE5 is an enzyme that degrades cGMP, thereby regulating its levels in the body. By inhibiting PDE5, Vilitra 60 prolongs the effects of cGMP, allowing for sustained smooth muscle relaxation and increased blood flow to the penis during sexual stimulation. This mechanism directly enhances the physiological response necessary for erectile function.