Vidalista 10, which contains tadalafil as its active ingredient, improves circulation to the penis during sexual activity by inhibiting the enzyme phosphodiesterase type 5 (PDE5). Here's how it works: PDE5 Inhibition: PDE5 is an enzyme that breaks down cyclic guanosine monophosphate (cGMP), a molecule that helps relax the smooth muscles in blood vessels. When PDE5 is inhibited, cGMP levels increase. Relaxation of Smooth Muscles: Increased cGMP causes the smooth muscles in the walls of blood vessels, particularly those in the penis, to relax. This relaxation allows the blood vessels to widen (vasodilation). Improved Blood Flow: Vidalista 10 widening of blood vessels allows more blood to flow into the penis, helping to achieve and maintain an erection when sexually aroused. Enhanced Erection: By improving blood flow, Vidalista 10 supports the natural erectile process, helping men with erectile dysfunction (ED) to achieve a firm and lasting erection during sexual activity. It’s important to note that Vidalista 10 requires sexual stimulation to be effective. It doesn't directly cause an erection without arousal; it simply facilitates the process by improving blood flow.