Tadalafil in Vidalista 20 mg works by inhibiting the phosphodiesterase type 5 (PDE5) enzyme, which regulates blood flow in the penis. When PDE5 is blocked, levels of cyclic GMP (cGMP) increase, relaxing smooth muscle tissue and allowing more blood to flow into the erectile tissue during arousal. This supports a natural erection in response to sexual stimulation.
https://www.genericday.com/vidalista-20-mg.html