Vidalista 80 contains Tadalafil, a potent phosphodiesterase type 5 (PDE5) inhibitor. This medication works by enhancing blood flow to the penis, facilitating the ability to achieve and maintain an erection when sexually stimulated. Understanding its mechanism is essential to appreciating how it can counteract the physical symptoms of stress-related ED. When a man is aroused, the body releases nitric oxide, which increases the levels of cyclic guano sine monophosphate (camp).