vTadalafil, the active ingredient in Vidalista 40 mg, is a PDE5 inhibitor (phosphodiesterase type 5 inhibitor). PDE5 is an enzyme that breaks down cGMP (cyclic guanosine monophosphate), a molecule that helps relax smooth muscles in the penis and promotes increased blood flow. By blocking PDE5, Tadalafil helps maintain higher levels of cGMP, improving blood flow to the penis and making it easier to achieve and maintain an erection during sexual activity.
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