The active ingredient in Modula, Tadalafil, works by inhibiting the enzyme phosphodiesterase type 5 (PDE5). PDE5 is responsible for breaking down cyclic guanosine monophosphate (cGMP), a molecule that helps relax the smooth muscles and dilate blood vessels in the penis. By blocking PDE5, Modula helps to increase levels of cGMP, allowing blood vessels to relax and improve blood flow to the penis during sexual arousal, which leads to an erection.
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