Forzest 20 mg works by inhibiting the action of the PDE5 enzyme, which is responsible for breaking down cyclic guanosine monophosphate (cGMP) in the smooth muscle cells of the penis. By inhibiting PDE5, tadalafil helps to maintain higher levels of cGMP, which promotes relaxation of the smooth muscles and dilation of the blood vessels in the penis. This increased blood flow to the penis enhances erectile function, allowing for satisfactory sexual activity.

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