Zhewitra 40 mg works by inhibiting the action of phosphodiesterase type 5 (PDE5), an enzyme that breaks down cGMP (cyclic guanosine monophosphate) in the penis. cGMP is responsible for relaxing the blood vessels and increasing blood flow to the penis during sexual arousal. By blocking PDE5, Zhewitra helps maintain higher levels of cGMP, leading to improved erectile function.
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