Zhewitra 20 mg contains Vardenafil, which works by inhibiting the PDE5 enzyme. Normally, PDE5 breaks down a molecule called cGMP that helps relax the blood vessels in the penis, allowing for increased blood flow. By inhibiting PDE5, Vardenafil helps maintain higher levels of cGMP, allowing blood to flow into the penis and facilitating an erection when sexually aroused.
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