Zhewitra 20 mg is a medication used to treat erectile dysfunction (ED) in men. It contains vardenafil as its active ingredient, which is a phosphodiesterase type 5 (PDE5) inhibitor. Vardenafil works by inhibiting the action of the enzyme phosphodiesterase type 5, which is responsible for the degradation of cyclic guanosine monophosphate (cGMP) in the smooth muscle cells of the penis. During ****ual stimulation, nitric oxide is released in the erectile tissue of the penis, which activates the enzyme guanylate cyclase.
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