Zhewitra 20 mg is a medication used primarily for the treatment of erectile dysfunction (ED) in men. Its active ingredient is vardenafil, which is a phosphodiesterase type 5 (PDE5) inhibitor. Vardenafil works by relaxing the blood vessels in the penis, increasing blood flow in response to sexual stimulation. It inhibits the enzyme PDE5, which can prevent the accumulation of cyclic guanosine monophosphate (cGMP) that is necessary for achieving an erection.

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