Zhewitra is a medication used to treat erectile dysfunction (ED) in men. It contains the active ingredient Vardenafil, which is also found in the brand-name medication Levitra. Vardenafil works by inhibiting the enzyme phosphodiesterase type 5 (PDE5). This inhibition increases levels of cyclic guanosine monophosphate (cGMP), which relaxes the smooth muscles and increases blood flow to the penis, helping to achieve and maintain an erection when sexually aroused.
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