Understanding how Filitra works can help set realistic expectations for its effectiveness. The active component, Vardenafil, works by blocking the enzyme phosphodiesterase type 5 (PDE5). This enzyme is responsible for breaking down cyclic guanosine monophosphate (cGMP), a molecule that relaxes the smooth muscles in the penis and allows blood vessels to dilate. When PDE5 is inhibited, cGMP levels remain elevated, promoting increased blood flow to the penis.
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