Filitra 20 mg blocks the PDE5 enzyme, which normally breaks down cyclic guanosine monophosphate (cGMP). When PDE5 is inhibited, cGMP levels increase, causing relaxation of smooth muscle in penile blood vessels. This allows more blood to flow into the pill during physical arousal, helping achieve and maintain a firm erection. Filitra 20 mg typically begins working within 30 to 60 minutes and lasts about 4 to 6 hours. It helps improve erection quality, firmness, and reliability during physical activity. However, it does not increase physical desire and requires physical stimulation to be effective.
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