Fildena 100 mg works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which is responsible for regulating blood flow in the penis. By inhibiting PDE5, Fildena 100 mg helps to increase blood flow to the penis during sexual stimulation, allowing for a firm erection. The effects of Fildena 100 mg typically begin within 30 minutes to 1 hour after ingestion when taken on an empty stomach.

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