Sildenafil citrate, the active ingredient in Fildena 150 mg, works by inhibiting the enzyme phosphodiesterase type 5 (PDE5). This inhibition increases blood flow to the penis during sexual stimulation, helping men achieve and maintain an erection. Limit alcohol consumption while taking Fildena 150 mg, as it can increase the risk of side effects such as dizziness and headache.

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