Fildena 100 mg is a medication used to treat erectile dysfunction (ED) in men. It contains sildenafil citrate, the same active ingredient found in Viagra and other ED medications. Sildenafil citrate inhibits the enzyme phosphodiesterase type 5 (PDE5), leading to an increase in cyclic GMP. This causes the smooth muscles in the blood vessels of the penis to relax, allowing more blood to flow in and resulting in an erection when sexually aroused.

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