Fildena 100 is a type 5 phosphodiesterase inhibitor that is specific for the GMP enzyme system and circulates in the bloodstream. This enzyme, which is found in the penile region of men, is responsible for the development of erectile dysfunction. Fildena 150 is a PDE5 enzyme inhibitor that is very selective. Higher doses will produce more successful penile erections in a shorter period of time.

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