Fildena primarily has Sildenafil citrate that comes under the classification of PDE5 inhibitor. PDE5 degenerates cGMP. Due to the breakdown of cGMP, there is a lack of smooth muscle vasodilation. Less amount of cGMP declines blood flow to blood vessels of penile. Scanty of blood leads to no erection. With the use of Fildena, cGMP level raises and henceforth vasodilation happens and so blood reaches to penile region and finally it brings out erection.
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