Fildena Super Active is actively composed of a drug called Sildenafil Citrate, which is a PDE5 enzyme inhibitor. The action mechanism of Fildena Super Active is slightly complex. It stops the PDE5 enzyme and halts the degradation of cyclic Guanosine Monophosphate, which is a vasodilator. The body then produces nitric oxide that helps to enhance blood flow to the penile organ. cGMP and nitric oxide together work to dilate arteries, relax the muscles, and increases the blood flow to the penile organ, which results in an erection.