Fildena 100 mg belongs to the PDE5 inhibitor group of medicine. Thus, used for treating the following health complications Erectile Dysfunction (ED) is a condition in which getting and maintaining an unsatisfactory erection seems difficult for a man. It is one of the most common sexual dysfunctions in men. It happens when the blood flows insufficiently through the erectile tissue, corpora cavernosa. Consequently, it leads to insufficient erection or ED.