The active medication component of Fildena xxx Tablet, sildenafil citrate, is a phosphodiesterase type 5 inhibitor. Erectile dysfunction and other male sexual issues are commonly treated with phosphodiesterase type 5 inhibitors.

Men need a healthy arterial blood flow and a decrease in venous outflow to get a solid erection. Sildenafil citrate functions by preventing the smooth muscle cells lining the blood artery supplying the primary erectile tissue of the penis from degrading cyclic guanosine monophosphate (cGMP). It results in a relaxation of the penile muscles and an increase in blood flow to that area.