General：Sildenafil citrate is a selective 5-phosphodiesterase inhibitor that inhibits the decomposition of cyclic guanosine monophosphate and enhances nitric oxide-dependent, cyclic guanosine monophosphate-mediated pulmonary vasodilation. In addition to directly dilating pulmonary vasodilation, it can also prevent or reverse vascular remodeling.

Function：Sildenafil Citrate, a cyclic guanosine monophosphate (cGMP)-specific VI-type phosphodiesterase (PDE5) selective inhibitor, has good tolerability and high efficacy for erectile dysfunction.