Phosphodiesterase type-5 (PDE-5) inhibitors are medicines that are used to block the degradation of cGMP (Cyclic guanosine monophosphate) in smooth muscle cells that supply the central erectile tissues of the penis. These inhibitors provoke the relaxation of smooth muscles and sustain healthy penile function. Physicians usually prescribe PDE-5 inhibitors such as Levitra (Vardenafil), Viagra (Sildenafil […]
