Caverta 100 acts by inhibiting PDE-5 and enhancing NO action within the member. The mechanism of erection of the member involves unharness of gas (NO) throughout sexual stimulation. NO then activates the accelerator guanylate cyclase, which ends up in exaggerated levels of cyclic deoxyguanosine monophosphate (cGMP), leading to swish muscle relaxation and influx of blood to the member. male erectile dysfunction (ED) is inability of men to realize Associate in Nursing maintain an erect member with spare rigidity to permit sexual activity. This drugs works by serving to relax the blood vessels in member, permitting blood to flow into member once you get sexually excited.