Buy Avana 100 mg

se*ual stimulation that leads to an erection causes the production and release of nitric oxide in the pen*s. The nitric oxide causes an enzyme, guanylate cyclase, to produce cyclic guanosine monophosphate (cGMP). Buy Avana 100 mg is cGMP that is primarily responsible for increasing and decreasing the size of blood vessels carrying blood to and from the pen*s, respectively, and causing an erection.