When a man experiences sexual arousal, the release of nitric oxide triggers the production of cyclic guanosine monophosphate (cGMP) in the penis. This compound relaxes the smooth muscles of the blood vessels, allowing increased blood flow into the erectile tissues, resulting in an erection. However, an enzyme called
vidalista 60PDE5 breaks down cGMP, causing the blood vessels to constrict and the erection to subside.