Erection is a hemodynamic process, Levitra the basis of which Levitra is the relaxation of smooth muscles of cavernous bodies and located in its arterioles. During sexual stimulation of the nerve Levitra endings cavernous bodies released nitric oxide (N0), activating enzyme Levitra guanylate cyclase, which leads to higher content in the cavernous bodies Levitra cyclic guanosine monophosphate Levitra (cGMP). The result is Levitra relaxation of smooth muscles of cavernous bodies, that helps to increase blood flow to the penis. By blocking specific fosfodiesterazu fifth type (PDE5), participating in Levitra cleavage of cGMP, Vardenafil, thereby contributing Levitra Strengthening local action of endogenous nitric oxide (N0) in cavernous Levitra bodies during sexual stimulation. Levitra This effect causes the capacity Vardenafil enhance reaction to Levitra sexual stimulation. After oral Vardenafil is rapidly absorbed and begins to act after 15 minutes (the majority of men after 25 minutes), Levitra duration is 4-5 hours Levitra Levitra Levitra