Nitric oxide then activates the enzyme guanylate cyclase, which results in increased levels of cyclic guanosine monophosphate (cGMP), producing smooth muscle relaxation in the corpus cavernosum and allowing inflow of blood .Örne?in erkeklerde erken bo?alma kadar s?k?nt?lar görülmekte ise cialis eczanearac?l??? ile bu s?k?nt?lar sonland?r?labili