Buy Vilitra online and get an exclusive offer on credit cards. Vilitra is used to treat male erectile dysfunction and pulmonary arterial hypertension. Part of the physiological process of erection involves the release of nitric oxide in the corpus cavernosum. This then activates the enzyme guanylate cyclase which results in increased levels of cyclic guanosine monophosphate, leading to smooth muscle relaxation in the corpus cavernosum, resulting in increased inflow of blood and an erection. Vilitra is a potent and selective inhibitor of cGMP-specific phosphodiesterase type 5(PDE5) which is responsible for degradation of cGMP in the corpus cavernosum. This means that, with Vardenafil on board, normal sexual stimulation leads to increased levels of cGMP in the corpus cavernosum which leads to better erections. Without sexual stimulation and no activation of the NO/cGMP system, vardenafil should not cause an erection. Some side effects like Dyspepsia, vomiting, headache, flushing, dizziness, visual disturbances, color vision change, raised intra-ocular pressure, nasal congestion, hypersensitivity reactions, nausea, photosensitivity reactions, hypotension, hypertension, priapism, palpitations, myalgia, increased certainly kinase, a sudden decrease or loss of hearing, tinnitus.