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When a man is sexually aroused, blood flows into the penis longer than usual. From this the penis increases and becomes firmer. This persuade is called erectile dysfunction. After sexual intercourse, this superabundance blood plethora to the penis stops. An erection is lost.If an erection lasts notwithstanding a extended at the same time (more than 6 hours), this condition can incessantly damage your penis. You should consult a doctor this instant if you have in the offing an erection persists object of a great era of heyday (more than 4 hours).Some diseases and some medicines treatment interfere with the illegitimate erection. In these cases, insufficient blood go to the penis. The case, man cannot about a shapely erection. If this condition occurs many times and repetitiously, it’s called erectile dysfunction. viagra pill enables many men with erectile dysfunction to net a natural response to genital stimulation. When a gink is sexually intoxicated, Viagra helps to better blood surge to the penis, allowing it to be filled with blood sufficiently for the sake of an erection. After the completing of sex contact erection disappears. Sildenafil is a new oral drug in search the treatment of erectile dysfunction. It restores impaired erectile function and provides a normal answer to bodily stimulation. To reveal a favorable pharmacological outcome of cialis online requires voluptuous stimulation. Physiologic machine of erection of the penis involves launch of nitric oxide (N0) in the cavernous body during sexual stimulation. Nitric oxide activates which leads to increased levels of cyclic guano sine, which in turn causes weakening of unconstrained muscle of the corpus cavernous and increased blood squirt to the penis. Safe resort to of sildenafil in the following subgroups of patients has not been wilful, and, as a result, its exercise is contraindicated in them to again information: a difficult hepatic failure, hypotension (blood pressure 90/50 mm). levitra pills is not intended for capitalize on in women. Reproduction studies in rats and rabbits, oral management of sildenafil did not utilize teratogenic effects, had no effect on reproductive function and did not origin violations of peri / postnatal increment of the fetus and newborn. A take administer of Viagra orally at a quantity of 100 mg in healthy volunteers is not accompanied via changes in motility or sperm morphology. In studies in sturdy volunteers at distinct administer of the hypnotic in doses of 800 mg of adverse events were comparable to those when fetching Viagra at lessen doses, but were more common. In envelope of overdose should be symptomatic on gonfanon measures. Dialysis should not accelerate allowance of sildenafil, as the latter avidly binds to plasma proteins and is excreted in the urine. Preparations repayment for the treatment of erectile dysfunction should be worn with caution in patients with anatomical deformation of the penis (such as angulations, cavernous fibrosis or Peyronie’s disability) in people hardship from diseases that predispose (such as sickle chamber anemia, multiple myeloma, or leukemia).