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Conclusion Dramatic advances in the management of erectile dysfunction have occurred over the past decade. Most patients with the condition are now managed by primary care physicians and specialists other than urologists. A thorough clinical examination can help to differentiate from the numerous causes of erectile dysfunction. Oral therapy with a PDE-5 inhibitor (sildenafil, vardenafil or tadalafil) should be considered for first-line treatment of erectile dysfunction. Although PDE-5 inhibitors should not be given to patients taking nitrates, because of the risk of hypotension, in general they are well tolerated by the majority of patients. Those who do not respond to this first-line therapy should be referred to a urologist for further evaluation and consideration of alternative treatments. A phase 1 trial of one vaccine appeared to promote immune responses in 70 percent of the patients involved, according to a recent study. best price viagra viagra price A detailed medical history may reveal that the disorder is due to a chronic disease such as atherosclerosis, hypertension or diabetes mellitus. Inquiry about decreased libido and symptoms of hypothyroidism or hyperthyroidism may reveal a reversible cause (Table 1).5-7 Surgical intervention for a number of different conditions may remove anatomical structures necessary to erection, damage nerves, or impair blood supply. Complete removal of the prostate gland or external beam radiotherapy of the gland are common causes of impotence; both are treatments for prostate cancer. Some studies have shown that male circumcision may result in an increased risk of impotence,[13][14] while others have found no such effect,[15][16][17] and another found the opposite.[18] Low testosterone levels: Testosterone (the primary sex hormone in men) is not only necessary for sex drive (libido) but also is necessary to maintain nitric oxide levels in the penis. Therefore, men with hypogonadism (diminished function of the testes resulting in low testosterone production) can have low sex drive and erectile dysfunction.

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