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Impotence (Erectile Dysfunction) Erectile dysfunction is a frequent or continuous inability to achieve or maintain an erection. Mild erectile dysfunction occurs in men who occasionally achieve full erections but usually obtain erections that are not suitable for penetration or cannot be maintained for the full act of intercourse. Severe erectile dysfunction occurs in men who are rarely able to achieve an erection. Erectile dysfunction is more common in older men; however, it is not a normal part of the aging process. Causes of Erectile Dysfunction To achieve and maintain an erection, the penis requires an adequate inflow of blood and restricted outflow of blood. The inflow of blood to the penis can be reduced or restricted if the man has diabetes, atherosclerosis, or blood clots; or had a surgery involving the surrounding blood vessels. The outflow of blood back to the body can occur too quickly to maintain an erection if the man has abnormalities in the veins of his penis. Nerve damage caused by prostate surgery, multiple sclerosis, a stroke, spinal disease, diabetes, peripheral nerve damage, alcohol, or drugs can cause erectile dysfunction. Other causes include: low levels of testosterone; fatigue; stress; performance anxiety; depression, guilt; fear of intimacy; drugs such as antihypertensives, antidepressants, some sedatives, antipsychotics, lithium, Ritalin, digoxin, cimetidine, and ecstasy; or comfort level with a new sex partner. Symptoms Associated with Erectile Dysfunction Difficulty engaging in intercourse due to an inability in achieving or maintaining an erection that is sufficiently hard May or may not experience a low sex drive May stop having erections while sleeping or when waking up May be able to maintain hard erections some of the time, but may not be able to achieve or maintain erections at other times Herbal Treatments for Impotence Korean Red Ginseng Scientific Evidence from Clinical Trials In a controlled, double-blind, crossover study, 45 men were given either placebo or 900 mg of Korean red ginseng three times per day for 8 weeks. After a seven day period in which neither group received treatment, the groups were switched and the study was repeated. The results from the trials showed that sexual function improved significantly while taking 900 mg of Korean red ginseng three times per day (Hong et al. 2002). Ginkgo (Ginkgo biloba) Scientific Evidence from Clinical Trials A study involved 60 patients with proven arterial erectile dysfunction (inadequate arterial inflow of blood) that had not responded to papaverine injections. They were given 60 mg of ginkgo extract per day for 12 to 18 months. Improvements in blood flow were measured using duplex sonography after 6 to 8 weeks. Half on the men gained potency within 6 months. Of the 30 who had not gained potency from the ginkgo alone, 12 were successfully treated with a new trial of papaverine injections (Sikora et al. 1989). References Hong, B., Y. Ji, J. Hong, et al. 2002. "A double-blind crossover study evaluating the efficacy of Korean red ginseng in patients with erectile dysfunction: a preliminary report." Journal of Urology. 168:2070-2073. Sikora, R., M. Sohn, et al. 1989. "Ginkgo biloba extract in the therapy of erectile dysfunction." Journal of Urology. 141: Abstract 73. |
An outline of clinical studies that verify the effectiveness of herbal medications and supplements |