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Abstract
Non-estrogenic alternatives for the treatment of climacteric symptoms have their origin lost in history. Recent clinical trial data have shown that lifestyle and diet adjustment have some effect in improving both hot flushes and mood.
Over-the-counter phytotherapeutic extracts are very popular and women often try a variety of products before resorting to traditional medicine. Preparations containing isoflavones in variable doses, such as soy extract and red clover, or extracts from evening primrose, Cimifuga racemosa, ginseng and black cohosh are often used for treating the climacteric syndrome. The scientific support for their efficacy certainly does not equal their popularity.
The most tested pharmacological alternatives to estrogens are serotonin reuptake inhibitors (SSRIs). All available SSRIs have undergone trials for the relief of hot flushes. In spite of the difference between the compounds in both half-life and engagement of serotonin receptors, they appear to have very similar effectiveness in reducing hot flushes. At their best, SSRIs reduce hot flushes by 50–60%, compared with 80% for estrogen, and their effect appears only in the short term. SSRIs have mood-improving effects that appear to be independent of the effect on hot flushes. When used for the treatment of the climacteric syndrome, SSRIs do not adversely affect libido. Dependence is a major concern in women when offered this type of treatment, but does not appear to be a problem with this class of drugs. Withdrawal symptoms have never been reported in trials for hot flushes but are known to occur when SSRIs are used in the long term. In order to avoid these symptoms, the dose should be tapered slowly. Gabapentin, a drug used for the treatment of neuropathic pain and epilepsy, has shown that, in high doses, it has an efficacy similar to that of estrogen; however, this needs further confirmation.