Headache and hormone replacement therapy in the postmenopausal woman.

Headache and migraine are common symptoms of the menopause, often associated with irregular periods, hot flashes, and night sweats. Perimenopausal women should routinely be asked about headache and migraine, so that they can be offered appropriate advice. If attacks are infrequent, it may be sufficient to optimize acute treatment strategies. Lifestyle changes, alone or combined with a nonprescription treatment such as isoflavones, may be considered, although evidence of efficacy is limited. In women with migraine and more severe menopause symptoms, continuous hormone replacement therapy should be considered, using a nonoral route and the lowest dose effective in controlling symptoms. For women who have contraindications to estrogen therapy or do not wish to use it, compounds that inhibit serotonin reuptake, such as venlafaxine, fluoxetine, and paroxetine, have all shown efficacy for the control of hot flashes and prevention of migraine. Gabapentin is another nonhormonal option that has clinical trial evidence of effectiveness in treating hot flashes and reducing the frequency and severity of migraine attacks. Although clonidine is licensed in several countries for migraine prophylaxis and treatment of vasomotor symptoms, any benefit from treatment is often offset by adverse events. There is evidence that hysterectomy can increase the frequency of migraine and menopause symptoms, with added morbidity and risk of mortality. Therapy should regularly be evaluated to assess its ongoing need, as hormonal triggers are self-limiting and abate after menopause.