Estrogens, progestins, and headache
Abstract
Migraine headaches appear to be linked to the menstrual cycle and the use of oral contraceptives (OCs). Migraine attacks occur during menses in 60% of women and appear to be related to the withdrawal of estrogen. The fluctuations in estrogen levels associated with migraine headaches produce biochemical changes in prostaglandin production, prolactin release, and opoid regulation. Treatment seeks to interrupt the pathophysiological sequence of menstrual-related migraine through the administration of nonsteroidal anti-inflammatory drugs, ergotamine, or, in refractory cases, hormonal agents. The frequency of migraine decreases with age, but tends either to regress or worsen during menopause. In some cases, estrogen replacement therapy for menopausal symptoms produces headache and it may be necessary to reduce the estrogen dose or change from conjugated estrogen to pure estradiol or estrone. The incidence and severity of migraines are also affected by OC use. OCs may trigger migraine episodes and exacerbate or alleviate pre-existing headache. This variable response seems to be a result of individual differences in intrinsic estrogen neuronal response. Although migraine itself may be a risk factor in stroke, there is no evidence that this risk is increased in migrainers who use OCs.
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