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Extracted from text ... VIVIAN FRITZ, MB MCh, FCP (SA), PhD, FRCP, FCNeurol (SA) Professor Emeritus, University of the Witwatersrand, Johannesburg In the 1988 International Headache Society (IHS) classification drug-induced headache is defined as: ? headache appearing at least 15 days a month ? headache induced by the regular intake of analgesics, ergot alkaloids ? headache disappearing after withdrawal of substance. The term drug-induced headache has now been changed to medication-overuse headache in the new IHS classification. In the new classification it is required that the headache should worsen or increase in frequency during symptomatic medication overuse. Chronic headaches with medication overuse occurs ..
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