[Treatment of refractory medication overuse headache].

Medication overuse headache (MOH) is refractory headache with continuous and large amount use of drugs (analgesics, non-steroidal anti-inflammatory drugs, and triptans etc.) For treatment of MOH, overused drugs must be stopped as soon as possible. And preventive medication should be started at the same time. Also, the history of the patient's headache and social condition must be clarified. In some cases, replacement therapy with another medication must be considered. But, even in recent years, scientific research in high-evidence level cannot be achieved. We should make more clear animal models of MOH and the investigations with more basic study must be scheduled.