• Espen Saxhaug Kristoffersen, Jørund Straand, Kjersti Grøtta Vetvik, Jūratė Šaltytė Benth, Michael Bjørn Russell, and Christofer Lundqvist.
• Department of General Practice, Institute of Health and Society, University of Oslo, Blindern, PO Box 1130, 0318, Oslo, Norway. e.s.kristoffersen@medisin.uio.no.
• J. Neurol. 2016 Feb 1; 263 (2): 344-353.

UnlabelledMedication-overuse headache (MOH) is a common health problem. Withdrawal of the overused medication is the treatment of choice. We investigated the long-term effectiveness of brief intervention (BI) for MOH patients in primary care. The BI for MOH in primary care study was a blinded, pragmatic, cluster-randomised controlled trial. 25,486 patients (age 18-50) from 50 general practitioners (GPs) were screened for MOH. GPs defined clusters and 23 GPs were randomised to receive BI training and 27 GPs to continue business as usual (BAU). The GPs assessed their MOH patients with the Severity of Dependence Scale, gave individual feedback about the risk of MOH and advice to reduce headache medication. Primary outcomes, assessed 6 months after the intervention, were reduction in headache and medication days/month. 42% were screening responders. 2.4% had self-reported MOH. A random selection of 104 patients with self-reported MOH were invited, 75 were randomised out of which 60 with a physician-defined MOH diagnosis were included. None were lost to follow-up. BI was significantly better than BAU regarding primary outcomes (p < 0.001-0.018). Headache and medication days were reduced by 5.9 (95% CI 1.1-10.8) and 6.2 (1.1-11.3) more days/month in BI than BAU group. Chronic headache resolved in 63 and 11% in the BI and the BAU group (p < 0.001). Headache-related disability was lower among those who detoxified. In conclusion, BI is an effective treatment in primary care with lasting effect 6 months after the intervention for MOH.Trial RegistrationClinicalTrials.gov identifier: NCT01314768.

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