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Cluster headache: review of the literature

2001, British Journal of Oral and Maxillofacial Surgery

Abstract

To review the efficacy of interventions used in the treatment of acute and chronic cluster headache. Searching MEDLINE (from 1966MEDLINE (from to 1998) ) and the Cochrane Controlled Trials Register (Issue 2, 1998) were searched using the MeSH term 'cluster headache' and textwords 'migranous neuralgia' and 'Horton's neuralgia'. The papers found were then searched for further references. Only papers in English which stated the diagnostic criteria were included in the review. No inclusion criteria relating to the study design were stated. The included studies were randomised controlled trials (RCTs), controlled clinical trials (CCTs), and randomised and non-randomised crossover trials. Studies that assessed interventions for either the treatment of acute attacks or prophylaxis of cluster headache were eligible for inclusion. The specific interventions included in the review were: pizotifen, 1 to 4 mg daily (1 study); prednisolone, 30 mg for acute attack, or 20 mg as prophylaxis (1 study); dihydroergotamine nasal spray, 1 mg (1 study); oxygen, 100%, 6 L/minute for 15 minutes (1 study); lithium 900 mg/day and verapamil 360 mg/day (1 study); sumatriptan, 6 mg and 100 mg (1 study); leuprolide, 3.75 mg (1 study); intranasal capsaicin (2 studies); sumatriptan, 100 mg 8-hourly for 7 days (1 study); melatonin, 10 mg/day for 14 days (1 study); lithium carbonate, 800 mg for 7 days (1 study). No exclusion criteria relating to the participants were explicitly stated in the review. The participants had episodic cluster headache (n=269), cluster headache (type unspecified; n=60) and chronic cluster headache (n=197). The primary outcome assessed was pain relief. The author did not state how the papers were selected for the review, or how many reviewers performed the selection. The author did not state that they assessed validity. How were the studies combined? The studies were discussed narratively according to the intervention. There was no attempt to combine the results of the different studies due to the number of different interventions examined.