title: Are butyrophenones effective for the treatment of primary headache in the emergency department?
abstract: OBJECTIVE
  Butyrophenones have been reported to provide effective migraine relief in the emergency department (ED). We conducted a systematic review of the evidence for their use in the ED.
  
  
  METHODS
  We searched the Cochrane, Medline, Embase, and CINAHL databases.
  
  
  METHODS
  Included studies were randomized trials of a parenteral butyrophenone (droperidol, haloperidol) versus placebo or a comparator in migraine or benign headache with results available in English. Study quality was determined using the Jadad score. Six articles were included.
  
  
  METHODS
  Primary outcomes were subjective or objective headache relief (>50% improvement in visual analogue scale scores). Secondary outcomes included side effects. We reported pooled odds ratios (ORs) with their 95% confidence intervals (CIs) for subjective or objective headache relief for butyrophenones versus placebo or comparator agents.
  
  
  RESULTS
  Three studies reported subjective headache relief with a butyrophenone versus placebo or meperidine in migraine. Two studies reported objective headache relief with droperidol versus prochlorperazine, whereas one study compared droperidol versus olanzapine in benign headache. The pooled OR for subjective headache relief was 8.08 (95% CI 1.54-42.30) for a butyrophenone versus placebo, whereas it was 1.50 (95% CI 0.33-6.77) for droperidol versus meperidine in migraine. The pooled OR for objective headache relief was 2.96 (95% CI 1.36-6.43) for droperidol versus prochlorperazine in benign headache. Rates of side effects were 10 to 45%; akathesia and sedation were the most common.
  
  
  CONCLUSIONS
  Butyrophenones are effective for the relief of migraine or benign headache. However, adverse effects make it difficult to recommend butyrophenones above agents with similar effectiveness and fewer problems.
authors: Emergency Department, Tan Tock Seng Hospital, Singapore. Beng_Leong_Lim@ttsh.com.sg
authors: Lim Beng
authors: LB
authors: Leong
authors: Anne-Maree
authors: AM
authors: Kelly
mesh_terms: D002090:Butyrophenones / Q000008:administration & dosage / Q000627:therapeutic use*; D004329:Droperidol / Q000627:therapeutic use; D004636:Emergency Service, Hospital; D006220:Haloperidol / Q000627:therapeutic use; D006261:Headache / Q000188:drug therapy*; D006801:Humans; D008881:Migraine Disorders / Q000188:drug therapy*; D016032:Randomized Controlled Trials as Topic; D016896:Treatment Outcome
chemical_list: D002090:Butyrophenones; D006220:Haloperidol; D004329:Droperidol