title: Topiramate in migraine prevention: a double-blind, placebo-controlled study.
abstract: OBJECTIVE
  To evaluate the efficacy of topiramate in the preventative treatment of episodic migraine.
  
  
  BACKGROUND
  Topiramate is a broad-spectrum antiepileptic drug effective for treatment of multiple seizure types in adults and children. Antiepileptic agents have demonstrated efficacy in migraine prevention, and open-label experience from our clinic has suggested that topiramate might be effective for this use. We consequently conducted a single-center, double-blind, placebo-controlled trial to evaluate the efficacy and safety of topiramate for the preventative treatment of migraine.
  
  
  METHODS
  Forty patients, aged 19 to 62 years (mean, 38.2 years), were randomly assigned in a 1:1 ratio to receive topiramate (n = 19; all women) or placebo (n = 21; 20 women, 1 man). Following a prospective baseline phase of 4 weeks, the study drug dose was titrated weekly in 25-mg increments over 8 weeks to 200 mg per day or to the maximum tolerated dose. The titration phase was followed by an 8-week maintenance phase.
  
  
  RESULTS
  During the entire double-blind phase, topiramate-treated patients experienced a significantly lower 28-day migraine frequency (3.31 +/- 1.7 versus 3.83 +/- 2.1; P =.002) compared to placebo, irrespective of use of concomitant migraine prevention medications. The mean 28-day migraine frequency was reduced by 36% in patients receiving topiramate as compared with 14% in patients receiving placebo (P =.004). Twenty-six percent of the patients on topiramate and 9.5% of the patients on placebo achieved a 50% reduction in migraine frequency (P >.05). The mean dose of topiramate was 125 mg per day (range, 25 to 200 mg per day). Topiramate was well tolerated; 2 of 19 topiramate-treated patients discontinued treatment due to adverse events. Adverse effects that occurred more frequently in topiramate-treated patients included paresthesia, weight loss, altered taste, anorexia, and memory impairment.
  
  
  CONCLUSIONS
  Preventative therapy with topiramate significantly reduced migraine frequency. Larger multicenter clinical studies may further delineate the role of topiramate in migraine prevention.
authors.affiliation: Upstate Neurology Consultants, Albany, NY, USA.
authors.forename: J R
authors.initials: JR
authors.lastname: Storey
authors.forename: C S
authors.initials: CS
authors.lastname: Calder
authors.forename: D E
authors.initials: DE
authors.lastname: Hart
authors.forename: D L
authors.initials: DL
authors.lastname: Potter
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000700:Analgesics / Q000008:administration & dosage; D000855:Anorexia / Q000139:chemically induced; D000927:Anticonvulsants / Q000009:adverse effects / Q000494:pharmacology / Q000627:therapeutic use*; D001835:Body Weight / Q000187:drug effects; D004311:Double-Blind Method; D004338:Drug Combinations; D004408:Dysgeusia / Q000139:chemically induced; D005260:Female; D005632:Fructose / Q000009:adverse effects / Q000031:analogs & derivatives / Q000494:pharmacology / Q000627:therapeutic use*; D006801:Humans; D008297:Male; D008569:Memory Disorders / Q000139:chemically induced; D008875:Middle Aged; D008881:Migraine Disorders / Q000517:prevention & control*; D010292:Paresthesia / Q000139:chemically induced; D000077236:Topiramate; D016896:Treatment Outcome; D015431:Weight Loss / Q000187:drug effects
chemical_list: D000700:Analgesics; D000927:Anticonvulsants; D004338:Drug Combinations; D000077236:Topiramate; D005632:Fructose