title: Comparison of the effect of topiramate and sodium valporate in migraine prevention: a randomized blinded crossover study.
abstract: BACKGROUND
  Topiramate and sodium valporate are anticonvulsants, demonstrated to be effective as monotherapy for migraine prevention in placebo-controlled trials.
  
  
  OBJECTIVE
  To compare the relative efficacy of topiramate and sodium valporate in the prevention of migraine.
  
  
  METHODS
  A 24-week, randomized, double-blind, crossover, clinical trial was conducted from October 2003 to September 2004. A total of 64 patients with migraine headache, aged 14 to 57 years, were randomly allocated to the 2 treatment groups. The first group received topiramate (25 mg daily increment over 1 week to 50 mg) for a total of 2 months. The second group received sodium valporate (200 mg daily increment over 1 week to 400 mg) for 2 months. Response to treatment was assessed at 0, 1, 8, 16, and 24 weeks after start of therapy.
  
  
  RESULTS
  Topiramate appeared to be equivalent in efficacy and safety to sodium valporate. A significant decrease in duration, monthly frequency, and intensity of headache occurred in both groups. Of the 32 patients treated with sodium valporate, the mean standard deviation (SD) of monthly migraine frequency decreased from 5.4 (2.5) to 4.0 (2.8) episode per month, headache intensity from 7.7 (1.2) to 5.8 (1.7) by visual analog scale (VAS), and headache duration from 21.3 (14.6) to 12.3 (10.7) hours (P < .001). Correspondingly, in the 32 patients treated with topiramate, the mean SD of monthly headache frequency decreased from 5.4 (2.0) to 3.2 (1.9) per month, headache intensity from 6.9 (1.2) to 3.7 (1.3), and headache duration from 17.3 (8.4) to 3.9 (2.7) hours (P < .001).
  
  
  CONCLUSIONS
  This study demonstrates that treatment with topiramate and sodium valporate both significantly reduce migraine headache. This effect of topiramate and sodium valporate has previously been shown to reduce migraine headache, and we postulate that treatment with topiramate and sodium valporate may have a similar benefit.
authors.affiliation: Department of Neurology, Isfahan University of Medical Sciences and Health Services, Isfahan, Iran.
authors.forename: Vahid
authors.initials: V
authors.lastname: Shaygannejad
authors.forename: Mohsen
authors.initials: M
authors.lastname: Janghorbani
authors.forename: Abbas
authors.initials: A
authors.lastname: Ghorbani
authors.forename: Fereshteh
authors.initials: F
authors.lastname: Ashtary
authors.forename: Naser
authors.initials: N
authors.lastname: Zakizade
authors.forename: Vida
authors.initials: V
authors.lastname: Nasr
mesh_terms: D000293:Adolescent; D000328:Adult; D018592:Cross-Over Studies; D004311:Double-Blind Method; D005260:Female; D005632:Fructose / Q000031:analogs & derivatives* / Q000627:therapeutic use; D018682:GABA Agents / Q000627:therapeutic use*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008881:Migraine Disorders / Q000517:prevention & control*; D000077236:Topiramate; D016896:Treatment Outcome; D014635:Valproic Acid / Q000627:therapeutic use*
chemical_list: D018682:GABA Agents; D000077236:Topiramate; D005632:Fructose; D014635:Valproic Acid