title: Chronic Migraine Responding to Intravenous Thiamine: A Report of Two Cases.
abstract: BACKGROUND
  Migraine is a risk factor for thiamine deficiency and Wernicke's encephalopathy (WE). WE is a highly underdiagnosed condition. The misdiagnosis is associated more with early or mild WE. The interrelation between migraine and thiamine deficiency is unknown
  
  
  METHODS
  Here, we report two female patients with chronic migraine. During examinations, we also noted clinical signs pertinent with a diagnosis of WE. Both patients had low blood thiamine level. Intravenous thiamine supplementation led to the improvement of both WE and associated headaches.
  
  
  CONCLUSIONS
  Nausea, vomiting, and anorexia of migraine may lead to mild to moderate thiamine deficiency and WE. Review of the literature suggests that WE in early or subclinical form will have nonspecific symptoms that may include frequent headache, nausea, vomiting, and anorexia. So, WE in the early stage may simulate migrainous features and this will further aggravate thiamine deficiency and a vicious cycle may be formed, and that will progressively increase the chronicity of headaches and other features. Breaking of this cycle by thiamine supplementation might be a promising therapy in a subset of patients with chronic migraine.
  
  
  CONCLUSIONS
  Thiamine deficiency due to nausea, vomiting and anorexia of migraine may further aggravate migraine like headaches in cyclical pattern.
authors.affiliation: Department of Neurology, Smt. B. K. Shah Medical Institute and Research Centre, Sumandeep Vidyapeeth University, Piperia, Baroda, Gujarat, India.
authors.forename: Sanjay
authors.initials: S
authors.lastname: Prakash
authors.affiliation: Department of Neurology, Dr. Ram Manohar Lohia Institute of Medical Sciences, Gomti Nagar - Lucknow, India.
authors.forename: Ajai
authors.initials: A
authors.lastname: Kumar Singh
authors.affiliation: Department of Neurology, Smt. B. K. Shah Medical Institute and Research Centre, Piperia, Sumandeep Vidyapeeth University, Baroda, Gujarat, India.
authors.forename: Chaturbhuj
authors.initials: C
authors.lastname: Rathore
mesh_terms: D061605:Administration, Intravenous; D000328:Adult; D005260:Female; D006801:Humans; D008881:Migraine Disorders / Q000150:complications* / Q000188:drug therapy*; D013831:Thiamine / Q000008:administration & dosage*; D014803:Vitamin B Complex / Q000008:administration & dosage*; D014899:Wernicke Encephalopathy / Q000150:complications* / Q000188:drug therapy*
chemical_list: D014803:Vitamin B Complex; D013831:Thiamine
keywords: Wernicke's encephalopathy; chronic migraine; thiamine