
    the study was terminated prematurely due to poor recruitment.
  
['migraine', 'caffeine withdrawal']
['caffeine']

        Inclusion Criteria:

          -  migraine present for at least 1 year and fulfilling diagnostic criteria (ICHD-3 beta)

          -  =/> 3 migraine attacks per month

          -  no migraine prophylaxis the last month

          -  consumption =/> 300 mg and </= 800 mg caffeine per day the last month

          -  signed consent

        Exclusion Criteria:

          -  suspicion of medication-overuse headache

          -  pregnancy and breast feeding

          -  serious co-morbidity or conditions requiring Medical treatment or caution

          -  working night shift

          -  use of drugs with moderate or major interactions with caffeine
      