A Study Using Botulinum Toxin Type A as Headache Prophylaxis in Adolescents with Chronic Migraine


  • Study type

  • Study phase

  • Study IDs

  • Describes the nature of a clinical study. Types include:

    • Observational study — observes people and measures outcomes without affecting results.
    • Interventional study (clinical trial) — studies new tests, treatments, drugs, surgical procedures or devices.
    • Medical records research — uses historical information collected from medical records of large groups of people to study how diseases progress and which treatments and surgeries work best.
  • During the early phases (phases 1 and 2), researchers assess safety, side effects, optimal dosages and risks/benefits. In the later phase (phase 3), researchers study whether the treatment works better than the current standard therapy. They also compare the safety of the new treatment with that of current treatments. Phase 3 trials include large numbers of people to make sure that the result is valid. There are also less common very early (phase 0) and later (phase 4) phases. Phase 0 trials are small trials that help researchers decide if a new agent should be tested in a phase 1 trial. Phase 4 trials look at long-term safety and effectiveness, after a new treatment has been approved and is on the market.

  • Site IRB
    • Rochester, Minnesota: 12-009297
    NCT ID: NCT01662492
    Sponsor Protocol Number: 191622-103

About this study

To evaluate the efficacy and safety of Botulinum Toxin Type A versus placebo (normal saline) as headache prophylaxis in adolescents (children 12 to 17) with chronic migraine.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. If you need assistance understanding the eligibility criteria, please contact the study team.

See eligibility criteria

Inclusion Criteria:

  • Medical history of chronic migraine for at least 6 months
  • 15 or more headache days during a 4 week period

Exclusion Criteria:

  • Previous use of any botulinum toxin of any serotype for any reason
  • Diagnosis of Myasthenia gravis, Eaton-Lambert Syndrome, Amyotrophic Lateral Sclerosis
  • Treatment of headache using acupuncture, transcutaneous electrical stimulation (TENS), cranial traction, dental splints, or injection of anesthetics/steroids within 4 weeks prior to the week -4 screening visit
  • Use of any headache prophylaxis medication within 4 weeks prior to the week -4 screening visit

Participating Mayo Clinic locations

Study statuses change often. Please contact us for help.

Mayo Clinic Location Status

Rochester, Minn.

Mayo Clinic principal investigator

Kenneth Mack, M.D., Ph.D.

Closed for enrollment


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