Botulinum Toxin for Pediatric Migraine: A Retrospective Multisite Cohort Study

Onabotulinum toxin A is effective in adult chronic migraine, but the efficacy is not well established in adolescent patients. The objective of this study is to describe the safety and efficacy of onabotulinum toxin A and incobotulinum toxin A for adolescent chronic migraine headache. We performed a chart review of adolescents who received onabotulinum toxin A or incobotulinum toxin A for headache prevention. Demographic information and baseline headache characteristics were collected. The primary end point was a 50% reduction in headache frequency. Secondary outcome measures included reduction in headache frequency, repeat appointments for injections, reduction in other migraine medications, and adverse events. We included 51 adolescents who received at least one injection of either incobotulinum toxin A or onabotulinum toxin A for chronic migraine. Mean age at first dose was 16.0 (1.1; 13 to 17), (S.D. and range). Patients averaged 24.0 headache days per month (7.6; 4 to 28), (S.D. and range) before injection. In addition, 36 of the 51 adolescents (71%) were experiencing continuous headaches. Thirty-five (69%) adolescents had experienced 50% reduction in headache days by the time of first follow-up, which occurred on average at 16.6 weeks from initial injection (11.5; 2 to 55.7) (S.D. and range). Adolescents reported an average decrease of 13.1 headaches days per month. Only two adolescents reported side effects (4%), which were neck soreness and headache following injection. Botulinum toxin had better efficacy in our adolescent migraine population than has been demonstrated in other studies.