title: Botulinum toxin type a for chronic migraine.
abstract: Chronic migraine (CM) is the leading cause of chronic daily headache, a common and debilitating headache syndrome. The management of CM patients is challenging, with only limited benefit from available oral preventive medications. Botulinum neurotoxin (BoNT) has been used extensively to treat disorders associated with increased muscle tone. More recent scientific data support an analgesic effect of the toxin. The pharmacokinetic and pharmacodynamic profiles of BoNT make it an appealing candidate for migraine prevention. Results from older clinical trials on the efficacy of the toxin in CM were inconclusive. However, recent trials using more stringent inclusion criteria have shown positive results, supporting the use of the toxin in some patients with this disorder. This review summarizes the scientific data on the analgesic properties of BoNT, as well as the clinical data on the efficacy of the toxin in treating CM.
authors.affiliation: The Neurologic Group of Bucks/Montgomery County, 800 West State Street, Suite 101, Doylestown, PA 18901, USA. aashkenazi2001@yahoo.com
authors.forename: Avi
authors.initials: A
authors.lastname: Ashkenazi
mesh_terms: D019274:Botulinum Toxins, Type A / Q000627:therapeutic use*; D002908:Chronic Disease; D006801:Humans; D008881:Migraine Disorders / Q000188:drug therapy*; D009465:Neuromuscular Agents / Q000627:therapeutic use*; D017063:Outcome Assessment, Health Care
chemical_list: D009465:Neuromuscular Agents; D019274:Botulinum Toxins, Type A