Clinical Profile of Botulinum Toxin A in Patients with Chronic Headaches and Cervical Dystonia

Background and objectives: Some evidence for the efficacy of botulinum toxin A as a preventive treatment for chronic primary headaches has been reported in randomized, controlled clinical studies. This study investigated the clinical profile of botulinum toxin A in a naturalistic clinical practice setting in a population of patients with cervical dystonia associated with chronic headache and a history of migraine.