Conditions causing chronic facial pain such as Temporomandibular Disorder (TMD) and fibromyalgia

Use of headache prophylaxis medication within 4 weeks of the screening visit

Diagnosis of Myasthenia gravis, Eaton-Lambert Syndrome, Amyotrophic Lateral Sclerosis

Previous use of any botulinum toxin of any serotype for any reason

Skin infections or acne that would interfere with the injection sites

Acupuncture, transcutaneous electrical nerve stimulation (TENS), cranial traction, dental splints for headache, nociceptive trigeminal inhibition, occipital nerve block treatments, or injection of anesthetics/steroids within 4 weeks of screening.

Use of a Treatment Benefit Questionnaire in Patients With Chronic Migraine Treated With OnabotulinumtoxinA (BOTOX®)

What this study is about