Clinical Trials

Inclusion Criteria:

• Males or females aged 18 to 65 years of age.
• A signed and dated informed consent document indicating that the subject has been informed of all pertinent aspects of the study including any known and potential risks and available alternative treatments.
• Chronic migraine meeting the diagnostic criteria listed in the International Classification of Headache Disorders (ICHD-III beta version, 2013)
• Body Mass Index (BMI) of 17.5 to 37.5 kg/m2, and a total body weight between 50 kg and 120 kg inclusive.
• Demonstrated compliance with the electronic headache diary during the run-in period headache data on a minimum of 22/28 days (80% diary compliance)

Exclusion Criteria:

• Onset of chronic migraine after the age of 50 years.
• Subject has received onabotulinum toxin A for migraine or for any medical or cosmetic reasons requiring injections in the head, face, or neck during the 6 months prior to study entry.
• Subject is using medications containing opioids (including codeine) or barbiturates (including Fiorinal®, Fioricet®, or any other combination containing butalbital) on more than 4 days per month for the treatment of migraine or for any other reason.
• Failed > 2 medication categories or > 3 preventive medications (within two medication categories) due to lack of efficacy for prophylactic treatment of episodic or chronic migraine after an adequate therapeutic trial
• Treatment with an investigational drug or device within 30 days of study entry or any prior exposure to a monoclonal antibody targeting the CGRP pathway.