A Study to Test if Fremanezumab is Effective in Preventing Chronic Migraine in Patients 6 to 17 Years of Age

The primary objective of the study is to evaluate the effectiveness of fremanezumab as compared to placebo for the preventive treatment of chronic migraine (CM).

Secondary objectives are to further demonstrate the efficacy of Fremanezumab as compared to placebo for the preventive treatment of CM, to evaluate the safety and tolerability of Fremanezumab in the preventive treatment of CM and to evaluate the immunogenicity of Fremanezumab and the impact of antidrug antibodies (ADAs) on clinical outcomes in participants exposed to Fremanezumab

The total duration of the study is planned to be 48 months.

Inclusion Criteria:

• The participant has a clinical history of recurrent headache consistent with the diagnosis of migraine for at least 6 months before screening, consistent with ICHD-3 criteria (Headache Classification Committee of the IHS 2013), and a history of ≥15 headache days per month, of which ≥8 headache days were assessed as migraine days per month in each of the 3 months prior to screening (visit 1).
• The participant or parent/caregiver maintain a prospectively collected headache diary
• The participant does not have chronic daily headache. For the purposes of this study, chronic daily headache is operationally defined as <4 headache-free days during the 28-day baseline period.

NOTE: Additional criteria apply; please contact the investigator for more information.

Exclusion Criteria:

• The participant is using medications containing opioids (including codeine) or barbiturates (including Fiorinal®, Fioricet®, or any other combination containing butalbital) for the treatment of migraine during the 3 months prior to the day of the screening visit.
• The participant has used an intervention/device (eg, scheduled nerve block or transcranial magnetic stimulation) for the treatment of migraine or in the head or neck area for any condition during the 2 months prior to the day of the screening visit.
• The participant has a current history of a clinically significant psychiatric condition, any prior history of a suicide attempt, or a history of suicidal ideation with a specific plan within the past 2 years, at the discretion of the investigator.
• The participant has an ongoing infection or a known history of human immunodeficiency virus infection, tuberculosis, Lyme disease, or chronic hepatitis B or C, or a known active infection of coronavirus disease 2019 (COVID-19).
• The participant has a past or current history of cancer.
• The participant is pregnant, nursing.
• The participant has a history of hypersensitivity reactions to injected proteins, including mAbs, or a history of Stevens-Johnson Syndrome or toxic epidermal necrolysis syndrome, or the participant is concomitantly using lamotrigine.
• The participant received a live attenuated vaccine (eg, intranasal flu vaccine, and measles, mumps, and rubella vaccine) within the 12-week period prior to screening. Note: If a medical need arises during the study, the participant may receive a live attenuated vaccine.
• The patient has a current or past medical history of hemiplegic migraine.

NOTE: Additional criteria apply; please contact the investigator for more information.

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