A migraine day is defined as any calendar day on which a headache occurs which meets criteria listed in the protocol as per eDiary.

An adverse event (AE) is defined as any untoward medical occurrence in a patient or clinical investigation participant administered a pharmaceutical product which does not necessarily have a causal relationship with this treatment.

An AE is any untoward medical occurrence in a participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention.

12-lead resting ECGs will be recorded. Parameters include heart rate, PR interval, QT interval, QRS duration, and QT interval corrected using Fridericia's formula (QTcF).

Number of participants with abnormal change from baseline in vital sign measurements like systolic and diastolic blood pressure will be assessed.

Percentage of participants with abnormal change in clinical laboratory test results like hematology will be assessed.

The C-SSRS is a clinician-rated instrument that reports the severity of both suicidal ideation and behavior. Suicidal ideation was classified on a 5-item scale: 1 (wish to be dead), 2 (nonspecific active suicidal thoughts), 3 (active suicidal ideation with any methods \[not plan\] without intent to act), 4 (active suicidal ideation with some intent to act, without specific plan), and 5 (active suicidal ideation with specific plan and intent). Suicidal behavior is classified on a 5-item scale: 0 (no suicidal behavior), 1 (preparatory acts or behavior), 2 (aborted attempt), 3 (interrupted attempt), and 4 (actual attempt).

Female participants who have entered menarche are to be asked for the date of the first and last day of their most recent menstrual period.

Tanner's staging is used to assess growth and pubertal development.

The BRIEF 2 is an 86-item questionnaire assessing executive function. It consists of 2 indexes, Behavioral Regulation and Metacognition, which are then used to calculate an overall composite score. Higher scores indicate more executive difficulties

Pain Freedom is defined as a reduction in headache severity from moderate/severe at baseline to no pain.

The absence of a headache of moderate/severe intensity will be recorded by the participant in an electronic diary (eDiary) within 24 hours after taking double-blind study intervention during the prodrome in order to determine the attenuation of headache. The absence of moderate or severe headache are derived based on headache record and rescue use.