A Controlled Trial of Erenumab in Migraine Prevention

A Phase 3 Japanese Randomized, Double-blind, Placebo-controlled Study to Evaluate the Efficacy and Safety of Erenumab in Migraine Prevention

The purpose of this study was to assess the efficacy and safety of erenumab for prevention of migraine in Japanese adults with episodic migraine (EM) and chronic migraine (CM).

Migraine prevention is an area of a large unmet medical need, with existing therapies often having modest efficacy and poor tolerability. Calcitonin gene-related peptide (CGRP) receptor antagonism is a novel approach to migraine preventive therapy. Erenumab is a human monoclonal antibody against canonical CGRP receptor. The present study is a phase 3 trial intended to assess the efficacy and safety of erenumab for prevention of migraine in Japanese adults with episodic migraine (EM) and chronic migraine (CM).

The study consists of a screening period (up to 7 weeks, including a 4-week baseline period), a 24-week double-blind treatment period (DBTP), a 28-week open-label treatment period (OLTP), and an 8-week safety follow-up period (12 weeks after the last dose of investigational product).

Inclusion Criteria:

• Subject has provided informed consent/assent prior to initiation of any study specific activities/procedures.

• Japanese subjects greater than or equal to 20 to less than or equal to 65 years of age upon entry into screening.

• History of migraine (with or without aura) for greater than or equal to 12 months before screening according to the International Headache Society Classification ICHD-3 (Headache Classification Committee of the International Headache Society, 2018) based on medical records and/or patient self-report

• Migraine frequency: Chronic Migraine (CM) or Episodic Migraine (EM) over the 3 months before screening based on the following criteria:

  1. CM is defined as greater than or equal to 15 headache days per month of which greater than or equal to 8 headache days on average across the 3 months meet criteria as migraine days
  2. EM is defined as less than 15 headache days per month of which at least 4 or more headache days on average across the 3 months meet criteria as migraine days

Exclusion Criteria:

• Subjects greater than 50 years of age at migraine onset.
• History of cluster headache or hemiplegic migraine headache.
• Unable to differentiate migraine from other headaches.
• Migraine with continuous pain, in which the subject does not experience any pain-free periods (of any duration) during the 1 month before the screening period.
• Malignancy, except non-melanoma skin cancers, cervical or breast ductal carcinoma in situ within the last 5 years.

Other exclusion criteria may apply