A Study to Test if Fremanezumab Reduces Headache in Participants With Posttraumatic Headache (PTH)

A Phase 2, Multicenter, Randomized, Proof-of-Concept, Double-Blind, Placebo-Controlled, Parallel-Group Study, Including an Open-Label Period, Evaluating the Efficacy and Safety of 1 Subcutaneous Dose Regimen of Fremanezumab for the Treatment of Posttraumatic Headache (PTH)

This is a multicenter, randomized, double-blind, placebo-controlled, parallel-group study to evaluate the safety and efficacy of fremanezumab in adult participants aged 18 to 70 years, inclusive, for the prevention of PTH. The study will include a double-blind (DB) treatment period (12 weeks) and an open-label (OL) treatment period (12 weeks).

Inclusion Criteria:

• The participant has a body weight greater than or equal to (≥) 45 kilograms (kg).
• Traumatic injury to the head has occurred, defined as a structural or functional injury resulting from the action of external forces.
• The participant has a diagnosis of PTH.
• The participant is not using preventive medications for headache.
• Women of childbearing potential whose male partners are potentially fertile (that is, no vasectomy) must use highly effective birth control methods for the duration of the study and for 30 weeks after the last study drug administration. Men must be sterile or, if they are potentially fertile or reproductively competent (that is, not surgically or congenitally sterile) and their female partners are of childbearing potential, must use, together with their female partners, acceptable birth control methods for the duration of the study and for 30 weeks after the last study drug administration.

NOTE- Additional criteria apply, please contact the investigator for more information.

Exclusion Criteria:

• The participant has a previous history of brain imaging showing evidence of intracerebral hemorrhage, subdural or epidural hematomas, or subarachnoid hemorrhage as a consequence of the traumatic head injury. Brain images with structurally insignificant changes, as discussed and approved by the sponsor, will be reviewed by the sponsor on a case-by-case basis.
• The participant has PTH attributed to craniotomy.
• The participant has whiplash and subsequent headache but no history of head injury or concussion.
• The participant is using analgesic medications containing opioids (including codeine) or a barbiturate on average more than 15 days per month.
• The participant has had exposure to a monoclonal antibody (mAb) targeting the calcitonin gene-related peptide (CGRP) pathway (erenumab, eptinezumab, galcanezumab, and fremanezumab) during the 6 months prior to the day of the screening visit.
• The participant is currently being treated with onabotulinumtoxinA (for example, Botox, Dysport, Xeomin) application in the head or neck or received any such injection during the 3 months prior to the screening visit.
• The participant has been implanted with any electronic devices for headache prevention during the 3 months prior to the screening visit or is currently using any implanted or externally applied stimulator or device.
• The participant has been treated with a nerve block for head and/or neck during the 3 months prior to the screening visit.
• The participant is a pregnant or lactating woman or plans to become pregnant during the study.

NOTE- Additional criteria apply, please contact the investigator for more information.