A Study Comparing the Efficacy and Safety of Fremanezumab (TEV-48125) for the Prevention of Chronic Cluster Headache (CCH)

The purpose of the current study is to evaluate the efficacy and safety of Fremanezumab (TEV-48125), in the prevention of CCH in adult participants.


Eligibility Criteria:
Inclusion Criteria:

* The participant has a history of CCH according to the International Classification of Headache Disorders - 3 beta criteria (Headache Classification Committee of the International Headache Society \[IHS\] 2013) for greater than or equal to (≥)12 months prior to screening.
* The participant has a total body weight of ≥45 kilograms (kg) (99 pounds \[lbs\]).
* The participant is in good health in the opinion of the Investigator.
* Women of childbearing potential (WOCBP) whose male partners are potentially fertile (that is, no vasectomy) must use highly effective birth control methods for the duration of the study.
* Men must be sterile, or if they are potentially fertile/reproductively competent (not surgically \[for example, vasectomy\] or congenitally sterile) and their female partners are of childbearing potential, must agree to use, together with their female partners, acceptable birth control.
* If a participant is receiving Botox, it should be in a stable dose regimen, which is considered as having ≥2 cycles of Botox prior to screening. The participant should not receive Botox during the run-in period up to the evaluation period (12 weeks) where the primary endpoint is evaluated.

  * Additional criteria apply, please contact the Investigator for more information.

Exclusion Criteria:

* The participant has used systemic steroids for any medical reason (including treatment of the current cluster headache (CH) cycle within less than or equal to (≤)7 days prior to screening. The participant has used an intervention/device (for example, scheduled nerve blocks) for headache during the 4 weeks prior to screening.
* The participant has clinically significant hematological, renal, endocrine, immunologic, pulmonary, gastrointestinal, genitourinary, cardiovascular, neurologic, hepatic, or ocular disease at the discretion of the Investigator.
* The participant has evidence or medical history of clinically significant psychiatric issues determined at the discretion of the Investigator.
* The participant has a past or current history of cancer or malignant tumor in the past 5 years, except for appropriately treated non-melanoma skin carcinoma.
* The participant is pregnant or lactating.
* The participant has a history of hypersensitivity reactions to injected proteins, including monoclonal antibodies.
* The participant has participated in a clinical study of a monoclonal antibody within 3 months or 5 half-lives before administration of the first dose of the investigational medicinal product (IMP), whichever is longer, unless it is known that the participant received placebo during the study.
* The participant has a history of prior exposure to a monoclonal antibody targeting the calcitonin gene-related peptide (CGRP) pathway (AMG 334, ALD304, LY2951742, or fremanezumab). If participant has participated in a clinical study with any of these monoclonal antibodies, it has to be confirmed that the participant received placebo in order to be eligible for this study.
* The participant is an employee of the sponsor/participating study center who is directly involved in the study or is the relative of such an employee.
* The participant has an active implant for neurostimulation used in the treatment of CH.
* The participant is a member of a vulnerable population (for example, people kept in detention).
* The participant has a history of alcohol abuse prior to screening and/or drug abuse that in the Investigator's opinion could interfere with the study evaluations or the participant's safety.

  * Additional criteria apply, please contact the Investigator for more information.