A 1-year Trial to Inform About Long-term Exposure to Eptinezumab in Participants With Chronic Cluster Headache (cCH)

Interventional, Open-label, Fixed-dose Multiple Administration Study to Evaluate Long-term Treatment With Eptinezumab in Patients With Chronic Cluster Headache

The main goal of this trial is to inform about long-term safety and tolerability of eptinezumab in participants with chronic cluster headache.

The participants who take part in this trial will be asked to stay in the trial for about a year. The participants will be asked to visit the trial site 7 times during the trial. In between trial site visits, they will have scheduled phone calls with the trial site staff. They will also be asked to keep track of their cluster headaches at home with a headache diary.

Inclusion Criteria:

• The participant has a diagnosis of cCH as defined by International Headache Society (IHS) International Classification of Headache Disorders third edition (ICHD-3) classification with a history of cCH of at least 12 months prior to the Screening Visit.
• The participant has a medical history of onset of cluster headache at ≤50 years of age.
• The participant has an adequately documented record of previous abortive, transitional and preventive medication use for cCH, for at least 12 months prior to the Screening Visit.
• The participant is able to distinguish cluster headache attacks from other headaches (such as tension-type headaches, migraine).

Exclusion Criteria:

• The participant has experienced failure on a previous treatment targeting the calcitonin gene-related peptide (CGRP) pathway (anti-CGRP monoclonal antibodies [mAbs] and gepants).
• The participant has confounding and clinically significant pain syndromes (for example, fibromyalgia, complex regional pain syndrome).
• The participant has a history or diagnosis of chronic tension-type headache, hypnic headache, hemicrania continua, new daily persistent headache, chronic migraine or unusual migraine subtypes such as hemiplegic migraine (sporadic and familial), recurrent painful ophthalmoplegic neuropathy, migraine with neurological accompaniments that are not typical of migraine aura (diplopia, altered consciousness, or longer than 1 hour).
• Participants with a lifetime history of psychosis, bipolar mania, or dementia. Participants with other psychiatric conditions whose symptoms are not controlled or who have not been adequately treated for a minimum of 6 months prior to Screening Visit.
• The participant has attempted suicide or is, at Screening Visit, at significant risk of suicide.
• The participant has a history of clinically significant cardiovascular disease, including uncontrolled hypertension, vascular ischaemia or thromboembolic events (for example, cerebrovascular accident, deep vein thrombosis, or pulmonary embolism).

Other inclusion and exclusion criteria may apply.