This study evaluates the efficacy of eptinezumab to prevent migraine and headache in patients with the combined diagnosis of migraine and medication overuse headache

Patients planned for randomization: 91 patients in the eptinezumab 100 mg group and 91 patients in the placebo group.

The total study duration from the Screening Visit to the Safety Follow-up Visit is approximately 36 weeks and includes a Screening Period (28-30 days), a Placebo-controlled Period (12 weeks), an Open-Label Period (12 weeks) and a Safety Follow-up Period (8 weeks). Patient will receive investigational medicinal product (IMP) at the Baseline Visit with either eptinezumab or placebo by IV infusion and at week 12 visit.

Inclusion Criteria:

• The patient has a diagnosis of migraine as defined by International Headache Society (IHS) International Classification of Headache Disorders (ICHD)-3 guidelines confirmed at the Screening Visit with a history of migraine onset of at least 12 months prior to the Screening Visit.
• The patient has ≥8 migraine days per month for each month on average within the past 3 months prior to the Screening Visit.
• The patient has a diagnosis of medication overuse headache (MOH) as defined by IHS ICHD-3 guidelines.
• The patient has headache on ≥15 days/month for each month within the past 3 months prior to the Screening Visit.
• The patient has regular overuse of one or more drugs that can be taken for acute and/or symptomatic treatment of headache, for >3 months.
• The patient has ≥15 to ≤26 headache days, of which ≥8 days were assessed as migraine days during the Screening Period, based on prospectively collected information in the eDiary.
• The patient overuses drugs that can be taken for acute and/or symptomatic treatment of headache during the Screening Period, based on prospectively collected information in the eDiary.
• The patient has demonstrated compliance with the Headache eDiary by entry of data for at least 24 of the 28 days of the Screening Period.
• The patient has had an onset of migraine at <50 years of age

Exclusion Criteria:

• The patient has experienced failure on a previous treatment targeting the calcitonin gene-related peptide (CGRP) pathway.
• The patient has confounding and clinically significant pain syndromes, (for example, fibromyalgia, chronic low back pain, complex regional pain syndrome).
• The patient has a diagnosis of acute or active temporomandibular disorder.
• The patient has a history or diagnosis of chronic tension-type headache, hypnic headache, cluster headache, hemicrania continua, new daily persistent headache, or unusual migraine subtypes such as hemiplegic migraine (sporadic and familial), recurrent painful ophthalmoplegic neuropathy, migraine with brainstem aura and migraine with neurological accompaniments that are not typical of migraine aura (diplopia, altered consciousness, or long duration).
• Patients with a lifetime history of psychosis, bipolar mania, or dementia are excluded. Patients 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 are also excluded.
• The patient 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 in- and exclusion criteria may apply