The MiBlock study

Recruitment & Eligibility

Status: ot Recruiting

Sex: All

Target Recruitment: 170

Inclusion Criteria

Informed and written consent, In the case of women of childbearing potential (WOCBP) they have to commit to highly effective contraception in a period of 4 weeks after injection (for details, confer section 4.3), Ability to understand study procedures and to comply with them for the entire length of the study, Male or female, between 18 and 70 years of age, Masters a Scandinavian language at level sufficient to fully understand the written and verbal study information, Migraine, with or without aura, fulfilling the International Classification of Headache Disorders (ICHD) III criteria 1.3. for chronic migraine at time of inclusion, Chronic migraine at least for a period of 1 year prior to inclusion, Debut of episodic migraine before the age of 50, and chronic migraine before the age of 65., The condition is pharmacologically refractory as defined in this study as insufficient treatment effect, contraindication(s) or intolerable side effect(s) of at least 3 medications from at least 2 of the following medication (drug) classes a. Beta-blockers b. RA(A)S-inhibitors c. Calcium-antagonists d. Antiepileptic drugs e. Tricyclic antidepressants f. Botulinum toxin A g. CGRP antagonists, Subject has had no change in type, dosage or dose frequency of preventive headache medications < 3 months prior to baseline/screening, or a minimum of 5 half-lives, whichever is longer., Subject agrees to maintain current preventive headache medication regimens (no change in type, frequency, or dose) during the whole study period.

Exclusion Criteria

Allergy or hypersensitivity reactions to marcaine, lidocaine, xylocaine, adrenaline, any botulinum toxin or similar substances., Subject is currently participating or has participated in the last 3 months in another clinical study in which the subject has, is, or will be exposed to an investigational or non-investigational drug or device., Subject has had previous radiofrequency ablation, balloon compression, gamma knife, or chemical denervation (e.g. glycerol treatments) of the trigeminal ganglion or any branch of the trigeminal nerve., Subject has had previous radiofrequency ablation (including non-lesional pulsed radiofrequency), balloon compression, gamma knife, or chemical denervation (e.g. glycerol treatments) of the SPG., Subject has had blocks of short-acting anaesthetics of the SPG in the last 3 months., Subject is or has been treated with occipital nerve stimulation or deep brain stimulation., Ongoing abuse of drugs (including narcotics) or alcohol., More than 4 days of opioid use per month (including codeine and tramadol), and any use of barbiturates, Treatment with pharmacological substances prior to SPG-injection that may interact with BTA (aminoglycosides, spectinomycin, neuromuscular blockers, both depolarizing agents (such as succinylcholine) or non-depolarizing (tubocurarine derivates), and anticholinesterases)., Inadequate contraceptive use. Women of childbearing potential (WOCBP) who do not use highly effective contraception (HEC) or use other medication that may interact and/or otherwise reduce the efficacy of the contraceptiva in use., Subject has undergone facial surgery in the area of the pterygopalatine fossa or zygomaticomaxillary at the planned injection site that, in the opinion of the Investigator, may lead to an inability to properly conduct the procedure., Subject is unable to differentiate migraine from other concomitant headaches., Facial anomaly or trauma which renders the procedure difficult., Subject currently has an active oral or dental abscess or a local infection at the site of injection based on present symptoms., Subject has been diagnosed with any major infectious processes such as osteomyelitis, or primary or secondary malignancies involving the face that have been active or required treatment in the past 6 months., Patients with comorbid psychiatric disorders with psychotic or other symptoms making compliance with the study protocol difficult, at the discretion of the investigator, Patients exhibiting a high degree of comorbidity and/or frailty associated with reduced life expectancy or high likelihood of hospitalization, at the discretion of the investigator, Patients with disorders that severely inhibits lacrimation, at the discretion of the investigator, Patients with previous ischemic cardiovascular and cerebrovascular disorder with, in the opinion of the investigator, a moderate to high risk of new ischemic episodes., Known infection or history of human immunodeficiency virus, tuberculosis, or chronic hepatitis B or C infection., Subject has a history of bleeding disorders or coagulopathy, that, in the opinion of the Investigator, may lead to an inability to properly conduct the procedure., Unable to stop antithrombotic medication e.g. platelet aggregation inhibitors and/or anticoagulation therapy, prior to procedure., Subject with secondary headache conditions, with the exception of medication overuse headache., The patient cannot participate or successfully complete the study, in the op