Cannabis for the Prophylactic Treatment of Migraine

Ki vehet részt

• Subject is willing and able to give signed informed consent
• Male and female patients aged 25 years or older
• History of migraine for at least 12 months as diagnosed by the International Classification of Headache Disorders (ICHD-3)
• Chronic migraine for at least the previous 3 months prior to screening, as diagnosed by ICHD-3
• Migraine preventative medications (including Botulinum toxin injections) are permitted if dose is stable for the 3 month period prior to randomization, and no change to dose is planned for the entire duration of the study
• Using a reliable method of contraception for females of child-bearing age
• Failure of at least 2 prior migraine preventatives, either due to lack of efficacy with an appropriate trial of the medication, or due to lack of tolerability
• Able to follow study procedures, fill out headache diaries, and complete questionnaires
• Completion of at least 90% of the headache diary during the one month baseline period

Ki nem vehet részt

• Regular use of cannabis for medical or recreational reasons during the previous 12 months
• History of significant cardiovascular or cerebrovascular disease, such as previous myocardial infarction, stroke, or peripheral vascular disease
• Use of interventions or devices, such as nerve blocks, sphenopalatine ganglion blocks, vagal nerve stimulators, and transcranial magnetic stimulators during the baseline period (weeks -4 to 0). These treatments will also be prohibited during the period of therapy (weeks 0 to 12)
• Use of transitional therapies such as a course of steroids or a dihydroergotamine protocol during the baseline period (weeks -4 to 0). These treatments will also be prohibited during the period of therapy (weeks 0 to 12)
• Overuse of triptan, dihydroergotamine, opioid, or barbiturate medications, defined as 10 or more days per month in the 3 months prior to randomization
• Overuse of simple analgesics (such as acetaminophen, ibuprofen, aspirin), and non-steroidal anti-inflammatories (such as naproxen, ketorolac, diclofenac, etc.) defined as 15 or more days per month in the 3 months prior to randomization
• Any secondary headache, such as headache related to intracranial hypertension, intracranial hypotension, hydrocephalus, intracranial mass lesion, etc
• Active or significant history of major mental illness, including severe depression, or anxiety, and any history of psychosis or schizophrenia
• History of or current substance use disorder
• History of hypertension greater than 160/100 and not medically treated
• Any past history of seizure disorder
• Liver disease or liver enzymes two or more times the upper limit of normal at baseline
• Any disorder or condition leading to hypersomnolence or excessive daytime drowsiness, such as narcolepsy, excessive use of sedatives/hypnotics, etc
• Any other medical condition that in the opinion of the investigators may pose a health risk to the subject if entered into the clinical trial
• Severe renal disease or GFR more than 30% below expected
• Other active primary headaches, such as cluster headache, hemicrania continua, etc
• Pregnant, planning to become pregnant, or breastfeeding