Short answer
A medical cannabis tincture is a liquid extract of cannabis in alcohol, glycerin, or oil. Patients place drops under the tongue or swallow them. Evidence for migraine is limited. No large randomized trial has tested a cannabis tincture against placebo for migraine prevention or for stopping an attack. The American Headache Society states that evidence is not sufficient to recommend cannabinoids for primary headache disorders. Some patient surveys and one chart review report fewer migraine days after cannabis use. Those results do not prove cause and effect.
What the research shows
Migraine affects more than 10% of people worldwide, per the World Health Organization. A 2016 retrospective study in the journal Pharmacotherapy followed 121 patients with migraine at a Colorado clinic. Monthly migraine frequency dropped 40.4% after they started medical cannabis. The study had no control group. Doses and products varied between patients. The American Headache Society reviewed the published data in 2020 and found evidence insufficient for cannabinoids in acute or preventive migraine care.
medical marijuana for chronic migraines review
How tinctures are taken and how fast they work
Sublingual use absorbs through tissue in the mouth. Onset is 15 to 45 minutes. Swallowed tinctures pass through the liver. Onset is 30 to 90 minutes, with peak blood levels near 1 to 2 hours. Oral THC bioavailability is about 6%, with a range of 4% to 12%. Effects last 4 to 8 hours. Labels list milligrams of THC and CBD per milliliter or per drop. Label formats differ by state.
best medical cannabis strains for migraines
THC to CBD ratios
- High THC, low CBD, about 20:1. Highest risk of intoxication.
- Balanced, 1:1.
- CBD dominant, 1:20 or higher. Little or no intoxication.
CBD does not cause intoxication. THC does. Some patients report that THC helps with nausea and light sensitivity during an attack. CBD is studied for pain and inflammation, with mixed results in migraine.
THC vs CBD for Migraine Treatment: Which is More Effective?
Dosing steps
- Start at 1 to 2 mg THC, or a CBD-only tincture.
- Wait 2 hours before another dose.
- Log dose, time, headache intensity, and hours of relief.
- Do not mix with alcohol, opioids, or benzodiazepines.
- Review the log with a headache specialist after 4 to 8 weeks.
Side effects and limits
Common effects include drowsiness, dry mouth, dizziness, and slowed coordination. THC can raise heart rate and trigger anxiety. About 9% of adults who use cannabis develop dependence, per the National Institute on Drug Abuse. The figure rises to 17% for people who start in their teens. Frequent use of acute headache drugs can cause medication overuse headache. Cannabis may add to that pattern, but studies on the point are few.
Legal status in the US
Cannabis remains illegal under federal law. Each state runs its own medical program. A purchase needs a state medical card, or a government ID showing age 21 or older in adult-use states. Testing rules, potency limits, and taxes differ by state. Check the state program before buying.