* Originally published May 12, 2013 — Updated October 2026
Can cannabis help people who suffer from migraine?
When we originally published this article in 2013, the scientific answer was essentially: possibly, but there was not enough clinical evidence to know.
More than a decade later, the picture has changed—but perhaps not as much as some headlines suggest.
There is now clinical evidence that certain cannabis preparations can reduce symptoms during an acute migraine attack. However, the evidence remains limited, and cannabis has not become a standard, first-line migraine treatment.
What we knew in 2013
Our original article quoted the U.S. Institute of Medicine’s assessment that there were almost no clinical data supporting the use of marijuana or cannabinoids for migraine. At the time, that was a fair representation of the evidence.
The article also discussed the long history of cannabis being used for headache and migraine, including historical references dating back centuries, as well as reports from patients who said cannabis reduced their symptoms.
Ethan Russo, a neurologist and researcher specializing in cannabis and the endocannabinoid system, proposed several possible mechanisms through which cannabinoids might influence migraine, including interactions with neurotransmitter and pain-signalling systems.
But there was an important distinction: A plausible biological mechanism and a history of traditional use do not demonstrate that a treatment works in a controlled clinical setting. That distinction remains important today.
What has changed?
Research into cannabis and cannabinoids has expanded considerably since 2013.
A 2022 review of medical cannabis for migraine identified 12 publications involving approximately 1,980 participants. The authors reported potentially beneficial effects on migraine frequency and associated nausea and vomiting, but also emphasized that most of the available evidence came from observational studies and that better-designed clinical trials were needed.
A 2023 review similarly concluded that preliminary evidence suggested potential benefits from cannabis and cannabinoid therapies, while stressing the need for randomized controlled trials to establish appropriate formulations, doses and indications.
That missing randomized evidence has now started to arrive.
The first randomized clinical trial
A particularly important development came from a randomized, double-blind, placebo-controlled crossover trial published in 2026.
The study enrolled 92 adults with migraine, who collectively treated 247 migraine attacks. Participants tested four vaporized preparations across separate attacks:
– 6% THC
– 11% CBD
– 6% THC + 11% CBD
– placebo cannabis flower
The combination of THC and CBD produced significantly better results than placebo at two hours.
Pain relief: 67.2% with THC + CBD versus 46.6% with placebo.
Pain freedom: 34.5% versus 15.5%.
The THC + CBD combination also produced sustained benefits for some outcomes at 24 and 48 hours. THC alone improved pain relief but did not significantly improve pain freedom or freedom from the most bothersome symptom. CBD alone did not demonstrate a significant benefit over placebo for the main two-hour outcomes.
This is important because it provides something that was missing when our original article was published: randomized clinical evidence that a specific cannabis formulation can have an effect on an acute migraine attack.
However, it does not establish that cannabis in general is an effective migraine treatment.
The study tested specific concentrations and a specific route of administration. It also involved a relatively small number of participants and treated a limited number of attacks.
THC and CBD are not interchangeable
One of the clearest lessons from the newer research is that we should not simply refer to “cannabis” as though all cannabis products have the same medical effect. THC and CBD have different pharmacological properties.
In the 2026 randomized trial, the THC + CBD combination produced the strongest overall results, while the CBD-dominant preparation did not significantly outperform placebo for the principal acute outcomes.
Therefore, the statement “CBD helps migraines” is currently much stronger than the evidence allows.
Likewise, saying that “cannabis helps migraines” without specifying the product, cannabinoid content, dose and route of administration can be misleading.
What about preventing migraines?
Some studies have reported reductions in migraine frequency among people using medical cannabis. However, observational studies cannot reliably establish that cannabis itself caused the improvement.
People who use cannabis may differ from non-users in many other ways. They may have different migraine severity, other treatments, lifestyle factors or medical conditions.
Cannabis also has not been established as a first-line preventive treatment for migraine. The fact that cannabis may help some people does not mean that it is risk-free. One concern is medication-overuse headache (MOH).
Other concerns associated with THC-containing cannabis include psychoactive effects, impairment and the potential for dependence. The 2025 neurological review of cannabinoids and headache specifically highlighted concerns about overuse headache, cognitive effects and psychological dependence, but concluding that more controlled trials and long-term safety data needs to be produced.
The route of administration also matters. Smoking or vaporizing cannabis introduces additional considerations that do not necessarily apply to pharmaceutical cannabinoid preparations or oral products.
So, does cannabis help migraines?
The most accurate answer in 2026 is: it may help some people, and there is now randomized evidence supporting a specific THC + CBD preparation for acute migraine—but cannabis cannot yet be considered a universally proven or standard migraine treatment. The evidence is considerably stronger than it was in 2013, but it is still developing.
The 2026 randomized trial is encouraging, particularly because the THC + CBD combination produced significantly better acute outcomes than placebo. At the same time, a recent systematic review of randomized trials concluded that the evidence does not support a class-wide effect for cannabinoid treatments and that effectiveness appears to depend on the cannabinoid composition, formulation and route of administration.
In other words: Cannabis is not one medicine.
Different cannabinoids, ratios, doses and delivery methods can produce very different results.
What should migraine patients take from this?
People who suffer from migraine should not assume that cannabis or CBD is automatically a safer or more effective alternative to established migraine treatments.
For someone considering cannabis, the relevant questions are more specific:
What cannabinoid preparation is being used?
How much THC and CBD does it contain?
What dose is appropriate?
How is it administered?
Is it being used for an acute attack or migraine prevention?
Could it interact with other medications?
Is frequent use increasing the risk of headache or medication-overuse headache?
Is there a better-supported migraine treatment available?
These are questions that should be discussed with a qualified healthcare professional, particularly for people with frequent or severe migraine attacks.
From almost no evidence to the first clinical trial
Looking back at our 2013 article, the biggest change is not that science has definitively proved cannabis to be a migraine cure.
The significant change is that researchers have finally begun moving beyond historical reports, patient anecdotes and observational studies toward controlled clinical trials.
In 2013, we could reasonably say:
“There is not enough clinical evidence to know whether cannabis works for migraine.”
In 2026, a more accurate statement would be:
“There is now clinical evidence that certain THC-containing cannabis preparations, particularly a THC + CBD combination, may provide acute relief during migraine attacks. However, evidence for cannabis as a broader migraine treatment—including long-term prevention—remains limited, and important questions about dosing, formulation, safety and repeated use remain unanswered.”
That is a considerably more useful conclusion than either claiming that cannabis is a miracle treatment—or dismissing the possibility entirely.
Original Article
Is it right, that cannabis helps in migraine?
Answers:
(Institute of Medicine (U.S.A.)):
There is clearly a need for improved migraine medications. Sumatriptan is currently the best available medication for migraine headaches, but fails to completely abolish migraine symptoms in about 30 percent of migraine patents. Marijuana has been proposed numerous times as a treatment for migraine headaches (reviewed by Russo), but there are almost no clinical data on the use of marijuana or cannabinoids for migraine. Our search of the literature since 1975 yielded only one scientific publication on the subject. This report presents three cases in which cessation of daily marijuana smoking was followed by migraine attacks, which is not convincing evidence that marijuana relieves migraine headaches. (…) Various individuals have claimed that marijuana relieves their migraines, but at this stage there are no conclusive clinical data or published surveys about the effect of cannabinoids on migraines.
Joy JE, Watson SJ, Benson JA, eds. Marijuana and medicine: Assessing the science base. Institute of Medicine. Washington DC: National Academy Press, 1999.
(Anonymous):
I am a scientist at a medical school, studying basic cancer research. I suffer from severe migraine attacks. (…) About half of my migraine attacks are severe enough that I must spend the night in the hospital getting rehydrated by intravenous infusions, and given very powerful narcotics such as morphine or Demerol. Under my doctor’s care, I tried every legally available migraine and anti-nausea drug (…). None had any effect at all on my symptoms. (…) After reading about chemotherapy patients using marijuana to treat similar sounding nausea, I tried smoking it as a treatment during an attack of migraine. Amazingly, it alleviated my symptoms, particularly the nausea, but the headache pain as well.
Website of Lester Grinspoon: http://www.rxmarihuana.com/migraines_hms.htm.
See also: Grinspoon L, Bakalar JB. Marihuana, the forbidden medicine. New Haven: Yale University Press, 1993, 1997. (Translated into several languages).
(Ethan Russo):
Cannabis has a documented history as a treatment for migraine dating back at least 1200 years to the work of Sabur ibn Sahl in Persia. Folk use in Sumeria and India may extend that figure back as much as 4000 years. Cannabis was a mainstream medicine in Europe and the USA for migraine between 1842 and 1942 before its prohibition under false pretenses. Cannabis has been shown to affect multiple migraine mechanisms via effects as an anti-inflammatory, and through several neurotransmitter systems (serotonin, dopamine, and glutamate), as well as by interactions with the endogenous opioid system. Many migraineurs report improvement with cannabis. This figure is about 80% in my experience.
More on cannabis in migraine in:
Russo EB. Cannabis for migraine treatment: The once and future prescription? An historical and scientific review. Pain 1998;76(1):3-8.
Russo EB. Hemp for headache: An in-depth historical and scientific review of cannabis in migraine treatment. J Cannabis Ther 2001;1(2):21-92.
Russo EB. Cannabis and Cannabinoids in Migraine Treatment. In: Grotenhermen F, Russo E, eds. Cannabis and Cannabinoids. Pharmacology, toxicology, and therapeutic potential. Haworth Press, Binghamton/New York 2001, in press.
