Only one small study has rigorously tested CBD against smoking: Morgan and colleagues, in 2013, gave smokers a CBD inhaler for a week, and observed a roughly 40% drop in the number of cigarettes smoked. That's the figure you'll see everywhere online. What you'll see far less often are its limits: 24 participants, one week of follow-up, a device that doesn't exist in a consumer version.
CBD isn't a validated treatment for smoking cessation, and it isn't a nicotine substitute either. What research has shown is a plausible mechanism — an effect on the attentional reflex toward smoking-related cues — not demonstrated effectiveness for quitting smoking. Here's what the two reference studies on the subject actually say, and what has proven effective outside of CBD.
Key points — A 2013 pilot study (Morgan et al.) showed a roughly 40% drop in the number of cigarettes smoked among smokers using a CBD inhaler for one week, against no change under placebo. A 2018 study (Hindocha et al.) showed that CBD reduced attention paid to visual cigarette cues, with no demonstrated effect on craving or withdrawal symptoms themselves. Both studies remain small and haven't been confirmed by larger trials. CBD is neither a nicotine substitute nor a recognized treatment for smoking cessation — the validated options remain nicotine replacement therapies, varenicline and support from a tobacco specialist.
The Morgan 2013 study: what it actually tested
The reference study, published in Addictive Behaviors, split 24 volunteer smokers into two groups: a CBD inhaler to use as needed, or a placebo inhaler, for one week. Result: the placebo group showed no change in their consumption. The CBD group cut the number of cigarettes smoked by about 40% over the period.
This is a statistically clear-cut result for a study of this size, which is exactly why it's cited so often. But it needs to be read for what it is: a pilot study, designed to explore a lead, not to validate it definitively.
The limits that often go unmentioned
Three limitations change the real scope of this result:
- The sample is small. 24 people is enough to detect a signal, not enough to draw a conclusion that generalizes to all smokers.
- The follow-up is short. One week says nothing about what happens after a month, six months or a year — smoking relapses in fact most often occur after the first few weeks.
- The measured criterion isn't quitting smoking. The study tracked the number of cigarettes smoked, not the rate of people who quit for good. Cutting down and quitting smoking are two different things.
No larger clinical trial has since confirmed these results on actually quitting smoking. A clinical trial exploring CBD for reducing cigarette consumption is registered and under way; its results, as of September 2026, haven't been published yet.
Hindocha 2018: a plausible mechanism, not proof of effectiveness
The second frequently cited study, published in the journal Addiction by Hindocha and colleagues, explored a different mechanism. In 30 dependent smokers, a single 800 mg dose of CBD reduced attentional bias toward cigarette images — in other words, participants on CBD spontaneously looked at these images less and found them less appealing than under placebo.
The important point, often left unmentioned: this same study showed no effect of CBD on craving or on the withdrawal symptoms felt by participants. The mechanism observed is interesting for research, but it didn't translate into a reduction in the craving itself. And the dose used, 800 mg in a single intake, bears no relation to what a shop product contains.
Why CBD isn't a nicotine substitute
Tobacco dependency has two well-identified components: a physical dependency on nicotine, which acts on specific nicotine receptors, and a behavioural dependency, made up of repeated gestures and associations (the coffee that calls for a cigarette, the break that calls for a cigarette). CBD doesn't act on nicotine receptors: it therefore doesn't offset the physical craving for nicotine, unlike a patch, a gum or a spray. This is a fundamental pharmacological difference, not a marketing nuance.
The trap of the tobacco-CBD joint
A very common habit is rolling CBD flowers with tobacco, like a regular joint. That's precisely the opposite of what's needed if the goal is to break free of dependency: every hit keeps supplying nicotine, and so keeps the physical dependency going, while exposing you to the same combustion by-products as an ordinary cigarette. Smoking remains harmful to health, whatever plant is being smoked — it isn't a question of CBD versus tobacco, it's a question of combustion.
Moving from the joint to a vaporizer: a concrete step, not a miracle solution
If the goal is to gradually move away from the tobacco-CBD habit, vaporizing a CBD flower without tobacco changes at least one variable: it avoids combustion, provided you use a vaporizer set to a suitable temperature rather than a flame. This isn't a minor point: combustion is the main source of toxic substances inhaled when smoking, whatever the product being burned. But it does nothing to address nicotine dependency if you keep smoking regular tobacco elsewhere. The two issues — moving away from combustion and moving away from nicotine — are dealt with separately. Our CBD vaporizer guide and our article on the real risks of smoking CBD cover the precautions to know, including the side effects and interactions to check before consuming it regularly. Worth a reminder along the way: CBD doesn't get you high, so it isn't the habit that changes either, only the substance.
The aids that have proven effective
For quitting smoking, the options with effectiveness established by robust clinical trials remain, to date:
- Nicotine replacement therapies — patches, gums, lozenges, spray — which cover the physical craving for nicotine.
- Varenicline, a prescription treatment that acts directly on nicotine receptors.
- Support from a tobacco specialist (tabacologue), in private practice or a health centre, often the factor that makes the difference over time.
- Tabac Info Service, on 39 89, a free public smoking-cessation helpline (France's national tobacco quitline), with personalized follow-up if needed.
CBD can potentially be added to one of these approaches if you feel it may help, but nothing today allows anyone to say it can replace them.
Sources
- Morgan C.J.A., Das R.K., Joye A., Curran H.V., Kamboj S.K., « Cannabidiol reduces cigarette consumption in tobacco smokers: preliminary findings », Addictive Behaviors, 2013.
- Hindocha C. et al., « Cannabidiol reverses attentional bias to cigarette cues in a human experimental model of tobacco withdrawal », Addiction, 2018.
- Tabac Info Service, French public smoking-cessation service — tabac-info-service.fr.
- French Public Health Code and smoking-cessation guidelines — check service-public.fr for current details.
