CBD for Quitting Smoking: What the Research Says

An Honest Look at a Complicated Subject

CBD is everywhere. It’s in gas stations, grocery stores, and your aunt’s medicine cabinet. It’s been claimed to help with everything from chronic pain to insomnia to acne. And yes — there’s a growing conversation about whether CBD can help people quit smoking.

Here’s my approach to this topic: neither cheerleader nor skeptic. The research that exists is genuinely interesting. It’s also genuinely limited. If you’re considering CBD as part of your quit plan, you deserve to know exactly what the science says, what it doesn’t say, and what questions remain unanswered.

I’ve looked into this myself, during one of my quit attempts. I was willing to try just about anything that might take the edge off. What I found was promising enough to be worth discussing — and incomplete enough that I can’t tell you it’ll work.

Let’s walk through it together.

The Research: What We Actually Know

The 2013 UCL Pilot Study

The study that put CBD and smoking cessation on the map was conducted by researchers at University College London and published in Addictive Behaviors in 2013.

The design: 24 smokers were randomly assigned to receive either a CBD inhaler or a placebo inhaler. They were instructed to use the inhaler whenever they felt the urge to smoke, over a one-week period.

The results:

• The placebo group showed no change in cigarette consumption
• The CBD group reduced their cigarette consumption by approximately 40%
• The effect was significant and unexpected given the small sample size

The limitations:

• 24 participants is a very small sample
• The study was only one week long
• There was no follow-up to see if the reduction persisted
• Participants were not trying to quit — they were simply told to use the inhaler when they wanted a cigarette

Despite these limitations, a 40% reduction is a striking result. It was enough to generate significant scientific interest and inspire follow-up research.

The 2018 Attentional Bias Study

A study published in Addiction in 2018, also from UCL researchers, explored a different angle: whether CBD could reduce the attentional bias that smokers have toward cigarette-related cues.

What is attentional bias? When you’re addicted to something, your brain automatically notices cues related to that substance. A smoker’s eyes are drawn to cigarette ads, to other people smoking, to ashtrays, to lighters. This happens below conscious awareness and is a powerful driver of cravings and relapse.

The design: Thirty smokers received either 800mg of oral CBD or a placebo in a single dose, then were shown images of cigarette-related and neutral images while their eye movements and responses were tracked.

The results:

• CBD significantly reduced attentional bias toward cigarette-related images — particularly in a “withdrawal” state (after overnight abstinence from smoking)
• CBD also reduced the subjective “pleasantness” of cigarette-related images
• CBD did not significantly reduce cravings or withdrawal symptoms in this single-dose design

What this means: CBD may help disrupt the automatic cognitive patterns that keep smokers hooked — the unconscious pull toward cigarette cues that makes quitting so hard. This is a mechanism of action that’s different from NRT (which replaces nicotine) or varenicline (which blocks nicotine receptors). It’s operating at the level of habit and attention.

The 2022 Hindocha et al. Follow-Up

Morgan and Hindocha’s research group continued exploring CBD for tobacco cessation. Their work, discussed at addiction conferences and in subsequent publications, has explored CBD’s effects on memory reconsolidation — the process by which established memories (including drug-related memories) are recalled, destabilized, and re-stored.

The theory: if CBD can interfere with the reconsolidation of smoking-related memories, it might weaken the association between cigarettes and reward. This is speculative but builds on established research showing CBD’s effects on memory processes in animal models.

Other Relevant Research

• A 2019 review in Substance Abuse: Research and Treatment concluded that CBD shows “promising, though preliminary” evidence for treating various substance use disorders, including tobacco dependence
• Animal studies have shown that CBD can reduce nicotine self-administration and conditioned place preference (an indicator of drug reward) in rats
• CBD has been shown to reduce anxiety in multiple clinical trials — relevant because anxiety is a major driver of smoking and relapse

How CBD Might Help (The Proposed Mechanisms)

No one has definitively established how CBD works for smoking cessation, but several plausible mechanisms have been identified:

1. Anxiety Reduction

CBD has well-documented anxiolytic (anti-anxiety) effects. A study published in Neuropsychopharmacology found that CBD significantly reduced anxiety during simulated public speaking in people with social anxiety disorder.

Since anxiety is one of the primary triggers for smoking and one of the most uncomfortable withdrawal symptoms, reducing anxiety during cessation could meaningfully improve quit rates. Many people smoke specifically to manage anxiety — if CBD provides an alternative anxiety management tool, the need for the cigarette decreases.

2. Disruption of Habit Loops

The attentional bias research suggests CBD may help break the automatic connection between environmental cues and the urge to smoke. This is significant because habit loops — cue, craving, behavior, reward — operate below conscious control. Any intervention that weakens the cue-craving link gives the conscious, decision-making part of your brain a better chance to intervene.

3. Effects on the Endocannabinoid System

The endocannabinoid system plays a role in reward processing, stress response, and habit formation. CBD interacts with this system (though it doesn’t bind to CB1 receptors the way THC does). The theory is that CBD may modulate the reward pathways that nicotine has hijacked, making cigarettes less rewarding without producing intoxication.

4. Sleep Improvement

Insomnia and disrupted sleep are common during nicotine withdrawal. Some evidence suggests CBD may improve sleep quality, which could indirectly support cessation by reducing the fatigue and irritability that lead to relapse.

What We Don’t Know (And It’s a Lot)

Honesty requires acknowledging the significant gaps in the evidence:

• No large-scale randomized controlled trials have been completed specifically for CBD and smoking cessation. The existing studies have small sample sizes.
• Optimal dosing is unknown. The 2018 attentional bias study used 800mg — a very high dose. The 2013 inhaler study didn’t specify CBD dose per puff. We don’t know what dose is effective, or whether the route of administration matters.
• Long-term effects are unstudied. No one has tracked CBD use for smoking cessation over months or years.
• Drug interactions are not fully mapped. CBD inhibits certain liver enzymes (CYP3A4 and CYP2C19), which can affect the metabolism of other medications. If you’re taking prescription drugs, including cessation medications, CBD could alter their effectiveness.
• The mechanism of action is not confirmed. We have theories, not proof.
• We don’t know if CBD works better than existing treatments. No head-to-head comparison with NRT, varenicline, or bupropion exists.

The FDA Situation

As of 2026, CBD is not FDA-approved for smoking cessation. The only FDA-approved CBD product is Epidiolex, which is approved for specific seizure disorders.

The CBD products sold in stores, online, and at gas stations are classified as supplements, not medications. This means:

• They do not undergo FDA review for safety or efficacy
• Their labels may not accurately reflect their contents
• Quality varies enormously between products and brands
• Some products have been found to contain less CBD than labeled, or to contain unlabeled THC, heavy metals, or pesticides

This doesn’t mean CBD doesn’t work. It means the product you buy might not contain what you think it contains, and nobody is checking.

If You Want to Try CBD: A Practical Guide

If you’ve read the research and want to try CBD as part of your cessation plan, here’s how to approach it responsibly.

Choose Quality Products

• Look for third-party lab testing. Reputable brands provide Certificates of Analysis (COAs) from independent labs. These verify CBD content and test for contaminants. If a company doesn’t provide COAs, don’t buy their product.
• Choose products made from U.S.-grown hemp. U.S. hemp is subject to more regulatory oversight than imported hemp.
• Look for “full-spectrum” or “broad-spectrum” rather than “isolate.” Full-spectrum products contain other cannabinoids and terpenes that may enhance CBD’s effects (the “entourage effect”), though isolate is an option if you need to avoid all THC.
• Avoid outrageous health claims. Any CBD product claiming to “cure” addiction, cancer, or any disease is marketing, not science. Responsible companies describe their products accurately.

Routes of Administration

• Oral (oils, tinctures, capsules): Slowest onset (30-90 minutes) but longest duration (4-6 hours). Bioavailability is relatively low (6-19%) but consistent.
• Sublingual (held under the tongue): Faster onset than swallowed CBD (15-30 minutes). Better absorption through the mucous membranes.
• Inhalation (vaporized CBD): Fastest onset (minutes), highest bioavailability (up to 50%). However, inhaling anything raises its own health questions, and if you’re quitting smoking, replacing one inhalation habit with another is worth scrutinizing.
• Edibles (gummies, chocolates): Convenient but variable absorption. The oral fixation component might be useful.

Dosing Considerations

There’s no established dose for smoking cessation. General CBD research suggests:

• Low dose: 10-25mg per day
• Moderate dose: 25-75mg per day
• High dose: 75-200mg per day (the 2018 study used 800mg, which is well above typical consumer dosing)

Start low, increase gradually, and pay attention to how you feel. CBD is generally well-tolerated, but side effects can include drowsiness, dry mouth, diarrhea, and appetite changes.

Important Precautions

• Talk to your doctor first if you take any prescription medications. CBD can interact with blood thinners, certain antidepressants, anti-seizure medications, and others.
• Don’t use CBD as a replacement for proven cessation methods. Think of it as a potential complement to NRT, medication, counseling, or behavioral strategies — not a substitute.
• Be aware of legal nuances. CBD derived from hemp (less than 0.3% THC) is legal under federal law, but some states have restrictions. Know your local laws.
• If you’re pregnant or breastfeeding: The FDA advises against using CBD. There is insufficient safety data.
• Drug testing: Some CBD products contain trace amounts of THC that could potentially cause a positive drug test. If workplace testing is a concern, use CBD isolate products and verify THC content via the COA.

CBD vs. Proven Cessation Methods: Perspective

Let’s put this in context.

NRT (patches, gum, lozenges): Decades of research, proven to roughly double quit rates, FDA-approved, well-understood side effects.

Varenicline (Chantix): Extensive clinical trial data, roughly triples quit rates compared to placebo, FDA-approved.

Bupropion (Zyban): Decades of use, roughly doubles quit rates, FDA-approved for both depression and cessation.

Behavioral counseling: Strong evidence base, most effective when combined with medication.

CBD: A handful of small studies, promising but unconfirmed, no established dosing, no FDA approval for this use, highly variable product quality.

The evidence gap is significant. This doesn’t mean CBD is worthless — it means we’re comparing a well-established toolkit with a hypothesis that’s still being tested.

If you’re serious about quitting, use the proven methods as your foundation. If you want to add CBD as a supplementary tool, that’s a reasonable choice — just don’t bet everything on it.

What the Future Might Look Like

Research into CBD for substance use disorders is accelerating. Larger clinical trials are in progress or being planned. The National Institute on Drug Abuse (NIDA) has expressed interest in cannabinoid-based approaches to addiction treatment.

If the early results hold up in larger studies, CBD could eventually become part of the standard cessation toolkit — likely as an adjunct to behavioral therapy, similar to how exercise is recommended alongside medication. It’s unlikely to replace NRT or prescription medications, but it could fill a niche: a widely available, generally well-tolerated tool that reduces anxiety and disrupts automatic smoking behaviors.

That’s a genuine possibility. It’s not a certainty.

The Bottom Line

CBD for smoking cessation is a “maybe” — a scientifically interesting, pharmacologically plausible, but as yet unproven approach. The 2013 pilot study showing a 40% reduction in cigarette consumption is genuinely compelling. The 2018 attentional bias research adds a plausible mechanism. But “compelling” and “proven” are different words for a reason.

If you want to try CBD as part of your quit strategy:

• Use it alongside proven methods, not instead of them
• Choose high-quality, third-party tested products
• Start with a low dose and adjust
• Tell your doctor, especially if you take other medications
• Don’t expect a magic bullet

There are no magic bullets for nicotine addiction. But there are tools, strategies, supports, and — sometimes — substances that take the edge off just enough to let your willpower do its work. If CBD turns out to be one of those tools, that’s worth knowing about.

The most important thing isn’t which method you use. It’s that you try.

Sources and Further Reading

• Morgan CJA et al., “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)
• Blessing EM et al., “Cannabidiol as a Potential Treatment for Anxiety Disorders,” Neuropsychopharmacology (2015)
• Prud’homme M et al., “Cannabidiol as an Intervention for Addictive Behaviors: A Systematic Review of the Evidence,” Substance Abuse: Research and Treatment (2015)
• FDA — What You Need to Know About CBD Products
• National Institute on Drug Abuse (NIDA) — Marijuana Research
• National Quitline: 1-800-QUIT-NOW (1-800-784-8669)