CBD & Alcohol Use Disorder: When the Trials Said No
Published: Alcohol: Clinical and Experimental Research, January 2026
Researchers: Bogenschutz, Blessing et al. — two simultaneous randomized proof-of-concept trials
1. What Was Studied?
Alcohol use disorder (AUD) is one of the most common and difficult-to-treat substance use conditions globally. CBD has attracted attention as a potential treatment because animal studies have consistently shown it reduces alcohol-seeking behaviour and withdrawal symptoms — and because it lacks the abuse potential of many existing AUD medications.
These two simultaneous randomized controlled trials tested CBD for alcohol use disorder — one in people with AUD alone, one in people with AUD and co-occurring PTSD. In Study 1, 27 adults with moderate to severe AUD received either 600mg/day CBD for four weeks followed by 1200mg/day, or placebo. Study 2 followed a similar design in people with both conditions.
2. What Did They Find?
CBD was well tolerated in both trials — no serious adverse events related to CBD were reported
CBD did not significantly reduce alcohol consumption compared to placebo in either trial
CBD did not outperform placebo on measures of alcohol craving
Withdrawal symptoms and other secondary outcomes also did not show meaningful differences between CBD and placebo groups
The researchers concluded: tolerability was confirmed, but there was no evidence of efficacy for reducing drinking
3. What This Means
Publishing trials with negative results is as important as publishing positive ones — and Ask Mary Jane covers both for exactly this reason.
CBD's promise for alcohol use disorder has been built primarily on animal studies, where the signal is consistent and strong. These two human trials are a reminder that animal research does not always translate. The doses used here were high — 600 to 1200mg per day — meaning under-dosing is unlikely to explain the null result.
CBD appears safe for people with AUD, which is meaningful given the overlap with liver concerns and medication interactions in this population. But safety is not efficacy, and this research provides an important reality check.
4. What This Does NOT Mean
These were proof-of-concept trials with small sample sizes — larger trials may still find a signal
A null result in two small trials does not close the question permanently
CBD may still have a role in other aspects of AUD management (anxiety, sleep, withdrawal) that these trials were not designed to detect
CBD being safe for people with AUD is still a useful finding
These results do not apply to other substances or other uses of CBD
5. Bottom Line
Two randomized trials of CBD for alcohol use disorder found it was well tolerated but showed no evidence of reducing alcohol consumption or craving — an important null result in an area where animal research had raised significant hopes.
🗣️ Mary Jane's Take
The science doesn't always go the way we hope. This is a case where animal studies pointed one direction and human trials went another. That doesn't mean the question is closed — but it means the honest answer right now is "we tried, it didn't work in these trials, and we need to understand why before moving forward."
