In brief
- A meta-analysis published in the Journal of Psychopharmacology compiles eight studies on DMT therapy for substance misuse.
- The findings point to a large effect on reducing substance use, particularly when the DMT session is paired with psychotherapeutic support.
- The authors emphasize that the evidence remains preliminary: the analyzed studies carry a high risk of bias and marked statistical heterogeneity.
A team led by Lisa M. Wallace has published the first systematic review and meta-analysis focused specifically on DMT (N,N-dimethyltryptamine) as a potential therapeutic tool for problematic alcohol and drug use in the Journal of Psychopharmacology. The paper does not present a new clinical trial; instead, it synthesizes what had previously been a handful of scattered studies published between 2010 and 2024 to answer a straightforward question: is there solid evidence that experiences with DMT and ayahuasca help reduce substance use?
What they found
The review includes eight studies (drawn from seven publications) comprising 456 participants evaluated at baseline, 287 of whom completed the post-treatment assessment—a 37% attrition rate that the authors identify as a notable limitation. The pooled sample was predominantly male (79%) with an average age of 36.6 years, spanning the use of alcohol, cocaine, cannabis, opioids, amphetamines, and sedatives. The overall effect on reducing substance use was large (Hedges’ g = 0.94), with a clear divergence depending on the substance: the effect was substantially stronger for illicit drugs other than alcohol (g = 1.35) than for alcohol alone (g = 0.65). The finding highlighted most by the researchers is the role of psychological support: when the DMT session was accompanied by structured psychotherapy, the effect nearly doubled (g = 1.28) compared to sessions without that support (g = 0.60), echoing observations already reported with other psychedelics like psilocybin.
What it means
These figures should be interpreted with caution, as the authors themselves point out. The eight included studies are largely observational, lacking control groups or blinding, relying on self-reported substance use data, and displaying extreme statistical heterogeneity (I² = 96.9%). This indicates that outcomes varied considerably from one study to another, meaning that pooling them into a single number serves as an exploratory estimate rather than definitive proof. There is also insufficient data on the long-term durability of these effects or what occurs outside controlled clinical or ceremonial settings. That said, the review offers something valuable: for the first time, it systematically demonstrates that a signal exists in the expected direction, and that the therapeutic framework—not just the compound itself—appears decisive in shaping outcomes. It is precisely the kind of preliminary finding that warrants rigorous randomized controlled trials, which the authors explicitly call for. From a harm reduction standpoint, this research changes little for those already attending ceremonies or using these substances on their own, but it helps clarify what the current evidence actually shows and which questions remain unanswered.
Source
- Wallace, L.M. et al. Efficacy of N,N-dimethyltryptamine (DMT) psychedelic therapy for substance misuse: A systematic review and meta-analysis. Journal of Psychopharmacology, April 2026.
Educational content written from a harm reduction perspective and with respect for individual freedom. It is not a substitute for advice from a healthcare professional and is not intended to encourage or condemn any drug use.
