In brief
- A meta-analysis published in the Journal of Psychopharmacology compiles eight studies on DMT therapy for substance misuse.
- Pre-post changes are observed without established causal efficacy. With-versus-without psychotherapy comparisons are exploratory and differ between abstract and body.
- 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 published a systematic review and meta-analysis in Journal of Psychopharmacology on April 12, 2026. It pools heterogeneous interventions, mainly ayahuasca and one study of 5-MeO-DMT given after ibogaine, not uniform trials of isolated DMT. It examines associations with problematic use in contexts involving DMT and ayahuasca; the contribution of each compound, support or context is not isolated.
What they found
The publication pools eight studies in seven reports: 456 initial participants and 287 assessed afterward (37% attrition), mean age 36.6 and 79% men. Pooled pre-post change was g=0.94 (95% CI 0.56–1.31), with g=1.35 for other drugs and 0.65 for alcohol; not a randomized difference against placebo. The source itself differs on psychotherapy: the abstract reports g=1.38 and subgroup p=0.0121, while the body reports g=1.28 and p=0.0287; both report g=0.60 without psychotherapy. This discrepancy is unresolved and between-study comparisons do not prove that adding psychotherapy causes or doubles benefit. These values must not be transferred to psilocybin.
What it means
The designs are observational and three include comparison groups; they are not randomized efficacy trials. High bias, differing measures, substantial attrition and I²=96.9% heterogeneity limit interpretation. The first follow-up is pooled, not a uniform duration of benefit. The study using 5-MeO-DMT after ibogaine cannot separate the compounds’ effects; ceremonial or therapeutic contexts do not by themselves isolate drug, expectancy and support. Controlled designs and replication are needed; these findings validate neither treatment, safety nor consumption recommendations.
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.
