In a double-blind, placebo-controlled study over a 3-day meditation retreat, 40 experienced meditators received either DMT-harmine or a placebo. Those who took DMT-harmine reported greater mystical-type experiences, non-dual awareness, and emotional breakthrough during the acute substance effects, and greater psychological insight one day later after adjusting for baseline differences. Mindfulness and compassion did not differ significantly between groups. At one-month follow-up, the DMT-harmine group rated their experience as more personally meaningful, spiritually significant, and well-being-enhancing than the placebo group. The findings suggest specific synergistic effects of DMT-harmine during meditation.
The acute subjective effects of psychedelics are thought to be key to their therapeutic benefits, but conventional measurement methods may be biased. Using natural language processing to analyze phenomenological interviews from a randomized trial of DMT/harmine versus placebo during meditation in experienced meditators, the study found that meditation under DMT/harmine produced different thematic content and greater experiential diversity than meditation under placebo, though semantic overlap existed. The analysis detected well-known primary effects and subtle language patterns, including frequent use of Buddhist concepts and spiritual jargon regardless of condition. Findings suggest shared features between meditative and psychedelic states, a strong drug-context interconnection, and potential synergistic effects.