Examining the pharmacokinetic and pharmacodynamic interaction of N,N-dimethyltryptamine and harmine in healthy volunteers: Α factorial dose-escalation study.
Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie March 1, 2025 Klemens Egger, Javier Jareño Redondo, Jovin Müller et al. 14 citations
Ayahuasca contains DMT and harmine, but their interactions are not fully understood. In a single-blind, randomized, two-arm, factorial dose-finding study with 16 healthy participants, each received six dose combinations of DMT (0-120 mg) and harmine (0-180 mg) via a transmucosal delivery system. All combinations produced dose-dependent subjective effects lasting 4-5 hours, with peak DMT and harmine levels reaching 33 ng/mL and 49 ng/mL, respectively. The interaction was bidirectional: harmine reduced DMT metabolism, while DMT altered harmine pharmacokinetics. The formulation had a favorable safety profile, supporting further testing for affective disorders.