N-Dimethyltryptamine is a substituted tryptamine that occurs in many plants and animals, including humans, and which is both a derivative and a structural analog of tryptamine. DMT is used as a psychedelic drug and prepared by various cultures for ritual purposes as an entheogen Dimethyltryptamine (DMT) is a compound found in various plants and animals that's used as a mind-altering drug. In large enough doses, DMT can give you a "high" and distort your senses so that you see or feel things that aren’t really there. Other names for DMT are Dimitri, businessman’s special, the spirit molecule, and elf spice.