Ayahuasca, psychoactive concoction prepared from the Amazonian vine Banisteriopsis caapi
The Mature Inner Bark of this species contains the compound NN-Dimethyltryptamine (0.4%) and other substituted Tryptamines that are components of the South American visionary medicine Ayahuasca.
Peganum Harmala contains Harmaline, which is a strong MAO-inhibitor, and it is therefore often used as a 1st component in Ayahuasca ceremonies in order to inhibit the metabolisation of an orally-administered DMT molecule (2nd component).
Classical or serotonergic psychedelics (agonists for the LSD (also known as "acid"), psilocin (the active constituent of psilocybin mushrooms, commonly known as "magic mushrooms" or "shrooms"), mescaline (the active constituent of peyote), and DMT (the active constituent of ayahuasca and potentially an endogenous psychedelic compound).