Ayahuasca, dimethyltryptamine, and psychosis: a systematic review of human studies
Therapeutic Advances in Psychopharmacology – February 23, 2017
Source: OpenAlex
Summary
Psychotic episodes linked to the hallucinogen Ayahuasca are remarkably rare, even outside controlled settings. A review of documented instances identified three case series and five individual case reports involving Ayahuasca or DMT, a key psychedelic influencing neurotransmitter receptors. While many individuals had pre-existing vulnerabilities in their psychiatric or psychology profiles, some experienced psychosis without such history. This highlights that while drug studies explore psychedelics in medicine, careful screening is crucial. Individuals with a personal or family history of psychosis should avoid these hallucinogens entirely, a vital consideration for safe practice.
Abstract
Ayahuasca is a hallucinogen brew traditionally used for ritual and therapeutic purposes in Northwestern Amazon. It is rich in the tryptamine hallucinogens dimethyltryptamine (DMT), which acts as a serotonin 5-HT 2A agonist. This mechanism of action is similar to other compounds such as lysergic acid diethylamide (LSD) and psilocybin. The controlled use of LSD and psilocybin in experimental settings is associated with a low incidence of psychotic episodes, and population studies corroborate these findings. Both the controlled use of DMT in experimental settings and the use of ayahuasca in experimental and ritual settings are not usually associated with psychotic episodes, but little is known regarding ayahuasca or DMT use outside these controlled contexts. Thus, we performed a systematic review of the published case reports describing psychotic episodes associated with ayahuasca and DMT intake. We found three case series and two case reports describing psychotic episodes associated with ayahuasca intake, and three case reports describing psychotic episodes associated with DMT. Several reports describe subjects with a personal and possibly a family history of psychosis (including schizophrenia, schizophreniform disorders, psychotic mania, psychotic depression), nonpsychotic mania, or concomitant use of other drugs. However, some cases also described psychotic episodes in subjects without these previous characteristics. Overall, the incidence of such episodes appears to be rare in both the ritual and the recreational/noncontrolled settings. Performance of a psychiatric screening before administration of these drugs, and other hallucinogens, in controlled settings seems to significantly reduce the possibility of adverse reactions with psychotic symptomatology. Individuals with a personal or family history of any psychotic illness or nonpsychotic mania should avoid hallucinogen intake.