PLoS ONE
September 30, 2015
Eduardo Ekman Schenberg, João Felipe Morel Alexandre, Renato Filev et al.
115 citations
Ayahuasca, an Amazonian plant-based brew used ritually in Brazil and increasingly worldwide, produces a two-phase brain effect. Electroencephalogram recordings and blood measurements of the brew's compounds (DMT, harmine, harmaline, tetrahydroharmine, and their metabolites) showed that 50 minutes after ingestion, alpha brainwave power (8–13 Hz) decreased, mostly in the left parieto-occipital cortex. Between 75 and 125 minutes, slow- and fast-gamma power (30–50 and 50–100 Hz, respectively) increased across multiple cortical regions, including left centro-parieto-occipital, left fronto-temporal, and right frontal areas. These brain changes were significantly linked to circulating levels of ayahuasca's active chemicals. The authors interpret these effects within cognitive and emotional frameworks relevant to ritual use and potential therapeutic applications.
Journal of Psychedelic Studies
August 29, 2017
Eduardo Ekman Schenberg, Maria Angélica de Castro Comis, João Felipe Morel Alexandre et al.
39 citations
Patients with substance-related disorders who received ibogaine in a treatment program reported intense physical discomfort and a psychologically challenging experience, along with heightened memory retrieval—especially about past drug use—and vivid, dreamlike visions. The experience shared some features with other psychedelics but also differed markedly. The authors propose that ibogaine's subjective effects may function as simulations of threat and danger, drawing on an evolutionary theory of dreaming.
Journal of Psychedelic Studies
April 1, 2017
Eduardo Ekman Schenberg, Maria Angélica de Castro Comis, João Felipe Morel Alexandre et al.
29 citations
A treatment combining the psychedelic alkaloid ibogaine with cognitive-behavioral therapy led to improvements in craving, personal relationships, quality of life, and self-efficacy among people with substance use disorders, including cocaine dependence. These secondary outcomes were assessed through semi-structured interviews and qualitative content analysis. The findings support the therapeutic potential of ibogaine-assisted psychotherapy for treating substance use disorders, particularly for psychostimulants like cocaine and crack cocaine, for which effective treatments are lacking.