Antidepressant Effects of Ayahuasca: a Randomized Placebo Controlled Trial in Treatment Resistant Depression
Abstract
The purpose of the present trial is to test the efficacy of Ayahuasca in treatment-resistant depression. Ayahuasca is a decoction of two plants, long used by Amazonian Amerindians. Traditionally, it is prepared by decoction of a bush (Psychotria viridis) with a liana (Banisteriopsis caapi). P. viridis is a rich source of N,N-dimethyltryptamine (DMT), a serotonergic agonist, and B. caapi contains potent monoamine oxidase-A inhibitors (MAOi-A), such as harmine, harmaline. The study is designed as a randomized placebo controlled trial with two parallel arms, and it will also evaluate changes of different biomarkers of depression including anatomical and functional Magnetic Resonance Imaging (MRI), serum levels of BDNF, TNF-a, cortisol, IL-6, and IL-10, polysomnography, neuropsychological, psychiatric scales and questionnaires.
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