Therapeutic effects of classic serotonergic psychedelics: A systematic review of modern‐era clinical studies
Acta Psychiatrica Scandinavica – October 30, 2020
Source: OpenAlex
Summary
Serotonergic hallucinogens like psilocybin show remarkable promise, offering 188 patients long-lasting relief from anxiety and major depressive disorder after just 1-3 sessions. This burgeoning field of clinical psychology and medicine, grounded in careful psychedelics and drug studies, reviewed 16 papers. It confirms these compounds, influencing neurotransmitter receptors, are safe, reporting no severe adverse effects. Psychiatry is exploring these naturally derived or chemically synthesized agents as powerful new tools for psychotherapists, addressing significant unmet needs in mental health.
Abstract
Abstract Objective To conduct a systematic review of modern‐era (post‐millennium) clinical studies assessing the therapeutic effects of serotonergic psychedelics drugs for mental health conditions. Although the main focus was on efficacy and safety, study characteristics, duration of antidepressants effects across studies, and the role of the subjective drug experiences were also reviewed and presented. Method A systematic literature search (1 Jan 2000 to 1 May 2020) was conducted in PubMed and PsychINFO for studies of patients undergoing treatment with a serotonergic psychedelic. Results Data from 16 papers, representing 10 independent psychedelic‐assisted therapy trials (psilocybin = 7, ayahuasca = 2, LSD = 1), were extracted, presented in figures and tables, and narratively synthesized and discussed. Across these studies, a total of 188 patients suffering either cancer‐ or illness‐related anxiety and depression disorders (C/I‐RADD), major depressive disorder (MDD), obsessive‐compulsive disorder (OCD) or substance use disorder (SUD) were included. The reviewed studies established feasibility and evidence of safety, alongside promising early data of efficacy in the treatment of depression, anxiety, OCD, and tobacco and alcohol use disorders. For a majority of patients, the therapeutic effects appeared to be long‐lasting (weeks‐months) after only 1 to 3 treatment session(s). All studies were conducted in line with guidelines for the safe conduct of psychedelic therapy, and no severe adverse events were reported. Conclusion The resurrection of clinical psychedelic research provides early evidence for treatment efficacy and safety for a range of psychiatric conditions, and constitutes an exciting new treatment avenue in a health area with major unmet needs.