# Psychedelics as a Therapeutic Opportunity or Threat: A Narrative Review

## TL;DR

This review explores how classic psychedelics and MDMA may help treat mental health issues like depression and PTSD, while highlighting the need for caution and further research.

## Contribution

The paper provides a comprehensive narrative review of the therapeutic potential and risks of psychedelics in psychiatric treatment.

## Key findings

- Psychedelics may reduce depressive symptoms and show promise in treating addiction and PTSD.
- MDMA combined with psychotherapy has substantial therapeutic potential for PTSD.
- Use of psychedelics requires caution due to risks of adverse reactions and drug interactions.

## Abstract

Classic psychedelics and related substances, such as 3,4-methylenedioxymethamphetamine (MDMA), have again become a focus of interest in psychiatry as potential therapeutic tools. The aim of this paper is to review current data on their mechanisms of action, clinical applications in the treatment of mood and anxiety disorders, addictions and post-traumatic stress disorder (PTSD), as well as to assess safety, drug interactions and long-term complications. Studies indicate that psychedelics act mainly through stimulation of 5-hydroxytryptamine 2A (5-HT2A) receptors, induction of neuroplastic changes and modification of functional brain networks, which may facilitate changes in entrenched cognitive and emotional patterns. Randomized clinical trials with psilocybin have shown a rapid and sustained reduction of depressive symptoms, including in populations with treatment-resistant depression and cancer patients, as well as promising results in the treatment of alcohol use disorders. MDMA, when combined with psychotherapy, has demonstrated substantial therapeutic potential in the treatment of PTSD. The literature indicates that particular caution is required when using these substances in therapy because of the risk of acute and chronic adverse reactions and potential drug interactions, including with serotonergic agents and monoamine oxidase inhibitors (MAOIs). The available findings confirm a substantial, though still only partly explored, therapeutic potential of classic psychedelics and MDMA. At the same time, they emphasize the need for strict control of “set and setting”, careful patient selection, further multicentre studies with greater statistical power and longer follow-up before these interventions can be incorporated into routine clinical practice.