Exploring the Therapeutic Potential of Psilocybin: A Comprehensive Review of Clinical Trial Evidence and Implications for Rescheduling.

Authors

Fatemeh Abolhasani, Hojjat Rezaiezadeh, Mohammad Amin Langarizadeh, Marziye Ranjbar Tavakoli, Mehran Ilaghi, Parnian Zare, Faezeh Karbakhsh Ravari, Fatemeh Alamdar, Mohammad Banazadeh, Mohammad Shabani

Published in

Mini reviews in medicinal chemistry. Sep 18, 2026. Epub Sep 18, 2026.

Abstract

Psilocybin, a compound found in certain species of Psilocybe mushrooms, shows potential as a treatment for various psychiatric conditions. In the past decade, a growing body of evidence has shown the effectiveness of psilocybin in treating conditions, such as treatment-resistant depression, generalized anxiety disorder, post-traumatic stress disorder, and substance use disorders. This review provides a thorough overview of clinical and neurobiological studies investigating psilocybin's biological pathways and therapeutic outcomes. Psilocybin primarily acts as a serotonin 2A receptor agonist, modulating cortical and limbic networks involved in emotional regulation, neural plasticity, and cognitive flexibility. Controlled clinical trials have demonstrated that psilocybin, when administered under structured psychotherapeutic supervision, leads to significant changes in perception and self-awareness, resulting in lasting improvements in mood, emotional well-being, and overall quality of life. Reported side effects are generally mild and self-limiting, such as nausea, nervousness, and headaches, indicating a favorable safety profile. However, further research remains essential to optimize dosing protocols, assess long-term safety and effectiveness, and explore its broader clinical applicability. Additionally, if psilocybin were to be reclassified from a Schedule I substance, pending adequate regulatory approval and strong scientific evidence, it could represent a significant shift in psychiatric treatment, offering an innovative, mechanism-based therapeutic option for individuals who do not respond adequately to standard drug therapies.

PMID:
42770437
Bibliographic data and abstract were imported from PubMed on 22 Sep 2026.

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