Data availability
The living database used for this analysis can be accessed via Metapsy (docs.metapsy.org/databases/depression-psiloctr/) or via Zenodo (https://doi.org/10.5281/zenodo.15714852)70.
Code availability
Code for all analyses can be accessed on our website (sypres.io), or on our GitHub repository (https://github.com/PennLINC/sypres-docs) (release 26.0.0).
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Acknowledgements
This effort is supported by the Analgesic, Anesthetic, and Addiction Clinical Trial Translations, Innovations, Opportunities, and Networks and Pediatric Anesthesia Safety Initiative (ACTTION/PASI) public–private partnership with the US FDA. The views expressed in this article are those of the authors, and no endorsement by the FDA should be inferred. R.H.D. is director and chair of the ACTTION management committee, and T.D.S. obtained funding for this study via ACTTION. We thank J. Lege-Matsuura and K. McShea for their assistance with generating database search terms. We thank N. Sepeda, R. von Rotz, J. Rosenblat, N. Rieser, R. Carhart-Harris, B. Szigeti, D. Erritzoe, A. Luquiens, A. Inamdar and S. Kulikova for providing data or other clarifications on studies included in this review.
Ethics declarations
Competing interests
Over the past 3 years, E.C.S. has had grant funding to his institution from NIH; editing payments from Wolters–Kluwer; consulting fees from Eli Lilly and Company; medical devices supplied to his institution for his research by Masimo; and he has conducted medical–legal consultations. He also has served on the board of directors (unpaid) for a treatment program, Ashley Addiction Treatment. S.M.N. is a co-investigator on a Usona Institute sponsored trial of psilocybin for major depressive disorder. R.H.D. is the director and chair of the ACTTION management committee that funded this study and, since 1 January 2021, has received research grants and contracts from the US FDA and the US NIH, and compensation for serving on advisory boards or consulting on clinical trial methods from Acadia, Akigai, Allay, AM-Pharma, Analgesic Solutions, Beckley, Biogen, Biosplice, Bsense, Cardialen, Chiesi, Clexio, Collegium, CombiGene, Confo, Contineum, Eccogene, Editas, Eli Lilly, Emmes, Endo, Epizon, Ethismos (equity), Exicure, GlaxoSmithKline, Glenmark, Gloriana, JucaBio, Kriya, Mainstay, Merck, Mind Medicine (also equity), NeuroBo, Noema, OliPass, Orion, Oxford Cannabinoid Technologies, Pfizer, Q-State, Regenacy (also equity), Rho, Salvia, Sangamo, Semnur, SIMR Biotech, Sinfonia, SK Biopharmaceuticals, Sparian, SPM Therapeutics, SPRIM Health, Tiefenbacher, Validae, Vertex, Viscera and WCG. The other authors declare no competing interests.
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Nature Mental Health thanks Joshua Black, Yan Liu and Richard J. Zeifman for their contribution to the peer review of this work. Peer reviewer reports are available.
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Singleton, S.P., Sevchik, B.L., Lahey, A. et al. A living systematic review, meta-analysis and open-data resource of randomized controlled trials of psilocybin treatment for symptoms of depression. Nat. Mental Health (2026). https://doi.org/10.1038/s44220-026-00630-8
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DOI: https://doi.org/10.1038/s44220-026-00630-8

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