Cited by 88Psychedelics and Drug StudiesTreatment of Major DepressionReligion, Spirituality, and Psychology

Psilocybin-assisted therapy for depression: A systematic review and dose-response meta-analysis of human studies

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Perez, Natacha, Langlest, Florent, Mallet, Luc, De Pieri, Marco, Sentissi, Othman, Thorens, Gabriel, Seragnoli, Federico, Zullino, Daniele +4 more·2023·European Neuropsychopharmacology

Abstract

Psilocybin is increasingly studied for its antidepressant effect, but its optimal dosage for depression remains unclear. We conducted a systematic review and a dose-response meta-analysis to find the optimal dosage of psilocybin to reduce depression scores. Following our protocol (CRD 42022220190) multiple electronic databases were searched from their inception until February 2023, to identify double-blind randomized placebo-controlled (RCTs) fixed-dose trials evaluating the use of psilocybin for adult patients with primary or secondary depression. A one-stage dose-response meta-analysis with restricted cubic splines was used. Cochrane risk of bias was used to assess risk of bias. Our analysis included seven studies with a total of 489 participants. Among these, four studies focused on primary depression (N = 366), including one study with patients suffering from treatment-resistant depression. The remaining three studies examined secondary depression (N = 123). The determined 95% effective doses per day (ED95) were 8.92, 24.68, and 36.08 mg/70 kg for patients with secondary depression, primary depression, and both subgroups, respectively. We observed significant dose-response associations for all curves, each plateauing at different levels, except for the bell-shaped curve observed in the case of secondary depression. Additionally, we found significant dose-response associations for various side effects, including physical discomfort, blood pressure increase, nausea/vomiting, headache/migraine, and the risk of prolonged psychosis. In conclusion, we discovered specific ED95 values for different populations, indicating higher ED95 values for treatment-resistant depression, primary depression, and secondary depression groups. Further RCTs are necessary for each population to determine the optimal dosage, allowing for maximum efficacy while minimizing side effects.

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Crossref · 10.1016/j.euroneuro.2023.07.011

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Authors
Perez, N., Langlest, F., Mallet, L., De Pieri, M., Sentissi, O., Thorens, G., Seragnoli, F., Zullino, D., Kirschner, M., Kaiser, S., Solmi, M., & Sabé, M.
Affiliations
  • University Hospital of Geneva (CH)
  • University of Geneva (CH)
  • University of Zurich (CH)
  • University of Ottawa (CA)
Corresponding author
Sabé, Michel
Venue
European Neuropsychopharmacology
Publisher
Elsevier BV
Published
2023-11
Volume
76
Pages
61-76
ISSN
0924-977X (ISSN-L)
OpenAlex
W4385628167
Cited by
88
References
58
Citations by year
2026: 22 · 2025: 31 · 2024: 29 · 2023: 6
FWCI
4.50
Type
journal article
Language
en
Open access
Locations
  • European Neuropsychopharmacology (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • IRIS (submittedVersion)
  • SERVAL (Université de Lausanne) (submittedVersion)
Topics
  • Social Sciences › Psychology › Clinical Psychology › Psychedelics and Drug Studies
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Social Sciences › Health › Religion, Spirituality, and Psychology
Keywords
psilocybin, depression, dose-response relationship, antidepressant effects, treatment-resistant depression, secondary depression, effective dose, adverse effects, psychosis risk, psychedelics
MeSH terms
Adult, Antidepressive Agents, Depression, Humans, Psilocybin, Psychotic Disorders, Randomized Controlled Trials as Topic

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