Journal of affective disorders · 2026
Psilocybin-assisted therapy for major depressive disorder: Perspective from meta-analysis.
СтатьяМетаанализСистематический обзорНазвание и аннотация: Перевод в очереди
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Kishi Taro, Sakuma Kenji, Hatano Masakazu, Uchida Hiroyuki, Iwata Nakao
Аннотация
OBJECTIVE: This systematic review and meta-analysis of six randomized controlled trials aimed to investigate the temporal changes in the efficacy and safety of psilocybin treatment for major depressive disorder (MDD).
METHODS: Separate meta-analyses were conducted for standard-dose psilocybin (25 mg/session, or 20-30 mg/70 kg/session) and low-dose psilocybin (10 mg/session or 15.05 mg/70 kg/session) subgroups. Control conditions included placebo, waiting-list control, niacin, or psilocybin 1 mg.
RESULTS: Standard-dose psilocybin was superior to control in reducing depressive symptoms (standardized mean difference [SMD]: -1.05; 95% confidence intervals [CIs]: -1.60 to -0.50, p = 0.0002, I2 = 75%, K = 4). Sensitivity analysis excluding studies with waiting-list controls supported the superiority of standard-dose psilocybin compared with control without considerable heterogeneity (SMD: -0.70; 95% CI: -1.03 to -0.36, p < 0.0001, I2 = 43%, K = 2). This sensitivity analysis included two double-blind trials that incorporated manualized psilocybin-assisted psychotherapy. Compared with controls, standard-dose psilocybin was associated with higher response (risk ratio [RR]: 2.34; 95% CI: 1.52-3.60, p = 0.0001, I2 = 0%) and remission rates at 2-3 weeks post-treatment (RR: 3.38; 95% CI: 1.88-6.08, p < 0.0001, I2 = 0%), with response rate at 6-12 weeks post-treatment (RR: 2.61; 95% CI: 1.45-4.71, p = 0.001, I2 = 0%). Moreover, standard-dose psilocybin was related to lower all-cause discontinuation compared with control (RR: 0.39; 95% CI: 0.18-0.87, p = 0.02, I2 = 0%). Standard-dose psilocybin was associated with a higher incidence of headache (RR: 2.06; 95% CI: 1.11-3.81, p = 0.02, I2 = 57%) and nausea within 1-9 days post-treatment (RR: 10.20; 95% CI: 3.80-27.39, p < 0.0001, I2 = 0%) compared with the control; however, these symptoms resolved after this period. Low-dose psilocybin demonstrated no superior efficacy compared with the control group.
CONCLUSIONS: This meta-analysis indicates that standard-dose psilocybin may represent a promising therapeutic option for MDD treatment. Nonetheless, future research should address the considerable methodological heterogeneity across current trials.
METHODS: Separate meta-analyses were conducted for standard-dose psilocybin (25 mg/session, or 20-30 mg/70 kg/session) and low-dose psilocybin (10 mg/session or 15.05 mg/70 kg/session) subgroups. Control conditions included placebo, waiting-list control, niacin, or psilocybin 1 mg.
RESULTS: Standard-dose psilocybin was superior to control in reducing depressive symptoms (standardized mean difference [SMD]: -1.05; 95% confidence intervals [CIs]: -1.60 to -0.50, p = 0.0002, I2 = 75%, K = 4). Sensitivity analysis excluding studies with waiting-list controls supported the superiority of standard-dose psilocybin compared with control without considerable heterogeneity (SMD: -0.70; 95% CI: -1.03 to -0.36, p < 0.0001, I2 = 43%, K = 2). This sensitivity analysis included two double-blind trials that incorporated manualized psilocybin-assisted psychotherapy. Compared with controls, standard-dose psilocybin was associated with higher response (risk ratio [RR]: 2.34; 95% CI: 1.52-3.60, p = 0.0001, I2 = 0%) and remission rates at 2-3 weeks post-treatment (RR: 3.38; 95% CI: 1.88-6.08, p < 0.0001, I2 = 0%), with response rate at 6-12 weeks post-treatment (RR: 2.61; 95% CI: 1.45-4.71, p = 0.001, I2 = 0%). Moreover, standard-dose psilocybin was related to lower all-cause discontinuation compared with control (RR: 0.39; 95% CI: 0.18-0.87, p = 0.02, I2 = 0%). Standard-dose psilocybin was associated with a higher incidence of headache (RR: 2.06; 95% CI: 1.11-3.81, p = 0.02, I2 = 57%) and nausea within 1-9 days post-treatment (RR: 10.20; 95% CI: 3.80-27.39, p < 0.0001, I2 = 0%) compared with the control; however, these symptoms resolved after this period. Low-dose psilocybin demonstrated no superior efficacy compared with the control group.
CONCLUSIONS: This meta-analysis indicates that standard-dose psilocybin may represent a promising therapeutic option for MDD treatment. Nonetheless, future research should address the considerable methodological heterogeneity across current trials.