Real-world effectiveness and safety of psychedelic-assisted psychotherapy: Outcomes from a large-scale compassionate use cohort in Switzerland

Feb 5, 2026Psychiatry research

Effectiveness and safety of psychedelic-assisted therapy in real-world use: Results from a large compassionate use group in Switzerland

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Abstract

A total of 115 patients with treatment-resistant depressive and/or anxiety disorders showed significant improvements in symptoms after a first session of psychedelic-assisted psychotherapy.

  • Depressive symptoms decreased significantly, with a strong statistical effect (BDI: F(2178) = 63.50, p < 0.001).
  • Anxiety symptoms also showed significant reduction (STAI-T: F(1.74,145.9) = 16.97, p < 0.001).
  • Cognitive emotion regulation analysis indicated reduced self-blame, rumination, and catastrophizing, alongside increased positive emotional strategies.
  • Participants experienced distinct temporal profiles for the perceived intensity of LSD and psilocybin, but overall subjective effects were comparable.
  • Adverse events reported were mostly mild and transient, with no serious complications or treatment discontinuations noted.

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