Joshua S. Siegel, MD PhD

Center for Psychedelic Medicine, Department of Psychiatry, NYU Grossman School of Medicine, New York, New York; Nathan S. Kline Institute for Psychiatric Research, Orangeburg, New York

JCP
Hallucinogen–Psychosis Associations Are Confounded by Baseline Psychiatric History
Original Research ▶ Video

June 10, 2026

Apparent associations between hallucinogen use and psychosis appear largely attributable to baseline psychiatric comorbidities rather than direct causal effects.
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JCP
Psychedelic Therapies: One Drug, Multiple Treatments: Reply to Modesto-Lowe et al
Letter to the Editor

September 1, 2025

The authors reply to a letter by Modesto-Lowe et al regarding their survey of psychedelic practitioners’ views on psychological support.
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JCP
Psychological Support in Psychedelic Therapy
Original Research

February 5, 2025

The survey reveals differences of opinion among psychedelic researchers, with a slight trend toward preference for an emotive approach to psychological support.
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