Out of control: Blinding, dose response, and psychosocial controls in psychedelic trials
Sandeep M. Nayak, Zarmeen Zahid
Journal of Psychopharmacology September 1, 2025 DOI: 10.1177/02698811251368367 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Commentary Placebo-controlled Peer reviewed |
|---|---|
| Keywords | Blinding Psychosocial Ambiguity Nocebo Expectancy theory Research design Psychotherapist Clinical trial Cognitive psychology Placebo Alternative medicine |
| Citations | 5 |
| Key points | Argues that traditional placebo-controlled designs are inadequate for psychedelic trials due to failed blinding, and recommends alternative designs such as dose-response comparisons and unblinded comparative efficacy studies. |
Abstract
As psychedelic clinical trials expand in scale and influence, foundational challenges in trial design have come into sharper focus. In this commentary, we examine three interrelated issues: 1) the failure of blinding in psychedelic trials, 2) the potential of alternate controls including dose-response designs as an empirical workaround, and 3) the persistent ambiguity surrounding psychosocial control conditions. We argue that efforts to preserve traditional placebo-controlled frameworks are often inadequate due to the unmistakable subjective effects of psychedelics and the therapeutic relevance of those effects themselves. Instead, we highlight alternative designs including graded dose comparisons and unblinded comparative efficacy studies as pragmatic paths forward. Finally, we outline a proposal for empirically isolating the role of psychotherapy in psychedelic treatment, emphasizing the need for operational definitions, fidelity monitoring, and careful risk mitigation. These issues are unlikely to be resolved by any single design; rather, progress will require triangulating evidence across multiple imperfect but complementary methodologies.