However, the current investigators note that they implemented measures to ensure safety, including careful medical and psychiatric screening, therapy, and monitoring that was provided by well-trained therapists, including a licensed psychiatrist. In addition, medications were available to treat acute psychiatric reactions.
A cited limitation of the study was that blinding was not maintained because the average intensity of experience with psilocybin was high, whereas it was low with diphenhydramine.
This difference undermined the masking of treatment such that more than 90% of participants and therapists correctly guessed the treatment assignment.
Another limitation was that objective measures to validate self-reported drinking outcomes were available for only 54% of study participants.
Despite these limitations, the study builds on earlier work by the NYU team that showed that two doses of psilocybin taken over a period of 8 weeks significantly reduced alcohol use and cravings in patients with AUD.
“We’re very encouraged by these findings and hopeful about where they could lead. Personally, it’s been very meaningful and rewarding for me to do this work and inspiring to witness the remarkable recoveries that some of our participants have experienced,” Dr. Bogenschutz told briefing attendees.
Urgent need
The authors of an accompanying editorial note that novel medications for alcohol dependence are “sorely needed. Recent renewed interest in the potential of hallucinogens for treating psychiatric disorders, including AUD, represents a potential move in that direction.”
Henry Kranzler, MD, and Emily Hartwell, PhD, both with the Center for Studies of Addiction, University of Pennsylvania, Philadelphia, write that the new findings “underscore the potential of developing psilocybin as an addition to the alcohol treatment pharmacopeia.”
They question, however, the feasibility of using hallucinogens in routine clinical practice because intensive psychotherapy, such as that provided in this study, requires a significant investment of time and labor.
“Such concomitant therapy, if necessary to realize the therapeutic benefits of psilocybin for treating AUD, could limit its uptake by clinicians,” Dr. Kranzler and Dr. Hartwell write.
The study was funded by the Heffter Research Institute and by individual donations from Carey and Claudia Turnbull, Dr. Efrem Nulman, Rodrigo Niño, and Cody Swift. Dr. Bogenschutz reports having received research funds from and serving as a consultant to Mind Medicine, the Multidisciplinary Association for Psychedelic Studies, B. More, AJNA Labs, Beckley Psytech, Journey Colab, and Bright Minds Biosciences. Dr. Kranzler and Dr. Hartwell have reported no relevant financial relationships.
A version of this article first appeared on Medscape.com.