As the U.S. Food and Drug Administration (FDA) edges closer to potentially approving psilocybin—an active compound in “magic mushrooms”—for the treatment of depression, a groundbreaking study highlights the potential impact this therapy could have. A forthcoming peer-reviewed study from Emory University, the University of Wisconsin-Madison, and UC Berkeley, set to be published in Psychedelics on September 24, 2024, explores the anticipated demand for psilocybin-assisted therapy in the United States.
The study, which combines national depression prevalence data with eligibility criteria from recent clinical trials, estimates that between 56% and 62% of patients currently receiving treatment for depression—equivalent to approximately 5.1 to 5.6 million individuals—could qualify for psilocybin therapy if it is approved.
“Our findings suggest that, pending FDA approval, psilocybin-assisted therapy could significantly benefit millions of Americans struggling with depression,” said Syed Fayzan Rab, MD candidate at Emory and lead author of the study. “This underscores the need to carefully consider the logistics of implementing such a novel treatment on a broad scale.”
The researchers began by identifying that out of nearly 15 million American adults with depression, about 9 million are treated annually. They then matched this population against eligibility criteria used in recent psilocybin trials. Their projections offer a spectrum of estimates: a “lower-bound” estimate of 24% if the most stringent trial criteria are applied, a “mid-range” estimate of 56% based on more realistic criteria, and an “upper-bound” estimate of 62% when including patients with multiple exclusionary conditions.
A notable portion of the increase from the lower to mid-range estimates is attributed to including patients with alcohol and substance use disorders, for whom psilocybin may offer potential benefits. Even the upper-bound estimate may be conservative, as it only considers current patients and does not factor in the possible influx of new patients attracted by the potential of psychedelic medicine.
The researchers caution that these projections are dependent on FDA approval specifics and real-world factors such as insurance coverage, availability of trained practitioners, and regional access disparities. Additionally, if psilocybin is approved for conditions beyond depression, demand could surge unpredictably.
“While our analysis is a crucial first step, it merely scratches the surface of understanding the potential public health impact of psilocybin therapy,” said Dr. Charles Raison, a collaborator on the study and lead investigator of a major psilocybin trial. “The actual potential of this treatment will depend on the decisions of regulatory bodies, policymakers, insurers, and the healthcare system. We hope our findings foster productive discussions and proactive planning to maximize benefits for patients while minimizing unintended consequences.”
As interest in psychedelic treatments grows, this study offers an essential look at the potential demand and challenges ahead. It highlights the need for continued research to refine demand estimates and ensure the equitable and effective delivery of psilocybin therapy if it receives FDA approval.