Journal of Psychoactive Drugs
August 12, 2026
Jennifer S. Jewell, C. James, Joshua C. Black
There is still inconsistency in psychedelic research across the United States. There are gaps in our understanding of the psychedelic community's perception of topics including reasons for use and set/setting. The goal is to utilize these findings to produce better quantitative research, to ask the right questions of the right communities. This qualitative study organized focus groups from...
World Psychiatry
June 1, 2026
Christina Chwyl, Michael S. Ladka, Joshua C. Black et al.
Prevalence and predictors of sexual and physical violence during psychedelic use in a US population-based study.
Journal of Medical Internet Research
April 27, 2026
Karilynn M Rockhill, Elizabeth A Bemis, Nicole Schow et al.
2 citations
Mainstays of pharmacoepidemiology are large, representative, behavioral surveys, which focus on many drugs with few detailed behaviors. Smaller, targeted studies measure drug-specific patterns but without explicit generalizability assumptions; the evidence generated is narrow. In this cross-sectional survey study, we outline an estimation framework based on data fusion and combine two surveys:...
Journal of Psychoactive Drugs
March 16, 2026
Faith E Lyons, Karilynn M Rockhill, Evelyn J Fox et al.
Expanding regulation and increased use of psychedelic substances requires surveillance of behaviors and health outcomes in the United States. Widely comprehendible terminology is important for surveys. The objective of this study was to determine what psychedelic terminology is preferred among adults who used a psychedelic in the past 12 months. A cross-sectional survey measuring psychedelic...
JAMA
March 12, 2026
Joshua C. Black, Gabrielle E. Bau, Ryan Cook et al.
2 citations
This survey study examines the estimated increase in 12-month psilocybin use in Oregon and Colorado associated with decriminalization.
Annals of emergency medicine
June 30, 2025
Joshua C. Black, Karilynn M Rockhill, Evelyn J Fox et al.
4 citations
Oregon and Colorado have legalized possession of natural psychedelic drugs. We assessed if travel to use psychedelics in decriminalized states is occurring and compared the use patterns of travelers with nontravelers. The National Survey Investigating Hallucinogen Trends is a cross-sectional behavioral survey fielded from April to June 2024 to every US state. The survey asks whether individuals...
American Journal of Public Health
May 1, 2025
Karilynn M Rockhill, Joshua C. Black, Janetta Iwanicki et al.
17 citations
Objectives. To characterize present-day polysubstance use patterns in the general adult population. Methods. From a 2022 nationally representative survey in the United States, we defined polysubstance use as last 12-month use of 2 or more drugs (n = 15 800). Latent class analyses included medical (as indicated) and nonmedical (not as directed) use of prescription opioids, stimulants,...
International Journal of Mental Health and Addiction
April 1, 2025
Joshua C. Black, Nicole Schow, Hannah L. Burkett et al.
3 citations
Psychedelic-assisted therapy could transform treating psychiatric illness, but harms from exacerbating substance use disorder (SUD) among adults with psychiatric illness using psychedelics have not been studied. A cross-sectional survey in the US was used to test whether Drug Abuse Screening Test scores (DAST-10, validated instrument predicting SUD) were more severe when psychiatric illnesses...
Drug and Alcohol Dependence
March 1, 2025
Joseph J Palamar, Jennifer S. Jewell, Omar El-Shahawy et al.
9 citations
Off-label prescribing of ketamine to treat psychiatric disorders has been increasing, as has recreational use and availability of illicit ketamine. It is important to examine trends in ketamine-related poisonings to inform public health efforts. We examined data from poisonings (exposures) involving ketamine reported to Poison Centers in the US between 2019 and 2023 (n = 1519). Annual trends...
Annals of emergency medicine
December 1, 2024
Mark W Simon, Heather A Olsen, Christopher O Hoyte et al.
12 citations
Psychedelic substances use is increasing in the United States (US). The approval of new psychedelic drugs and legalization of natural psychedelic substances will likely further increase exposures and subsequent adverse events. The study objective is to describe the clinical effects, therapies, and medical outcomes of patients with psychedelic exposures reported to US poison centers. We...
Addiction
June 17, 2024
P. Todd Korthuis, Adrianne R Wilson-Poe, Joshua C. Black et al.
1 citation
As psychedelic use expands, the number of adverse effects will increase proportionally. New frameworks for monitoring safety outcomes on a population level are required to limit potential harms. Darke et al. characterized 33 lysergic acid diethylamide (LSD) and 10 psilocybin-related deaths in Australia between 2000 and 2023 using the country's sophisticated national coroner data system....
Nature Mental Health
May 1, 2024
Joshua C. Black, Andrew A. Monte, Nabarun Dasgupta et al.
5 citations
The encouraging results of late-phase clinical trials investigating psychedelic-assisted psychotherapy suggests that US Food and Drug Administration approval and subsequent expansion of use is imminent in the USA. Without fit-for-purpose postmarket surveillance to proactively monitor utilization by patients and providers, there is a risk that the real-world benefits of psychedelic-assisted...
Dreaming (New York, N.Y.)
March 1, 2019
Joshua C. Black, K. Belicki, Jessica Emberley-Ralph
This research addressed the question of why some bereaved individuals dream of the deceased whereas others do not. Two studies were conducted. In one, participants were 268 U.S. residents (150 men, 116 women, 1 other, and 1 undisclosed), with an age range of 20 to 70 (M = 33.8), who had lost a romantic partner or spouse in the previous 12 to 24 months. The second study had 162 U.S. residents...