US adults aged 35–50 who used a hallucinogen in the past year.
Monitoring the Future adult panel (NIDA / University of Michigan). 2024 was reported as the highest on record; exact figure not yet confirmed, so it's not plotted. A 2025 RAND survey estimates 11 million US adults used psilocybin in the past year.
Share of past-year users who sought emergency medical treatment.
Global Drug Survey 2017 (self-selected, non-representative). Mushroom figure from Kopra et al. 2022; LSD figure from press coverage.
Expert panel score, 0–100 (higher is worse).
Nutt, King & Phillips 2010, The Lancet. Scores from the paper's summary; cannabis approximate.
Low average harm isn't zero harm: a 2024 Ontario study linked hallucinogen-related ER visits to higher later schizophrenia diagnoses (associational), and difficult trips can lead to risky behavior. The risk is mostly psychological and situational, not toxic.