Between 2013 and 2022, calls to poison control centers involving psilocybin tripled, with nearly all of the increase occurring after 2019. This pattern was not seen for other substances. While the total number of such calls remains low, the trend may continue as psilocybin use rises.
Among U.S. adults who have ever used a hallucinogen, four distinct patterns of lifetime use emerge: a group primarily using psilocybin (16%), a larger group using both LSD and psilocybin (46%), a group mainly using ecstasy (23%), and a group using multiple hallucinogens (15%). Older age is associated with higher odds of being in the LSD/psilocybin class compared with the psilocybin-only class, and non-White participants have higher odds of being in the ecstasy class. These overlapping use patterns suggest that clinical trials and future policies should account for polysubstance hallucinogen experiences.