People who used both psilocybin and alcohol in the past year reported fewer depressive symptoms compared to those who used alcohol without psilocybin, based on a nationally representative U.S. survey. The analysis adjusted for age, sex, race, ethnicity, survey period, and other substance use. When cannabis and other psychedelic use were not accounted for, psilocybin use was also linked to lower anxiety symptoms. Because the study was observational and relied on self-reports, it cannot show cause and effect. The findings suggest potential mental health benefits of psilocybin when used alongside alcohol, but experimental and long-term studies are needed to confirm.
In a survey of 201 patients receiving medical ketamine for psychiatric or pain conditions, most reported either a positive change (54.7%) or no change (44.3%) in their use of other substances. Those with a past history of problematic substance use showed significantly greater reductions than those with present or no such history. Patients described reduced craving, less need to self-medicate, and increased motivation to quit substances. Ketamine did not appear to induce or increase drug use among those with minimal or no prior use, though some reported risky behaviors such as using other psychedelics or substituting alcohol with recreational ketamine. Further research is needed to identify and protect at-risk patients.