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Meredith C Meacham

Department of Psychiatry and Behavioral Sciences, University of California San Francisco, San Francisco, CA, USA.

3 papers in the library · 17 citations · publishing 2024-2025

Papers

THC-O-Acetate: Scarce Evidence for a Psychedelic Cannabinoid.

Journal of psychoactive drugs January 1, 2024 Daniel J Kruger, Carlton Cb Bone, Meredith C Meacham et al. 9 citations

A survey of THC-O-acetate users found that the semi-synthetic cannabinoid produces low to moderate cognitive distortions—altered sense of time, concentration difficulties, and short-term memory problems—with few visuals or hallucinations. Scores on the Mystical Experience Questionnaire were significantly below the threshold for a complete mystical experience across all four dimensions. Users who had previously used classic psychedelics (5-HT2A agonists) scored lower on all dimensions. When asked directly, 79% of respondents said using THC-O-acetate is "not at all" or "a little" of a psychedelic experience. Some reports of psychedelic effects may stem from expectations or contaminants.

Reviewing the Risk of Ketene Formation in Dabbing and Vaping Tetrahydrocannabinol-O-Acetate.

Cannabis and cannabinoid research October 1, 2024 Carlton Cb Bone, Charles Klein, Kaelas Munger et al. 6 citations

Most people who use THCO, a semisynthetic cannabinoid derived from hemp, vape it (74.9%), while about a quarter dab it (24.3%) and tend to use higher temperatures than those who vape. A small portion of users (12.0%) expressed concerns about the risk of ketene gas, which can form when THCO is heated and is harmful to the lungs. Because multiple factors influence ketene formation and consumer temperature choices may enable it, more research is needed to understand the harm profile of hemp-derived substances like THCO.

Self-reported experiences and perspectives on using psychedelics to manage opioid use among participants of two Reddit communities.

Addiction (Abingdon, England) January 16, 2025 Noa Krawczyk, Megan Miller, Emma Yuanqi Gu et al. 2 citations

People in online opioid-use-disorder communities hold diverse views on using psychedelics to manage opioid use. Many report that psychedelics reduce physical dependence symptoms, shift motivations away from opioids, and address underlying mental health issues. Others see the promise as exaggerated, noting that many eventually return to opioid use or consider psychedelics dangerous. The findings underscore an urgent need for controlled studies to understand psychedelics' effects on opioid use, their integration with existing treatments, and safety strategies.