A 2025 Brown University laboratory study found that, compared with a placebo cannabis, smoking higher-potency THC cannabis was associated with 27% lower alcohol consumption and smoking lower-potency THC cannabis was associated with about 19% lower alcohol consumption during a two-hour ad libitum drinking session.
November 19, 2025
high
statistical
Randomized laboratory experiment in a bar-like setting where participants could drink freely for two hours after smoking cannabis or placebo.
A 2025 Brown University laboratory study led by Jane Metrik found that participants who smoked higher‑potency THC cannabis drank 27% less alcohol and participants who smoked lower‑potency THC cannabis drank about 19% less alcohol during a subsequent two‑hour ad‑libitum drinking session compared with a placebo cannabis condition.
November 19, 2025
high
temporal
Randomized, controlled laboratory experiment measuring alcohol consumption after cannabis administration.