How Cannabis Regulation Became a Giant Experiment
Tue Feb 03 2026
Cannabis policy in the United States has been, in many ways, a giant experiment. The drug was recently reclassified by the Trump administration from a Schedule I to a Schedule III drug, but remains federally illegal. On the state level, cannabis’s availability to patients and consumers has been determined by voters, not by scientists and regulators. Each state has a different approach to cannabis regulation and product safety, and as a result, a patient using medical cannabis in Florida might be exposed to different risks than a consumer in California, for example.
On this episode, host Kelsey Schoenberg is joined by toxicologist Maxwell C. K. Leung, assistant professor at Arizona State University and the director of the ASU Cannabis Analytics, Safety and Health Initiative, and Symone T. Griffith, an ASU Presidential Scholar and doctoral candidate at Arizona State University. Leung and Griffith, who wrote about cannabis regulation and product safety for the Fall 2025 Issues, explain how the federal-state legal divide has shaped cannabis safety, research, and policy. They also share what it’s like to be a researcher working in this space.
RESOURCES
Read Leung, Griffith, and Marisa Kreider’s essay, “A Coordinated Approach to Cannabis Policy and Product Safety,” in the Fall Issues.Check out Leung and Griffith’s paper on cannabis use and Parkinson’s patients, as well as their lab’s analysis of state-level regulations for cannabis contaminants.Read a paper from the Cannabis Regulators Association outlining a research agenda for how science can shape cannabis policy.Listen to another episode on cannabis: “Minimizing Cannabis’s Harms to Public Health,” with Sara Frueh and guest Yasmin Hurd.
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Cannabis policy in the United States has been, in many ways, a giant experiment. The drug was recently reclassified by the Trump administration from a Schedule I to a Schedule III drug, but remains federally illegal. On the state level, cannabis’s availability to patients and consumers has been determined by voters, not by scientists and regulators. Each state has a different approach to cannabis regulation and product safety, and as a result, a patient using medical cannabis in Florida might be exposed to different risks than a consumer in California, for example. On this episode, host Kelsey Schoenberg is joined by toxicologist Maxwell C. K. Leung, assistant professor at Arizona State University and the director of the ASU Cannabis Analytics, Safety and Health Initiative, and Symone T. Griffith, an ASU Presidential Scholar and doctoral candidate at Arizona State University. Leung and Griffith, who wrote about cannabis regulation and product safety for the Fall 2025 Issues, explain how the federal-state legal divide has shaped cannabis safety, research, and policy. They also share what it’s like to be a researcher working in this space. RESOURCES Read Leung, Griffith, and Marisa Kreider’s essay, “A Coordinated Approach to Cannabis Policy and Product Safety,” in the Fall Issues.Check out Leung and Griffith’s paper on cannabis use and Parkinson’s patients, as well as their lab’s analysis of state-level regulations for cannabis contaminants.Read a paper from the Cannabis Regulators Association outlining a research agenda for how science can shape cannabis policy.Listen to another episode on cannabis: “Minimizing Cannabis’s Harms to Public Health,” with Sara Frueh and guest Yasmin Hurd.