Thirty-four states, the District of Columbia, and Puerto Rico have legalized medical cannabis. While no two state medical cannabis programs are alike, public health concerns related to advertising, packaging and labeling, pesticide use, scientific research, and the role of medical cannabis in the opioid crisis are emerging across the country. This article examines these issues, the policy approaches states are adopting to protect patients and the public, and an assessment of the underlying federal legal landscape.
