Please see the fifth article of the Spring 2026 issue!
http://msrj.chm.msu.edu/wp-content/uploads/2026/08/Unraveling-the-High.pdf
Background: On November 6, 2018, 56% of Michigan voters approved Proposition 1, making Michigan the first state in the Midwest to legalize cannabis. Currently, about one in nine Michigan residents (11.6%) reports past-month cannabis use. The growing availability and public acceptance of cannabis in Michigan has led to a marked increase in emergency department (ED) visits.
Objectives: Our purpose was to analyze the clinical characteristics and outcomes of patients presenting to the ED following recreational cannabis use. Patients admitted to the hospital were compared to those treated in the ED and released.
Methods: This was a retrospective cohort analysis of consecutive patients diagnosed with toxicity related to cannabis use. Patients were seen at eight EDs over a 36-month study period (November 2018-October 2021). Spanning 13 counties in Michigan, affiliated institutions included three rural medical centers, three university-affiliated hospitals, and a children’s tertiary care facility. Data included demographics, clinical features, and treatment outcomes in cannabis patients admitted to the hospital from the ED versus those treated and released. Chi-squared and t-tests were used to compare these cohorts across key demographic and clinical variables.
Results: During the study period, 1435 patients were evaluated for cannabis toxicity; 1256 (87.5%) were treated and discharged from the ED, 120 (8.4%) were hospitalized, and 59 (4.1%) were transferred to a psychiatric facility. The majority (65.4%) of children less than 12 years of age were admitted for accidental ingestions of cannabis. In comparison, adolescents (ages 12-19) and adults (> 19 years) had similar rates of hospital admission (6.4% versus 7.3%, respectively; p=0.61). Adolescents and young adults had a higher frequency of psychiatric chief complaints compared to older adults (25.5% vs. 7.5%, p< 0.001) and were more likely to be transferred to a psychiatric facility or jail (7.5% vs 1.9%, p< 0.001). Emergency department patients were significantly more likely to be admitted if they were male, ingested cannabis (e.g., baked goods), presented with cardiovascular or neurological chief complaints, were pregnant, had multiple comorbidities, or had a history of polysubstance abuse. The mean hospital length of stay was 2.3 days (range 1-11 days).
Conclusions: In this community-based ED study, 12.5% of patients with cannabis toxicity were hospitalized or transferred to a psychiatric facility. Because of the widespread use of cannabis in our society, ED clinicians must educate and inform our high-risk patients of the dangers of continued cannabis use.