Story perspectives

Surge in Cannabinoid Hyperemesis Syndrome Cases Among Users

12/10/2025

Summary

Story summary

A University of Illinois Chicago study finds rising cannabinoid hyperemesis syndrome (CHS) among heavy cannabis users, with about 100,000 suspected emergency department cases from 2016–2022.
Rates were low early on but spiked in 2020, likely due to increased cannabis use during the pandemic.
CHS is treatable by ceasing cannabis use but is often misdiagnosed.
The International Classification of Diseases now recognizes CHS, potentially boosting clinician awareness.

1 of 1

Story summary

A University of Illinois Chicago study finds rising cannabinoid hyperemesis syndrome (CHS) among heavy cannabis users, with about 100,000 suspected emergency department cases from 2016–2022.
Rates were low early on but spiked in 2020, likely due to increased cannabis use during the pandemic.
CHS is treatable by ceasing cannabis use but is often misdiagnosed.
The International Classification of Diseases now recognizes CHS, potentially boosting clinician awareness.