
CDC study links rising ER visits to cannabis hyperemesis syndrome in heavy marijuana users
A CDC analysis of emergency-department data from about 7,500 facilities finds diagnoses of cannabis hyperemesis syndrome rose 16% from October to May after a dedicated diagnosis code was introduced, with nearly 200,000 syndrome-related ER visits since January 2023. The surge is largest among people aged 15–24, teenage girls and women, and among Black Americans and American Indian/Alaska Native groups, suggesting underdiagnosis in the past and highlighting the need for greater awareness and further research into high-potency THC and hemp-derived products’ impact on younger users.


