CHS Remains Frequently Misdiagnosed Despite Being Treatable with Hot Showers and Cannabis Cessation
A review of cannabinoid hyperemesis syndrome finds it is frequently misdiagnosed, standard antiemetics are typically ineffective, and hot water bathing provides characteristic symptomatic relief.
Quick Facts
What This Study Found
CHS is characterized by cyclical vomiting in chronic cannabis users, is frequently misdiagnosed leading to extensive investigations and delayed treatment, and standard antiemetics are typically ineffective. Hot water bathing/showering is a hallmark symptomatic relief. No standardized treatment protocol exists. Little is known about risk factors for developing CHS.
Key Numbers
Prevalence: probably rare but uncertain. Hot water bathing: characteristic relief. Standard antiemetics: typically ineffective. Cannabis cessation: essential for resolution. No standardized treatment protocol exists.
How They Did This
Narrative review of CHS diagnosis, management, and research gaps.
Why This Research Matters
CHS awareness is growing but misdiagnosis remains common, leading to unnecessary testing, repeated ED visits, and patient suffering. Understanding its unique features can reduce diagnostic delays.
The Bigger Picture
As cannabis use increases, CHS recognition becomes more important for clinicians. The lack of a predictive model for who will develop CHS means all chronic users are potentially at risk.
What This Study Doesn't Tell Us
Narrative review format. CHS prevalence is uncertain. Based largely on case reports. No randomized treatment trials exist. The mechanism of CHS remains poorly understood.
Questions This Raises
- ?What determines who develops CHS among chronic cannabis users?
- ?Could biomarkers help predict CHS risk?
Trust & Context
- Key Stat:
- Evidence Grade:
- Narrative review synthesizing case-based evidence without systematic methodology provides preliminary evidence.
- Study Age:
- Contemporary review of CHS literature.
- Original Title:
- Rare but relevant: Cannabinoid hyperemesis syndrome.
- Published In:
- Addiction (Abingdon, England), 120(2), 380-384 (2025)
- Authors:
- Stjepanović, Daniel(11), Kirkman, Julia, Hall, Wayne(24)
- Database ID:
- RTHC-07729
Evidence Hierarchy
Summarizes existing research on a topic.
What do these levels mean? →Frequently Asked Questions
How do you know if it's CHS and not something else?
CHS has distinctive features: cyclical vomiting in chronic cannabis users, relief from hot showers or baths, and failure of standard anti-nausea medications. The diagnosis is often missed because cannabis is not considered as a cause.
Does CHS go away?
Yes, with cannabis cessation. However, symptoms can return if cannabis use resumes. There is currently no way to predict who will develop CHS or how to prevent it.
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Cite This Study
https://rethinkthc.com/research/RTHC-07729APA
Stjepanović, Daniel; Kirkman, Julia; Hall, Wayne. (2025). Rare but relevant: Cannabinoid hyperemesis syndrome.. Addiction (Abingdon, England), 120(2), 380-384. https://doi.org/10.1111/add.16693
MLA
Stjepanović, Daniel, et al. "Rare but relevant: Cannabinoid hyperemesis syndrome.." Addiction (Abingdon, 2025. https://doi.org/10.1111/add.16693
RethinkTHC
RethinkTHC Research Database. "Rare but relevant: Cannabinoid hyperemesis syndrome." RTHC-07729. Retrieved from https://rethinkthc.com/research/stjepanovic-2025-rare-but-relevant-cannabinoid
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.