A case report documented cannabinoid hyperemesis syndrome with compulsive bathing in a psychiatric patient, the first such report in this population, suggesting the condition may be underrecognized in mental health settings.
Read this if you are a mental health clinician whose patients use cannabis regularly.
First documented CHS case in a psychiatric patient since the syndrome was identified in 2004
What the researchers found
This case report described cannabinoid hyperemesis syndrome (CHS) in a psychiatric patient, noting that while the syndrome had been documented since 2004, it had never been reported in psychiatric settings.
The clinical presentation included cyclical vomiting associated with chronic cannabis use and compulsive bathing behavior, consistent with the CHS profile identified in earlier reports.
The authors noted that despite cannabis's established anti-emetic properties, chronic use can paradoxically cause cyclical vomiting, and this condition may be underrecognized, particularly in psychiatric populations where cannabis use is common.
Why it matters
Cannabis use is highly prevalent among psychiatric patients. If CHS is underrecognized in this population, patients may undergo unnecessary investigations and treatments for their vomiting before the correct diagnosis is made.
The numbers in context
First reported case of CHS in a psychiatric patient. CHS was originally described by Allen et al. in 2004.
How the study worked
Single case report documenting clinical presentation of cannabinoid hyperemesis syndrome in a psychiatric patient.
What this study cannot tell us
Single case report. Cannot establish prevalence of CHS in psychiatric populations. Limited clinical details provided in the brief report.
How to read the evidence
Single case report providing a clinical observation. Raises awareness but cannot establish prevalence.
When this study was published
Published in 2010. CHS awareness has increased substantially since then, though it likely remains underdiagnosed in many clinical settings.
The bigger picture
CHS may be particularly underdiagnosed in psychiatric populations because clinicians may attribute vomiting to medications, anxiety, or other causes rather than considering chronic cannabis use. Greater awareness in mental health settings is needed.
Questions still open
- How common is CHS among psychiatric patients who use cannabis chronically? Could CHS be misdiagnosed as a side effect of psychiatric medications? Should psychiatric patients be routinely asked about cyclical vomiting and bathing behavior?
Common questions
Why is CHS important in psychiatric settings?
What is compulsive bathing?
Read the original research
Cannabis and hyperemesis.
Irish journal of psychological medicine, 27(1), 47-48
Citation
Harris, Ella; McDonagh, Michael; Kennedy, Noel. (2010). Cannabis and hyperemesis.. Irish journal of psychological medicine, 27(1), 47-48. https://doi.org/10.1017/S0790966700000938
Explore the wider topic
- CBD Oil Quality Guide: How to Avoid Snake Oil
- Anxiety After Quitting Weed: When to Consider Medication
- Cannabis for Chemotherapy Nausea: What the Evidence Actually Shows
- Cannabis for Chronic Pain: What the Research Actually Supports
- Cannabis and Epilepsy: The Epidiolex Story and What It Means
- Does CBD Actually Work for Anxiety? What the Evidence Shows
- Does CBD Help with Weed Withdrawal? What Studies Show
- CBD vs THC: The Differences That Actually Matter
- The Proven Medical Benefits of Cannabis: What Research Supports
- Quitting Weed Before Surgery
- Weed and Medications: What Changes When You Quit
- Quitting Weed During Pregnancy: What You Need to Know
- Quitting Weed While Pregnant: What You Need to Know
- Cannabis and Older Adults: Risks Seniors Should Know
- Cannabis and Breastfeeding: THC in Breast Milk