San Diego emergency medicine experts created a consensus treatment guideline for cannabinoid hyperemesis syndrome
An expert consensus panel in San Diego developed a CHS treatment guideline recommending capsaicin as first-line treatment, noting that haloperidol and olanzapine provide complete symptom relief in limited studies, while urging clinicians to avoid opioids and educate patients that only cannabis cessation provides lasting relief.
Quick Facts
What This Study Found
The San Diego Emergency Medicine Oversight Commission, county health services, and Kaiser Permanente toxicology created an expert consensus guideline for CHS treatment.
Key recommendations:
- Treatment should focus on symptom relief and patient education about cannabis cessation.
- Topical capsaicin (the active compound in chili peppers) is recommended as a first-line treatment. It is readily available and mimics the symptom relief patients seek from hot showers.
- Antipsychotics (haloperidol and olanzapine) have been reported to provide complete symptom relief in limited case studies.
- Conventional antiemetics including antihistamines, serotonin antagonists, dopamine antagonists, and benzodiazepines may have limited effectiveness.
- Emergency physicians should avoid opioids if CHS diagnosis is certain.
- Cannabis cessation is the only intervention that provides complete, lasting symptom relief.
The guideline was designed to reduce unnecessary opioid exposure, minimize healthcare resource use, and improve patient safety.
Key Numbers
Capsaicin recommended as first-line. Haloperidol and olanzapine reported to provide complete relief in limited studies. Conventional antiemetics described as having limited effectiveness.
How They Did This
Expert consensus panel including emergency medicine oversight, public health, and medical toxicology. Literature review informing guideline development.
Why This Research Matters
CHS patients often receive repeated ED visits with expensive workups, unnecessary procedures, and opioid prescriptions that do not address the underlying problem. A standardized treatment guideline can reduce costs, improve outcomes, and avoid contributing to opioid exposure.
The Bigger Picture
This guideline represents one of the first formal institutional efforts to standardize CHS management. As CHS prevalence increases with cannabis legalization, consistent treatment approaches become essential for emergency departments.
What This Study Doesn't Tell Us
Consensus-based guideline rather than evidence-based practice guideline. Underlying evidence is primarily case reports and case series. No randomized controlled trials of CHS treatments existed at the time of publication.
Questions This Raises
- ?Will randomized trials validate capsaicin as first-line CHS treatment?
- ?Is topical capsaicin as effective as IV haloperidol for acute symptom relief?
- ?How many ED visits can be prevented with proper CHS education?
Trust & Context
- Key Stat:
- Capsaicin recommended as first-line treatment; opioids should be avoided
- Evidence Grade:
- Moderate. Expert consensus from multiple institutions, but limited by the preliminary state of CHS treatment evidence.
- Study Age:
- Published in 2018. CHS treatment evidence has continued to accumulate, with capsaicin and haloperidol gaining wider acceptance.
- Original Title:
- Cannabinoid Hyperemesis Syndrome: Public Health Implications and a Novel Model Treatment Guideline.
- Published In:
- The western journal of emergency medicine, 19(2), 380-386 (2018)
- Authors:
- Lapoint, Jeff, Meyer, Seth, Yu, Charles K, Koenig, Kristi L, Lev, Roneet, Thihalolipavan, Sayone, Staats, Katherine, Kahn, Christopher A
- Database ID:
- RTHC-01726
Evidence Hierarchy
Summarizes existing research on a topic.
What do these levels mean? →Frequently Asked Questions
Why does capsaicin help with CHS?
Capsaicin activates TRPV1 receptors, the same receptors stimulated by hot water. This likely explains why CHS patients instinctively seek hot showers. Topical capsaicin cream applied to the abdomen can provide similar relief without the risks of prolonged hot bathing.
Why should opioids be avoided in CHS?
Opioids do not effectively treat CHS nausea and vomiting, can worsen nausea in some cases, and expose patients to addiction risk. CHS patients who visit the ED repeatedly may accumulate significant opioid exposure without benefit.
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Cite This Study
https://rethinkthc.com/research/RTHC-01726APA
Lapoint, Jeff; Meyer, Seth; Yu, Charles K; Koenig, Kristi L; Lev, Roneet; Thihalolipavan, Sayone; Staats, Katherine; Kahn, Christopher A. (2018). Cannabinoid Hyperemesis Syndrome: Public Health Implications and a Novel Model Treatment Guideline.. The western journal of emergency medicine, 19(2), 380-386. https://doi.org/10.5811/westjem.2017.11.36368
MLA
Lapoint, Jeff, et al. "Cannabinoid Hyperemesis Syndrome: Public Health Implications and a Novel Model Treatment Guideline.." The western journal of emergency medicine, 2018. https://doi.org/10.5811/westjem.2017.11.36368
RethinkTHC
RethinkTHC Research Database. "Cannabinoid Hyperemesis Syndrome: Public Health Implications..." RTHC-01726. Retrieved from https://rethinkthc.com/research/lapoint-2018-cannabinoid-hyperemesis-syndrome-public
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.