How Cyclic Vomiting Syndrome and Cannabinoid Hyperemesis Syndrome Overlap and Differ
This review clarifies the clinical distinctions between cyclic vomiting syndrome (CVS) and cannabinoid hyperemesis syndrome (CHS), which share symptoms but have different causes and treatments.
Quick Facts
What This Study Found
CVS is a gut-brain interaction disorder linked to migraine and autonomic dysfunction, while CHS is directly caused by chronic heavy cannabis use. Despite overlapping symptoms, their management strategies differ significantly.
Key Numbers
Review comparing four shared clinical phases: prodromal, emetic, recovery, and interepisodic baseline health in both CVS and CHS.
How They Did This
Clinical review examining the intersection of cyclic vomiting syndrome and cannabinoid hyperemesis syndrome, comparing their pathophysiology, epidemiology, clinical phases, and management approaches.
Why This Research Matters
Many patients with cyclical vomiting use cannabis — either as a cause (CHS) or as self-treatment (CVS). Correctly distinguishing between these conditions prevents misdiagnosis and ensures appropriate treatment.
The Bigger Picture
As cannabis use increases, the overlap between CVS and CHS creates a diagnostic challenge. Patients may have CVS and develop CHS from cannabis self-medication, or CHS may be misdiagnosed as CVS, delaying the solution — stopping cannabis.
What This Study Doesn't Tell Us
Both conditions lack definitive biomarkers. The overlap between them makes differential diagnosis inherently challenging. Limited evidence on patients who may have both conditions simultaneously.
Questions This Raises
- ?Can CVS and CHS coexist in the same patient?
- ?Are there biomarkers that could definitively distinguish between the two conditions?
Trust & Context
- Key Stat:
- Evidence Grade:
- Clinical review providing practical diagnostic framework — useful for clinicians but limited by the inherent diagnostic uncertainty between these conditions.
- Study Age:
- Recent review addressing the increasingly relevant clinical question of differentiating these vomiting syndromes as cannabis use rises.
- Original Title:
- Cyclic Vomiting Syndrome and Cannabinoid Hyperemesis Syndrome: Their Intersection and Joint Existence.
- Published In:
- Gastroenterology clinics of North America, 54(3), 557-568 (2025)
- Authors:
- Yacob, Desale
- Database ID:
- RTHC-07990
Evidence Hierarchy
Summarizes existing research on a topic.
What do these levels mean? →Frequently Asked Questions
How can doctors tell CVS and CHS apart?
The key differentiator is cannabis use history — CHS resolves when cannabis use stops. CVS is associated with migraine history and autonomic dysfunction and persists regardless of cannabis use.
Can someone have both CVS and CHS?
It's possible — a CVS patient who uses cannabis heavily could develop overlapping CHS, making diagnosis and management more complex.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-07990APA
Yacob, Desale. (2025). Cyclic Vomiting Syndrome and Cannabinoid Hyperemesis Syndrome: Their Intersection and Joint Existence.. Gastroenterology clinics of North America, 54(3), 557-568. https://doi.org/10.1016/j.gtc.2025.05.004
MLA
Yacob, Desale. "Cyclic Vomiting Syndrome and Cannabinoid Hyperemesis Syndrome: Their Intersection and Joint Existence.." Gastroenterology clinics of North America, 2025. https://doi.org/10.1016/j.gtc.2025.05.004
RethinkTHC
RethinkTHC Research Database. "Cyclic Vomiting Syndrome and Cannabinoid Hyperemesis Syndrom..." RTHC-07990. Retrieved from https://rethinkthc.com/research/yacob-2025-cyclic-vomiting-syndrome-and
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.