How cannabis affects the gut: from antiemetic benefits to cannabinoid hyperemesis
Cannabis has complex effects on gastrointestinal health, with approved antiemetic uses for chemotherapy nausea but also links to cannabinoid hyperemesis syndrome in heavy users, and researchers question whether CHS is truly distinct from cyclic vomiting syndrome.
Quick Facts
What This Study Found
The endocannabinoid system regulates visceral sensation, nausea, vomiting, and the gut microbiome. While cannabis has FDA-approved antiemetic uses, chronic heavy use is linked to cannabinoid hyperemesis syndrome. The review questions whether CHS is a distinct entity or a subtype of cyclic vomiting unmasked by heavy cannabis use.
Key Numbers
FDA has approved cannabis-based medications (dronabinol, nabilone) for chemotherapy-induced nausea and vomiting. Over 5% of women use cannabis during pregnancy, partly for nausea.
How They Did This
Narrative review of evidence on gastrointestinal effects of cannabis and cannabinoids, covering endocannabinoid system physiology, antiemetic properties, CHS, IBS, and gut microbiome effects.
Why This Research Matters
Cannabis legalization and rising use have outpaced research on GI effects. Many people use cannabis for nausea or GI symptoms, making it important to understand both the potential benefits and the paradoxical risk of hyperemesis with heavy use.
The Bigger Picture
The paradox of cannabis as both antiemetic and cause of severe vomiting highlights how dose, frequency, and individual biology shape cannabis effects. The CHS vs. cyclic vomiting debate could change how heavy-use vomiting cases are diagnosed and treated.
What This Study Doesn't Tell Us
Narrative review with considerable heterogeneity in the underlying literature. Many GI studies are small or observational. The CHS vs. cyclic vomiting question remains unresolved.
Questions This Raises
- ?Is CHS truly distinct from cyclic vomiting syndrome?
- ?What role does the gut microbiome play in mediating cannabis effects on GI health?
- ?At what threshold of use does antiemetic benefit flip to hyperemesis risk?
Trust & Context
- Key Stat:
- CHS vs. cyclic vomiting debate
- Evidence Grade:
- Narrative review summarizing heterogeneous literature, providing useful synthesis but not systematic evaluation.
- Study Age:
- 2024 review of cannabis and gastrointestinal health evidence
- Original Title:
- Cannabis use in the United States and its impact on gastrointestinal health.
- Published In:
- Nutrition in clinical practice : official publication of the American Society for Parenteral and Enteral Nutrition, 39(2), 281-292 (2024)
- Authors:
- Alshaarawy, Omayma(9), Balasubramanian, Gokulakrishnan, Venkatesan, Thangam(12)
- Database ID:
- RTHC-05076
Evidence Hierarchy
Frequently Asked Questions
What is cannabinoid hyperemesis syndrome?
CHS involves recurrent episodes of severe nausea and intractable vomiting in chronic heavy cannabis users, often relieved by hot showers and cessation of cannabis use.
Can cannabis help with nausea?
Yes. Cannabis-based medications are FDA-approved for chemotherapy-induced nausea and vomiting, and cannabis affects the endocannabinoid system in ways that regulate nausea. However, heavy chronic use can paradoxically cause severe vomiting.
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Cite This Study
https://rethinkthc.com/research/RTHC-05076APA
Alshaarawy, Omayma; Balasubramanian, Gokulakrishnan; Venkatesan, Thangam. (2024). Cannabis use in the United States and its impact on gastrointestinal health.. Nutrition in clinical practice : official publication of the American Society for Parenteral and Enteral Nutrition, 39(2), 281-292. https://doi.org/10.1002/ncp.11111
MLA
Alshaarawy, Omayma, et al. "Cannabis use in the United States and its impact on gastrointestinal health.." Nutrition in clinical practice : official publication of the American Society for Parenteral and Enteral Nutrition, 2024. https://doi.org/10.1002/ncp.11111
RethinkTHC
RethinkTHC Research Database. "Cannabis use in the United States and its impact on gastroin..." RTHC-05076. Retrieved from https://rethinkthc.com/research/alshaarawy-2024-cannabis-use-in-the
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.