Cannabinoid Hyperemesis Syndrome Triggered a Manic Episode by Reducing Mood Stabilizer Levels
A patient with bipolar disorder developed cannabinoid hyperemesis syndrome, and the three weeks of vomiting likely lowered their mood stabilizer blood levels enough to trigger a manic episode.
Quick Facts
What This Study Found
This case report describes a patient with bipolar disorder who developed cannabinoid hyperemesis syndrome (CHS), the vomiting condition seen in heavy cannabis users. The resulting three weeks of persistent vomiting likely prevented adequate absorption of their mood stabilizer medication, lowering serum levels and precipitating a manic episode.
The case illustrates an underappreciated risk of CHS: for patients on oral psychiatric medications, prolonged vomiting can disrupt medication absorption and trigger the very psychiatric conditions those medications are designed to prevent.
The patient's CHS resolved with cessation of cannabis use, consistent with the established treatment for this condition.
Key Numbers
Three weeks of vomiting preceded the manic episode. CHS symptoms were characterized by cyclic nausea and vomiting with relief from hot bathing. Mood stabilizer serum levels were lowered by poor oral absorption during the vomiting period.
How They Did This
Single case report of a patient presenting with both cannabinoid hyperemesis syndrome and bipolar mania. The temporal relationship between CHS-induced vomiting, medication levels, and mania onset was analyzed.
Why This Research Matters
This case highlights an important and overlooked interaction between heavy cannabis use and psychiatric treatment. CHS is not just a gastrointestinal problem. For the many patients who use cannabis while taking psychiatric medications, CHS-induced vomiting can create a dangerous secondary psychiatric crisis.
The Bigger Picture
As cannabis use becomes more common among people with psychiatric diagnoses, the intersection of CHS and psychiatric medication management deserves more attention. This case demonstrates that cannabis side effects can have cascading consequences that go well beyond the direct effects of the drug.
What This Study Doesn't Tell Us
Single case report cannot establish causality. Other factors may have contributed to the manic episode. The specific mood stabilizer levels before and during CHS were not reported in detail.
Questions This Raises
- ?How common is this cascade of CHS leading to psychiatric medication failure?
- ?Should patients on mood stabilizers be specifically warned about CHS risk?
- ?Would monitoring drug levels during CHS episodes prevent psychiatric crises?
Trust & Context
- Key Stat:
- 3 weeks of CHS vomiting lowered mood stabilizer levels, triggering mania
- Evidence Grade:
- Single case report providing clinical illustration of an important drug-condition interaction. No statistical evidence.
- Study Age:
- Published in 2016. Cannabis potency and CHS prevalence have both increased since.
- Original Title:
- Cannabinoid hyperemesis syndrome and the onset of a manic episode.
- Published In:
- BMJ case reports, 2016 (2016)
- Authors:
- Gregoire, Phillip, Tau, Michael, Robertson, David
- Database ID:
- RTHC-01168
Evidence Hierarchy
Describes what happened to one person or a small group.
What do these levels mean? →Frequently Asked Questions
Can cannabinoid hyperemesis syndrome affect psychiatric medications?
Yes. In this case, three weeks of CHS-induced vomiting likely prevented adequate absorption of a mood stabilizer, lowering blood levels enough to trigger a manic episode.
What should bipolar patients who use cannabis know?
Heavy cannabis use can cause cannabinoid hyperemesis syndrome, and the resulting prolonged vomiting can interfere with oral medication absorption, potentially triggering psychiatric episodes.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-01168APA
Gregoire, Phillip; Tau, Michael; Robertson, David. (2016). Cannabinoid hyperemesis syndrome and the onset of a manic episode.. BMJ case reports, 2016. https://doi.org/10.1136/bcr-2016-215129
MLA
Gregoire, Phillip, et al. "Cannabinoid hyperemesis syndrome and the onset of a manic episode.." BMJ case reports, 2016. https://doi.org/10.1136/bcr-2016-215129
RethinkTHC
RethinkTHC Research Database. "Cannabinoid hyperemesis syndrome and the onset of a manic ep..." RTHC-01168. Retrieved from https://rethinkthc.com/research/gregoire-2016-cannabinoid-hyperemesis-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.