Cannabis users hospitalized for hyperemesis had dangerously low phosphate levels that resolved on their own within hours
Six men hospitalized with cannabinoid hyperemesis syndrome had significant hypophosphatemia (dangerously low phosphate), with levels normalizing spontaneously within hours in some cases, possibly from hyperventilation-driven redistribution.
Quick Facts
What This Study Found
Between 2011 and 2014, six men treated for cannabinoid hyperemesis syndrome (CHS) at a VA Medical Center were found to have significant hypophosphatemia, with phosphate levels ranging from less than 1.0 to 1.3 mg/dL (normal: 2.5-4.5 mg/dL).
In three patients, phosphate levels normalized spontaneously within hours without supplementation, suggesting redistribution of phosphate between compartments rather than true depletion. Hyperventilation, observed in four of the six patients, may have contributed by shifting phosphate into cells.
This represents a previously unrecognized electrolyte complication of CHS that could have clinical consequences if severe or prolonged.
Key Numbers
6 male patients. Phosphate range: <1.0-1.3 mg/dL (normal 2.5-4.5). 3 patients normalized spontaneously within hours. Hyperventilation present in 4 of 6 patients. Study period: 2011-2014.
How They Did This
Retrospective case series of six male patients treated for cannabinoid hyperemesis syndrome at the San Diego VA Medical Center between 2011 and 2014. Phosphate levels and clinical features were reviewed from medical records.
Why This Research Matters
Severe hypophosphatemia can cause muscle weakness, respiratory failure, seizures, and cardiac dysfunction. Recognizing this as a feature of CHS is important for emergency medicine providers who may otherwise overlook phosphate testing in these patients or attribute symptoms to the hyperemesis itself.
The Bigger Picture
CHS is increasingly recognized but its full clinical picture continues to expand. Electrolyte derangements add another dimension to what was initially described as simply a vomiting syndrome. Clinicians managing CHS need to check electrolytes including phosphate, not just treat the nausea.
What This Study Doesn't Tell Us
Very small case series (6 patients, all male, all from a VA). The mechanism (hyperventilation-induced redistribution) is proposed but not definitively proven. Other causes of hypophosphatemia (vomiting, poor intake) may contribute. The cases may not represent the typical CHS population.
Questions This Raises
- ?How common is hypophosphatemia in CHS?
- ?Do other electrolyte abnormalities frequently accompany CHS?
- ?Should routine electrolyte panels be recommended for all CHS presentations?
Trust & Context
- Key Stat:
- Phosphate levels dropped to <1.0 mg/dL (normal: 2.5-4.5) in CHS patients
- Evidence Grade:
- Small case series of 6 patients from a single center. Identifies a novel clinical finding but cannot establish prevalence or definitive mechanism.
- Study Age:
- Published in 2017. The electrolyte complications of CHS continue to be characterized.
- Original Title:
- Hypophosphatemia in Users of Cannabis.
- Published In:
- American journal of kidney diseases : the official journal of the National Kidney Foundation, 69(1), 152-155 (2017)
- Authors:
- Cadman, Peter E
- Database ID:
- RTHC-01348
Evidence Hierarchy
Describes what happened to one person or a small group.
What do these levels mean? →Frequently Asked Questions
What is hypophosphatemia and why is it dangerous?
Hypophosphatemia is abnormally low blood phosphate. Phosphate is essential for cellular energy production, muscle function, and oxygen delivery. Severe cases can cause muscle weakness, respiratory failure, seizures, and heart rhythm problems.
Why did the phosphate levels fix themselves?
In three patients, phosphate normalized within hours without treatment. The researchers suggest hyperventilation (observed in most patients) shifted phosphate from the blood into cells, creating a temporary low reading rather than true depletion. Once breathing normalized, phosphate redistributed back.
Read More on RethinkTHC
- 420-sober-survival-guide
- CBT-cannabis-recovery
- THC-potency-increase-over-time
- cannabis-harm-reduction-opioids-alcohol-replacement
- cannabis-legalization-effects-health-data
- cannabis-relapse-cycle-pattern
- cannabis-tolerance-break-guide
- cold-turkey-vs-taper-quit-weed
- dating-sober-after-quitting-weed
- exercise-quitting-weed-anxiety-brain
- grieving-quitting-weed-loss
- help-someone-quit-weed
- how-to-cut-back-on-weed-moderation
- how-to-quit-weed
- journaling-weed-withdrawal
- marijuana-anonymous-SMART-recovery-compare
- meditation-mindfulness-weed-withdrawal
- microdosing-cannabis-benefits
- partner-still-smokes-weed
- partner-still-smokes-weed-quitting
- pink-cloud-sobriety-cannabis
- quit-weed-cold-turkey
- quit-weed-or-cut-back-which-is-better
- quit-weed-regret-went-back
- quitting-weed-20s
- quitting-weed-30s
- quitting-weed-after-years
- quitting-weed-during-crisis-divorce-job-loss
- quitting-weed-exercise
- quitting-weed-grief-loss-coping
- quitting-weed-legal-state
- quitting-weed-success-stories
- quitting-weed-triggers-environment
- relapsed-smoking-weed-what-to-do
- relapsed-weed
- safer-cannabis-use-guidelines
- should-i-quit-weed
- sober-music-festival-concert-without-weed
- sober-october-weed
- supplements-weed-withdrawal
- telling-friends-quitting-weed
- tolerance-break-weed
- weed-for-opioid-withdrawal
- weed-relapse-prevention-plan
- weed-relapse-why-it-happens
- weed-ritual-replacement
- weed-ruined-relationships
- weed-social-media-triggers-quit
Cite This Study
https://rethinkthc.com/research/RTHC-01348APA
Cadman, Peter E. (2017). Hypophosphatemia in Users of Cannabis.. American journal of kidney diseases : the official journal of the National Kidney Foundation, 69(1), 152-155. https://doi.org/10.1053/j.ajkd.2016.06.028
MLA
Cadman, Peter E. "Hypophosphatemia in Users of Cannabis.." American journal of kidney diseases : the official journal of the National Kidney Foundation, 2017. https://doi.org/10.1053/j.ajkd.2016.06.028
RethinkTHC
RethinkTHC Research Database. "Hypophosphatemia in Users of Cannabis." RTHC-01348. Retrieved from https://rethinkthc.com/research/cadman-2017-hypophosphatemia-in-users-of
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.