Rat poison-contaminated synthetic cannabinoids caused severe bleeding in 16 patients, costing thousands per hospitalization
In a 16-patient cohort with bleeding from synthetic cannabinoids contaminated with the rat poison brodifacoum, 75% had severely elevated clotting times at presentation, one patient died, and average treatment cost was $5,300 per hospitalization.
Quick Facts
What This Study Found
Hematuria was the most common bleeding symptom. 75% had INR >9.6 at presentation (normal is ~1.0). 92% of those tested were positive for brodifacoum. 75% achieved INR below 2 within 24 hours of treatment. One patient (6%) died. Median hospital stay was 4 days. Average pharmacological treatment cost was $5,300.
Key Numbers
16 patients. INR >9.6: 75%. Brodifacoum positive: 12/13 tested (92%). INR <2 within 24 hours: 75%. Death: 1/16 (6%). Median hospital stay: 4 days (IQR 3-6). Average treatment cost: $5,300 (range $2,241-$8,086).
How They Did This
Observational case series of 16 patients with suspected exposure to LAAR-contaminated synthetic cannabinoids and associated bleeding, treated within the Johns Hopkins Health System. Management included IV/oral vitamin K, blood products, and laboratory monitoring.
Why This Research Matters
The brodifacoum contamination outbreak demonstrated that synthetic cannabinoid dangers extend beyond the drugs themselves to their unregulated manufacturing. This series provides a practical management algorithm for a toxicity pattern emergency physicians may encounter again.
The Bigger Picture
Contaminated synthetic cannabinoids represent a public health failure of unregulated drug markets. The brodifacoum contamination pattern, seen across multiple US outbreaks, shows how prohibition can create dangers that would not exist with regulated products.
What This Study Doesn't Tell Us
Single health system cohort. Long-term outcomes after discharge not reported. Brodifacoum has a very long half-life, so patients may need prolonged vitamin K treatment beyond the study period. Specific SC compounds not identified.
Questions This Raises
- ?How long do patients need vitamin K after brodifacoum exposure?
- ?Are there other contaminants in synthetic cannabinoid products that have not been detected?
- ?Would rapid brodifacoum testing change emergency management?
Trust & Context
- Key Stat:
- 92% brodifacoum positive
- Evidence Grade:
- Rated moderate because this is a systematic case series from an academic health system with consistent treatment protocols, though it is observational.
- Study Age:
- Published in 2019. Similar contamination outbreaks have been reported in multiple US states.
- Original Title:
- Synthetic cannabinoid-associated coagulopathy secondary to long-acting anticoagulant rodenticides: Observational case series and management recommendations.
- Published In:
- Medicine, 98(36), e17015 (2019)
- Authors:
- Bahouth, Mona N, Kraus, Peggy, Dane, Kathryn, Plazas Montana, Manuela, Tsao, William, Tabaac, Burton, Jasem, Jagar, Schmidlin, Holly, Einstein, Evan, Streiff, Michael B, Shanbhag, Satish
- Database ID:
- RTHC-01930
Evidence Hierarchy
Watches what happens naturally without intervening.
What do these levels mean? →Frequently Asked Questions
Why were synthetic cannabinoids contaminated with rat poison?
The reason for brodifacoum contamination is not entirely clear. It may be intentional adulteration or contamination during manufacturing. Brodifacoum is a potent anticoagulant that causes severe, prolonged bleeding.
How is this treated?
The management algorithm includes intravenous and oral vitamin K, careful use of blood products, and close lab monitoring. Most patients achieved improved clotting within 24 hours, but brodifacoum has a long half-life requiring extended treatment.
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Cite This Study
https://rethinkthc.com/research/RTHC-01930APA
Bahouth, Mona N; Kraus, Peggy; Dane, Kathryn; Plazas Montana, Manuela; Tsao, William; Tabaac, Burton; Jasem, Jagar; Schmidlin, Holly; Einstein, Evan; Streiff, Michael B; Shanbhag, Satish. (2019). Synthetic cannabinoid-associated coagulopathy secondary to long-acting anticoagulant rodenticides: Observational case series and management recommendations.. Medicine, 98(36), e17015. https://doi.org/10.1097/MD.0000000000017015
MLA
Bahouth, Mona N, et al. "Synthetic cannabinoid-associated coagulopathy secondary to long-acting anticoagulant rodenticides: Observational case series and management recommendations.." Medicine, 2019. https://doi.org/10.1097/MD.0000000000017015
RethinkTHC
RethinkTHC Research Database. "Synthetic cannabinoid-associated coagulopathy secondary to l..." RTHC-01930. Retrieved from https://rethinkthc.com/research/bahouth-2019-synthetic-cannabinoidassociated-coagulopathy-secondary
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.