Marijuana Poisoning in Dogs: Symptoms, Treatment, and the Growing Risk From Edibles
As marijuana decriminalization expanded, veterinary marijuana poisoning cases increased, with edibles containing concentrated medical-grade THC butter posing the greatest danger to dogs.
Quick Facts
What This Study Found
The review documented the clinical picture of marijuana poisoning in companion animals, primarily dogs. Common signs included depression, hypersalivation, dilated pupils, hypermetria, vomiting, urinary incontinence, tremors, hypothermia, and bradycardia. Higher doses could cause nystagmus, agitation, rapid breathing, tachycardia, ataxia, and seizures.
While the minimum lethal oral dose for dogs is over 3 g/kg of THC (giving it a high safety margin), deaths had occurred from ingestion of food products containing concentrated medical-grade THC butter. Treatment was primarily supportive, with no specific antidote. The use of intralipid therapy to bind THC was emerging as a treatment strategy.
Key Numbers
Minimum lethal oral dose: >3 g/kg THC. Clinical onset: within 60 minutes of oral ingestion. 15% of THC excreted in urine, rest via feces. Two cannabinoid receptors: CB1 (CNS) and CB2 (peripheral). Deaths reported from concentrated THC butter products.
How They Did This
Narrative review of veterinary marijuana toxicology literature covering pharmacology, clinical presentation, diagnosis, and treatment. Included discussion of CB1 and CB2 receptor distribution in dogs, THC metabolism, and diagnostic testing limitations.
Why This Research Matters
As cannabis becomes more accessible and concentrated products become more common, the risk to pets increases. Dogs are particularly vulnerable because they commonly ingest their owners' marijuana supply. The emergence of concentrated THC edibles creates a risk category that did not previously exist.
The Bigger Picture
This review highlighted an under-discussed consequence of cannabis normalization: increased risk to household pets. The shift toward concentrated edibles particularly changes the risk calculus from a high-safety-margin plant to potentially lethal concentrated products.
What This Study Doesn't Tell Us
Mostly based on case reports and clinical experience rather than controlled studies. Human urine drug tests for cannabinoids are unreliable in dogs. The lethal dose data comes from limited historical studies. Treatment recommendations were largely empirical.
Questions This Raises
- ?Has the rate of pet marijuana poisoning continued to increase with legalization?
- ?Are concentrated edibles responsible for the most serious cases?
- ?Should cannabis packaging include pet safety warnings?
Trust & Context
- Key Stat:
- Deaths reported from concentrated medical-grade THC butter ingestion in dogs
- Evidence Grade:
- Clinical review of veterinary toxicology; moderate evidence for presentation and management.
- Study Age:
- Published in 2013. Pet marijuana poisoning cases have continued to increase alongside legalization.
- Original Title:
- Marijuana poisoning.
- Published In:
- Topics in companion animal medicine, 28(1), 8-12 (2013)
- Authors:
- Fitzgerald, Kevin T, Bronstein, Alvin C(3), Newquist, Kristin L
- Database ID:
- RTHC-00679
Evidence Hierarchy
Summarizes existing research on a topic.
What do these levels mean? →Frequently Asked Questions
Can marijuana kill a dog?
The plant material itself has a high safety margin (lethal dose over 3 g/kg THC), and most dogs recover fully. However, deaths have been reported from ingestion of concentrated THC products like medical-grade THC butter used in edibles. The risk depends heavily on the concentration of THC in the product consumed.
What should you do if your dog eats marijuana?
Seek veterinary care immediately. Common symptoms include lethargy, dilated pupils, loss of coordination, vomiting, and urinary incontinence. Treatment is primarily supportive (monitoring vital signs, IV fluids, sedation if needed). There is no specific antidote. Bring any packaging to help the vet assess the THC concentration involved.
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Cite This Study
https://rethinkthc.com/research/RTHC-00679APA
Fitzgerald, Kevin T; Bronstein, Alvin C; Newquist, Kristin L. (2013). Marijuana poisoning.. Topics in companion animal medicine, 28(1), 8-12. https://doi.org/10.1053/j.tcam.2013.03.004
MLA
Fitzgerald, Kevin T, et al. "Marijuana poisoning.." Topics in companion animal medicine, 2013. https://doi.org/10.1053/j.tcam.2013.03.004
RethinkTHC
RethinkTHC Research Database. "Marijuana poisoning." RTHC-00679. Retrieved from https://rethinkthc.com/research/fitzgerald-2013-marijuana-poisoning
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.