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Toxicology

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Cannabis Therapy in Veterinary Medicine
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Abstract

The incidence of accidental exposure and intoxication in pets is increasing with the rise in popularity and accessibility to cannabis and cannabinoid-containing products marketed for use in both pets and people. Exposure to synthetic cannabinoids is a growing concern as well. While the overall prognosis for unintentional exposures remains good, pets will no doubt receive more timely treatment from veterinarians who can quickly recognize the clinical signs associated with intoxication, understand when cases have the potential to become severe, and are aware of treatment protocols. This chapter encompasses the following: a brief outline of cannabinoid products and the endocannabinoid system; a summary of current published studies investigating the effects of cannabidiol (CBD) or delta-9-tetrahydrocannabinol (THC) including reported adverse effects; clinical signs of intoxication in dogs and cats as reported in the literature and to animal poison control centers; toxic doses of cannabinoids; and medical treatment approaches to cannabis intoxication in pets.

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References

  • Adams, I. B., & Martin, B. R. (1996). Cannabis: Pharmacology and toxicology in animals and humans. Addiction, 91(11), 1585–1614.

    Article  CAS  Google Scholar 

  • CSID:15266. (n.d.). Accessed June 24, 2018, from http://www.chemspider.com/Chemical-Structure.15266.html.

  • CSID:559095. (n.d.). Accessed June 24, 2018, from http://www.chemspider.com/Chemical-Structure.559095.html?rid=79a89166-d9cf-41ea-9313-8366b7493a83.

  • Culler, C. A., & Vigani, A. (2019). Successful treatment of a severe cannabinoid toxicity using extracorporeal therapy in a dog. Journal of Veterinary Emergency and Critical Care, 29(6), 674–679. https://doi.org/10.1111/vec.12899.

    Article  PubMed  Google Scholar 

  • Deabold KA, Schwark WS, Wolf L, Wakshlag JJ. Single-Dose Pharmacokinetics and Preliminary Safety Assessment with Use of CBD-Rich Hemp Nutraceutical in Healthy Dogs and Cats. Animals (Basel). 2019 Oct 19;9(10):832. doi: 10.3390/ani9100832. PMID: 31635105; PMCID: PMC6826847.

    Google Scholar 

  • Donaldson, C. W. (2002, June). Marijuana exposure in animals. Veterinary Medicine, 437–439.

    Google Scholar 

  • ElSohly, M. A., Mehmedic, Z., Foster, S., Gon, C., Chandra, S., & Church, J. C. (2016). Changes in cannabis potency over the last 2 decades (1995–2014): Analysis of current data in the United States. Biological Psychiatry, 79(7), 613–619. https://doi.org/10.1016/j.biopsych.2016.01.004.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  • Fitzgerald, K. T., Bronstein, A. C., & Newquist, K. L. (2013). Marijuana poisoning. Topics in Companion Animal Medicine, 28(1), 8–12. https://doi.org/10.1053/j.tcam.2013.03.004.

    Article  PubMed  Google Scholar 

  • Gamble, L.-J., Boesch, J. M., Frye, C. W., et al. (2018). Pharmacokinetics, safety, and clinical efficacy of cannabidiol treatment in osteoarthritic dogs. Frontiers in Veterinary Science, 5, 165. https://doi.org/10.3389/fvets.2018.00165.

    Article  PubMed  PubMed Central  Google Scholar 

  • Greb, A., & Puschner, B. (2018). Cannabinoid treats as adjunctive therapy for pets: Gaps in our knowledge. Toxicology Communications, 2(1), 10–14. https://doi.org/10.1080/24734306.2018.1434470.

    Article  Google Scholar 

  • Greenwich Biosciences. (2018, December). Epidiolex full prescribing information.

    Google Scholar 

  • Gugelmann, H., Gerona, R., Li, C., Tsutaoka, B., Olson, K. R., & Lung, D. (2014). ‘Crazy Monkey’ poisons man and dog: Human and canine seizures due to PB-22, a novel synthetic cannabinoid. Clinical Toxicology, 52(6), 635–638. https://doi.org/10.3109/15563650.2014.925562.

    Article  CAS  PubMed  Google Scholar 

  • Janczyk, P., Donaldson, C. W., & Gwaltney, S. (2004). Two hundred and thirteen cases of marijuana toxicoses in dogs. Veterinary and Human Toxicology, 46(1), 19–21.

    CAS  PubMed  Google Scholar 

  • Landa, L., Sulcova, A., & Gbelec, P. (2016). The use of cannabinoids in animals and therapeutic implications for veterinary medicine: A review. VeterinĂ¡rnĂ­ MedicĂ­na, 61(3), 111–122. https://doi.org/10.17221/8762-VETMED.

    Article  CAS  Google Scholar 

  • Long, E., Malone, D., & Taylor, D. (2005). The pharmacological effects of cannabidiol. Drugs of the Future, 30, 747.

    Article  CAS  Google Scholar 

  • Marzo, V. D., Bifulco, M., & Petrocellis, L. D. (2004). The endocannabinoid system and its therapeutic exploitation. Nature Reviews Drug Discovery, 3(9), 771–784. https://doi.org/10.1038/nrd1495.

    Article  CAS  PubMed  Google Scholar 

  • McGrath, S., Bartner, L. R., Rao, S., Kogan, L. R., & Hellyer, P. W. (2018). A report of adverse effects associated with the administration of cannabidiol in healthy dogs. AHVMA Journal, 52, 34–38.

    Google Scholar 

  • Meola, S. D., Tearney, C. C., Haas, S. A., Hackett, T. B., & Mazzaferro, E. M. (2012). Evaluation of trends in marijuana toxicosis in dogs living in a state with legalized medical marijuana: 125 dogs (2005-2010): THC toxicosis. Journal of Veterinary Emergency and Critical Care, 22(6), 690–696. https://doi.org/10.1111/j.1476-4431.2012.00818.x.

    Article  PubMed  Google Scholar 

  • Murphy, T. D., Weidenbach, K. N., Houten, C. V., et al. (2012). Acute kidney injury associated with synthetic cannabinoid use – Multiple States, 2012. MMWR. Morbidity and Mortality Weekly Report, 62(6), 93–98.

    Google Scholar 

  • Murray, R. M., Morrison, P. D., Henquet, C., & Forti, M. D. (2007). Cannabis, the mind and society: The hash realities. Nature Reviews. Neuroscience, 8(11), 885–895. https://doi.org/10.1038/nrn2253.

    Article  CAS  PubMed  Google Scholar 

  • Narimatsu, S., Watanabe, K., Matsunaga, T., et al. (1990). Inhibition of hepatic microsomal cytochrome P450 by cannabidiol in adult male rats. Chemical & Pharmaceutical Bulletin, 38(5), 1365–1368.

    Article  CAS  Google Scholar 

  • Obafemi, A. I., Kleinschmidt, K., Goto, C., & Fout, D. (2015). Cluster of acute toxicity from ingestion of synthetic cannabinoid-laced brownies. Journal of Medical Toxicology, 11(4), 426–429. https://doi.org/10.1007/s13181-015-0482-z.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  • Pet Poison Helpline & SafetyCall International. (2019). Pet poison helpline case database. Minneapolis, MN: Pet Poison Helpline & SafetyCall International, PLLC. Database last accessed: 2019

    Google Scholar 

  • Pirone, A., Lenzi, C., Coli, A., Giannessi, E., Stornelli, M. R., & Miragliotta, V. (2015). Preferential epithelial expression of type-1 cannabinoid receptor (CB1R) in the developing canine embryo. Springerplus, 4(1). https://doi.org/10.1186/s40064-015-1616-0.

  • Raber, J. C., Elzinga, S., & Kaplan, C. (2015). Understanding dabs: Contamination concerns of cannabis concentrates and cannabinoid transfer during the act of dabbing. The Journal of Toxicological Sciences, 40(6), 797–803. https://doi.org/10.2131/jts.40.797.

    Article  PubMed  Google Scholar 

  • Rosenkrantz, H., Fleischman, R. W., & Grant, R. J. (1981). Toxicity of short-term administration of cannabinoids to rhesus monkeys. Toxicology and Applied Pharmacology, 58(1), 118–131.

    Article  CAS  Google Scholar 

  • Saitman, A., Park, H.-D., & Fitzgerald, R. L. (2014). False-positive interferences of common urine drug screen immunoassays: A review. Journal of Analytical Toxicology, 38(7), 387–396. https://doi.org/10.1093/jat/bku075.

    Article  CAS  PubMed  Google Scholar 

  • Sharma, P., Murthy, P., & MMS, B. (2012). Chemistry, metabolism, and toxicology of cannabis: Clinical implications. Iranian Journal of Psychiatry, 7(4), 149–156.

    PubMed  PubMed Central  Google Scholar 

  • Teitler, J. B. (2009). Evaluation of a human on-site urine multidrug test for emergency use with dogs. Journal of the American Animal Hospital Association, 45(2), 59–66. https://doi.org/10.5326/0450059.

    Article  PubMed  Google Scholar 

  • Thomas, B. F., Compton, D. R., & Martin, B. A. (1990). Characterization of the lipophilicity of natural and synthetic analogs of L\9-tetrahydrocannabinol and its relationship to pharmacological potency. Journal of Pharmacology and Experimental Therapeutics, 255, 7.

    Google Scholar 

  • US Food & Drug Administration. (2018). Warning letters and test results for cannabidiol-related products. Accessed June 26, 2018, from https://www.fda.gov/NewsEvents/PublicHealthFocus/ucm484109.htm.

  • Vaughn, D. M., Kulpa, J., & Paulionis, L. (2020). Preliminary investigation of the safety of escalating cannabinoid doses in healthy dogs. Frontiers in Veterinary Science. https://doi.org/10.3389/fvets.2020.00051.

  • Wakshlag, J. J., Cital, S., Eaton, S. J., Prussin, R., & Hudalla, C. (2020). Cannabinoid, terpene, and heavy metal analysis of 29 over-the-counter commercial veterinary hemp supplements. Veterinary Medicine (Auckl), 11, 45–55. https://doi.org/10.2147/VMRR.S248712. PMID: 32346530; PMCID: PMC7169471.

  • Williams, K., Wells, R. J., & McLean, M. K. (2015). Suspected synthetic cannabinoid toxicosis in a dog. Journal of Veterinary Emergency and Critical Care, 25(6), 739–744. https://doi.org/10.1111/vec.12378.

    Article  PubMed  Google Scholar 

Download references

Acknowledgments

The author would like to express her gratitude to Amanda Poldoski, DVM, at Pet Poison Helpline for her data interpretation and creation of the figures in this text; to Holly Hommerding, DVM, DABT at Pet Poison Helpline for her previous research and writing on this topic; and to Morgan Maisel, DVM/MPH candidate 2019, for her work analyzing Pet Poison Helpline’s CBD and synthetic cannabinoid cases.

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Correspondence to Ahna Brutlag .

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Brutlag, A. (2021). Toxicology. In: Cital, S., Kramer, K., Hughston, L., Gaynor, J.S. (eds) Cannabis Therapy in Veterinary Medicine. Springer, Cham. https://doi.org/10.1007/978-3-030-68317-7_3

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