Intravenous Lipid Emulsion Therapy for Bromethalin Toxicity in a Dog

Area of Science:

• Veterinary Toxicology
• Small Animal Medicine
• Toxicology

Background:

• Bromethalin is a neurotoxic rodenticide increasingly used as anticoagulant rodenticides are phased out.
• Bromethalin poisoning in pets is a growing concern due to its lack of antidote and tendency to accumulate in fat.
• Intravenous lipid emulsions (ILEs) are a recognized treatment for various systemic toxicities in both human and veterinary medicine.

Observation:

• A dog ingested bromethalin rodenticide and received ILE treatment after decontamination failed.
• Serum samples were collected before and after ILE administration to measure desmethylbromethalin levels.
• The dog's serum desmethylbromethalin concentration decreased by 75% within one hour of ILE treatment.

Findings:

• This is the first reported case of successful bromethalin poisoning treatment in a dog using ILE.
• The rapid reduction in serum desmethylbromethalin suggests ILE effectively sequesters the toxin.
• The toxic metabolite's half-life in dogs is presumed similar to rats, indicating potential for prolonged toxicity without intervention.

Implications:

• ILE therapy presents a potential novel treatment strategy for bromethalin toxicosis in companion animals.
• Further research is warranted to establish optimal ILE protocols for bromethalin poisoning.
• This approach may improve outcomes for pets exposed to bromethalin rodenticides, a common household hazard.