Pictured: Bromethalin

Poisonous to: Cats, Dogs, Horses, Birds

Level of toxicity: Potentially moderate to severe - depending on the amount ingested, time since ingestion, and concentration of the product

Common signs to watch for:

  • Lethargy
  • Weakness
  • Incoordination
  • Abnormal or uneven pupil size
  • Decreased consciousness
  • Tremors
  • Paralysis
  • Seizures

Mouse and rat poisons containing bromethalin cause swelling of the brain which results in neurological symptoms when ingested in toxic amounts. Unlike the long-acting anticoagulant (LAAC) mouse and rat poisons, this type of bait does not cause bleeding and is not treated with vitamin K1.  Common signs of bromethalin poisoning include lethargy, weakness, incoordination (ataxia), tremors, seizures, paralysis, and eventually death. Unfortunately, this type of mouse and rat poison does not have an antidote and cause serious and long-lasting effects. Treatment includes decontamination, IV fluids, and specific drugs to decrease brain swelling.  Cats are more sensitive to bromethalin than dogs. As this type of mouse and rat poison has a narrow margin of safety and no antidote, prompt therapy is often needed in all species.

Poison type: garage_items

Alternate names: rodenticide, rat bait, mouse bait