In dogs with suspected acetaminophen toxicity, which management approach is appropriate?

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Multiple Choice

In dogs with suspected acetaminophen toxicity, which management approach is appropriate?

Acetaminophen toxicity in dogs causes liver injury when a toxic metabolite (NAPQI) depletes glutathione and damages hepatocytes. The best management combines antidotal therapy, early decontamination, and strong supportive care, guided by liver function tests. If ingestion is suspected and hepatic signs are present, you should measure liver enzymes (like ALT/AST) and bilirubin to assess the extent of injury. Administer N-acetylcysteine, the antidote, because it replenishes hepatic glutathone stores and helps detoxify NAPQI, reducing further liver damage. If the ingestion was recent, decontaminating the gut with emetics or activated charcoal can lessen absorption. Throughout this process, provide aggressive supportive care—adequate IV fluids to support perfusion, antiemetics for vomiting, pain control as needed, and close monitoring for progression to liver failure or coagulation abnormalities. The other approaches don’t address the toxin’s mechanism or the need for an antidote. Atropine does not protect the liver, and vitamin K, while useful for coagulopathy from liver failure, is not the primary treatment for acetaminophen toxicity.

Acetaminophen toxicity in dogs causes liver injury when a toxic metabolite (NAPQI) depletes glutathione and damages hepatocytes. The best management combines antidotal therapy, early decontamination, and strong supportive care, guided by liver function tests.

If ingestion is suspected and hepatic signs are present, you should measure liver enzymes (like ALT/AST) and bilirubin to assess the extent of injury. Administer N-acetylcysteine, the antidote, because it replenishes hepatic glutathone stores and helps detoxify NAPQI, reducing further liver damage. If the ingestion was recent, decontaminating the gut with emetics or activated charcoal can lessen absorption. Throughout this process, provide aggressive supportive care—adequate IV fluids to support perfusion, antiemetics for vomiting, pain control as needed, and close monitoring for progression to liver failure or coagulation abnormalities.

The other approaches don’t address the toxin’s mechanism or the need for an antidote. Atropine does not protect the liver, and vitamin K, while useful for coagulopathy from liver failure, is not the primary treatment for acetaminophen toxicity.

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