Is Acetaminophen (Tylenol) Toxic to Dogs?

Acetaminophen is one of the most dangerous medications for cats. A single regular-strength Tylenol tablet can kill a cat. Dogs are more tolerant but can still suffer liver failure. Cats lack a crucial liver enzyme needed to process it.

Quick Answer

Yes, acetaminophen (tylenol) is toxic to dogs. LETHAL to cats — 1 pill can be fatal. Acetaminophen is one of the most dangerous medications for cats. A single regular-strength Tylenol tablet can kill a cat. Dogs are more tolerant but can still suffer liver failure. Cats lack a crucial liver enzyme needed to process it. Watch for symptoms like cats: facial/paw swelling, brown gums, difficulty breathing, death & dogs: vomiting, liver failure, dark urine.

Emergency

If your dog has ingested acetaminophen (tylenol), contact your vet or ASPCA Poison Control (888-426-4435) immediately.

Symptoms of Acetaminophen (Tylenol) Poisoning

Cats: Facial/paw swelling, brown gums, difficulty breathing, death
Dogs: Vomiting, liver failure, dark urine
Lethargy and depression
Chocolate-brown colored gums (methemoglobinemia)

Typical Timeline

Cats: Symptoms within 1-4 hours. Can be fatal within 18-36 hours. Dogs: 24-72 hours for liver damage.

Treatment Options

EMERGENCY VET immediately
N-acetylcysteine (NAC) antidote
Vitamin C to help restore oxygen-carrying capacity
IV fluids and liver support
Blood transfusion in severe cases

Prevention Tips

NEVER give Tylenol to pets
Store all medications securely
One tablet can kill a cat
Even "extra strength" chewables are dangerous

Other Toxins Dangerous to Dogss

🐱 Cats version →🐰 Rabbits version →🐦 Birds version →🐹 Hamsters version →

Frequently Asked Questions

Is acetaminophen (tylenol) toxic to dogs?▼

LETHAL to cats — 1 pill can be fatal. Acetaminophen is one of the most dangerous medications for cats. A single regular-strength Tylenol tablet can kill a cat. Dogs are more tolerant but can still suffer liver failure. Cats lack a crucial liver enzyme needed to process it.

What happens if my dog is exposed to acetaminophen (tylenol)?▼

Symptoms include: Cats: Facial/paw swelling, brown gums, difficulty breathing, death; Dogs: Vomiting, liver failure, dark urine; Lethargy and depression. Cats: Symptoms within 1-4 hours. Can be fatal within 18-36 hours. Dogs: 24-72 hours for liver damage.

What should I do if my dog ingested acetaminophen (tylenol)?▼

EMERGENCY VET immediately. N-acetylcysteine (NAC) antidote. Vitamin C to help restore oxygen-carrying capacity.

How can I protect my dog from acetaminophen (tylenol)?▼

NEVER give Tylenol to pets. Store all medications securely. One tablet can kill a cat. Even "extra strength" chewables are dangerous.