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My dog ate Tylenol 12 hours ago. Is it an emergency for a 22lb dog?

Updated on September 23rd, 2025

Pet's info: Dog | Jack Russell Terrier | Male | unneutered | 22 lbs

I got home and my petsitrer said my dog ate 12 500mg tylenol tablets about 12 hours ago. He is a 15 y/o 22 pound Jack Russell cross

1 Answer

Most Helpful Answer

Jennifer Summerfield, DVM CPDT-KA

Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on July 1st, 2017

Oh dear! I'm afraid that B needs to be seen by an emergency vet immediately. The toxic dose of Tylenol in dogs is considered to be 50-100 mg/kg. If B ate 12 500 mg tablets, this is a total of 6000 mg - with his body weight, this works out to 600 mg/kg, which is far above the amount that can cause serious toxicity issues or even death. I would recommend taking him to your nearest emergency clinic right away for treatment.
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