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My 20lb dog ate a 5000 IU vitamin D3 tablet. Will he be okay?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | unneutered | 6 months and 13 days old | 20 lbs

Hello, this morning my 20lb dog digested a vitamin d3, 5000iu tablet. Should I be concerned I tried to make him throw it up and he wouldn't. Im very concerned, he seems okay.

2 Answers

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on February 7th, 2018

Hi there! As long as Buddy only ate one tablet, this dose would not be expected to cause any problems. The toxic dose of vitamin D3 in dogs is 100 mcg/kg or above. 5000 IU = 125 mcg, and Buddy weighs about 9 kg, which means he got a total dose of about 14 mcg/kg. This is well below the reported toxic dose, so it's very unlikely that this will be an issue :)

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    Answered By Makenzie Kurth, DVM

    Veterinarian

    Published on

    I would STRONGLY recommend calling ASPCA Poison Control (1-888-426-4435). I have seen a case of Vitamin D3 toxicity that did end in death (it was a higher dose but I do not know the exact toxic range). They will charge you a fee (I think $60) but they will be able to tell you whether to go to the emergency vet or not. They will also be available to consult with your vet as long as needed during treatment if needed.

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