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Allergic reaction to vaccines.

Species: Dog
Breed: Pug
Age: 5-8 years
He just got all his shots this morning and has been vomiting since and his face is now swollen. My other pug had the swelling happen when she had her shots, but she didn't puke. Can I give him 25 mg of benadryl to take down the swelling? I would like to but I don't want his throat to swell up or him to stop breathing or something. Please help. Thank you.


Online vet, Dr. Marie

Dr. Marie replied:

Dogs certainly can have an allergic reaction to vaccines.

If this is a mild reaction then most vets will recommend giving benadryl. The dose is 1 mg/lb. So, if your dog weighed 25 pounds then one tablet would be good.

If you are seeing any of the following symptoms then you should head back to the vet immediately:
  • Pale gums

  • Difficulty breathing

  • If the dog is extremely uncomfortable



Some allergic reactions can be life threatening, so if you are unsure then it is best to call your vet right away.

Dr. Marie.

---This question was asked in our Ask A Vet For Free section.---


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Disclaimer: Although Dr. Marie is a qualified veterinarian, the information found on this site is not meant to replace the advice of your own veterinarian. AskAVetQuestion.com and Dr. Marie do not accept any responsibility for any loss, damage, injury, death, or disease which may arise from reliance on information contained on this site. Do not use information found on this site for diagnosing or treating your pet. Anything you read here is for information only.

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Dr. MarieDr. Marie is a veterinarian who practices in a busy animal hospital in Ottawa, Ontario. She created Ask A Vet Question as a resource for good, accurate veterinary advice online. Dr. Marie treats dogs, cats, hamsters, guinea pigs, and rats. She has been a vet since 1999.

Is an online vet visit just as good as a trip to your veterinarian? No! But, many times, asking an online veterinarian a question can help save you money. While Dr. Marie can't officially diagnose your pet or prescribe medications, she can often advise you on whether a vet visit is necessary. You can also ask Dr. Marie for a second opinion on your pet's condition.