Vaccine Reactions

What to look for when your pet has been given vaccines

Vaccine Reactions
Dr. Shannon Holland

By Dr. Shannon Holland

15 Feb 2022

Vaccine Reactions are rare but they do occasionally occur. In very rare cases they can be life threatening and require immediate and urgent care by a veterinarian.

If your pet has ever had a vaccine reaction before it is important that you make your vet aware of this to ensure that the proper vaccines and medications are given. If there has been a significant vaccine reaction in your pets history it may be necessary to discontinue some or all vaccinations.

Most vaccine reactions will occur in 12 to 24 hours post vaccination.

Common or normal Symptoms after vaccinations. These generally do not require treatment but if you are concerned contact a veterinarian.

  • Pain or soreness at the vaccination site
  • Lethargy or being sleepier than usual
  • Sneezing after an intranasal vaccination

Vaccine Reactions that require immediate and urgent care by a veterinarian.

  • Vomiting or Diarrhea
  • Facial Swelling
  • Hives
  • Collapse
  • Difficulty breathing
  • Pale gums

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