What to Expect After Your Pet’s Vaccination

Pets may experience mild side effects after receiving a vaccine, typically within hours of the vaccination. If these side effects persist for more than a day or two, or if your pet is in significant discomfort, please contact your veterinarian.

What to Look Out for

Common Side Effects:

  • Sleepiness or lethargy
  • Shaking
  • Soreness or stiffness at the injection site
  • Reduced appetite

Less Common but Concerning Side Effects:

  • Swelling of the face
  • Persistent itching
  • Ongoing vomiting and/or diarrhea
  • Collapse

Home Care Tips:

  • Monitor your pet closely for the first 24–48 hours.
  • Offer soft, warm food if your pet has a decreased appetite.
  • Ensure your pet has a quiet, comfortable place to rest.

Medication Guidance:

  • Side effects typically resolve within 24–48 hours after vaccination
  • Provide soft, warm food to help stimulate appetite if your pet is not eating well
  • Benadryl may be used to help relieve mild symptoms (as directed)

Claritin (for dogs only):

  • Small pets: 5 mg orally once every 24 hours
  • Medium pets: 10 mg orally once every 24 hours
  • Large pets: 15 mg orally once every 24 hours
  • Home Care After Vaccinations | View PDF

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