Hiding after Feline Core Vaccine in cats

The FDA has received 78 reports of hiding in cats after Feline Core Vaccine. That is 5.0% of all reports for this medicine, compared with 2.4% across reports for all cat medicines, so it is reported unusually often with this medicine.

78Reports

67%Marked serious

31%Recovered

22%Died or euthanised

1 daysTypical onset

How soon it started

Same day

27 37%

1–2 days

21 29%

3–7 days

3 4.1%

1–4 weeks

17 23%

Over a month

5 6.8%

How the animals did

Recovered

24 31%

Still unwell when reported

27 35%

Died

7 9.0%

Euthanised

10 13%

Not known

10 13%

Problems reported at the same time

60 77%

47 60%

33 42%

29 37%

17 22%

15 19%

14 18%

14 18%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Type: vaccine.

Mild, short-lived lethargy, soreness or a small lump at the injection site are the most commonly reported vaccine reactions.

Questions owners ask

Can Feline Core Vaccine cause hiding in cats?: 78 reports link the two, but a report alone does not prove the medicine was the cause: other illnesses, other medicines or coincidence can be involved. Your vet can judge it for your animal.
How soon after a dose was it reported?: In half of the reports with dates, it started within 1 day of the first dose.
What should I do?: Don't give another dose until you've spoken to your vet, and keep the packaging so you can tell them the product and dose. Your vet can also report it to the FDA (or you can, through the manufacturer or FDA form 1932a).

Hiding with similar medicines

Hiding after Rabies Vaccine 152 reports · 5.9% of its reports
Hiding after Feline Leukemia Vaccine 52 reports · 6.5% of its reports

All reported side effects of Feline Core Vaccine in cats · Medicines most reported with hiding