Tremors after Feline Core Vaccine in cats

78 reports to the FDA describe tremors in cats given Feline Core Vaccine. That is 5.0% of all reports for this medicine, compared with 2.6% across reports for all cat medicines, so it is reported unusually often with this medicine.

78Reports

64%Marked serious

37%Recovered

14%Died or euthanised

1 daysTypical onset

How soon it started

Same day

36 49%

1–2 days

12 16%

3–7 days

9 12%

1–4 weeks

12 16%

Over a month

5 6.8%

How the animals did

Recovered

28 36%

Recovered with lasting effects

1 1.3%

Still unwell when reported

22 28%

Died

3 3.8%

Euthanised

8 10%

Not known

16 21%

Problems reported at the same time

38 49%

32 41%

24 31%

18 23%

15 19%

13 17%

11 14%

11 14%

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 tremors 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).

Tremors with similar medicines

Tremors after Rabies Vaccine 133 reports · 5.1% of its reports
Tremors after Feline Leukemia Vaccine 42 reports · 5.3% of its reports
Tremors after Distemper-parvo Vaccine 20 reports · 7.2% of its reports

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