Elevated temperature after Feline Leukemia Vaccine in cats

27 reports to the FDA describe elevated temperature in cats given Feline Leukemia Vaccine. That is 3.4% of all reports for this medicine, compared with 0.4% across reports for all cat medicines, so it is reported unusually often with this medicine.

27Reports

48%Marked serious

41%Recovered

3.7%Died or euthanised

2 daysTypical onset

How soon it started

Same day

6 26%

1–2 days

8 35%

3–7 days

3 13%

1–4 weeks

2 8.7%

Over a month

4 17%

How the animals did

Recovered

11 41%

Still unwell when reported

11 41%

Euthanised

1 3.7%

Not known

4 15%

Problems reported at the same time

16 59%

15 56%

9 33%

8 30%

5 19%

4 15%

Injection site reaction

4 15%

Wobbliness (ataxia)

4 15%

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 Leukemia Vaccine cause elevated temperature in cats?: 27 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 2 days 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).

Elevated temperature with similar medicines

Elevated temperature after Rabies Vaccine 50 reports · 1.9% of its reports
Elevated temperature after Feline Core Vaccine 30 reports · 1.9% of its reports

All reported side effects of Feline Leukemia Vaccine in cats · Medicines most reported with elevated temperature