Application site reaction after Feline Leukemia Vaccine in cats

The FDA has received 39 reports of application site reaction in cats after Feline Leukemia Vaccine. That is 4.9% of all reports for this medicine, compared with 8.1% across reports for all cat medicines, so it is reported less often than average with this medicine.

39Reports
67%Marked serious
46%Recovered
0.0%Died or euthanised
4 daysTypical onset
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How soon it started

Same day
5 14%
1–2 days
12 32%
3–7 days
11 30%
1–4 weeks
6 16%
Over a month
3 8.1%

How the animals did

Recovered
18 46%
Still unwell when reported
6 15%
Not known
15 38%

Problems reported at the same time

Hair loss
29 74%
Itching
13 33%
Skin redness
9 23%
Lethargy
6 15%
Skin rash or irritation
4 10%
Vomiting
4 10%
Behaviour change
3 7.7%
Loss of appetite
3 7.7%

Age of the animals

Under 1 year
5
1–3 years
14
4–7 years
14
8–11 years
5
12+ years
0

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 application site reaction in cats?
39 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 4 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).

Application site reaction with similar medicines

All reported side effects of Feline Leukemia Vaccine in cats · Medicines most reported with application site reaction