Abnormal cytology after Lyme Vaccine in dogs

30 reports to the FDA describe abnormal cytology in dogs given Lyme Vaccine. That is 0.4% of all reports for this medicine, compared with 0.2% across reports for all dog medicines, so it is reported unusually often with this medicine.

30Reports
53%Marked serious
0.0%Recovered
6.7%Died or euthanised
13 daysTypical onset
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

How soon it started

Same day
4 17%
1–2 days
4 17%
3–7 days
3 13%
1–4 weeks
3 13%
Over a month
9 39%

How the animals did

Still unwell when reported
21 70%
Died
1 3.3%
Euthanised
1 3.3%
Not known
7 23%

Problems reported at the same time

Age of the animals

Under 1 year
6
1–3 years
4
4–7 years
9
8–11 years
10
12+ years
1

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 Lyme Vaccine cause abnormal cytology in dogs?
30 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 13 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).

Abnormal cytology with similar medicines

All reported side effects of Lyme Vaccine in dogs · Medicines most reported with abnormal cytology