Behaviour change after Distemper-parvo Vaccine in dogs

296 reports to the FDA describe behaviour change in dogs given Distemper-parvo Vaccine. That is 4.6% of all reports for this medicine, compared with 2.5% across reports for all dog medicines, so it is reported unusually often with this medicine.

296Reports
52%Marked serious
26%Recovered
15%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
81 32%
1–2 days
57 22%
3–7 days
44 17%
1–4 weeks
23 8.9%
Over a month
52 20%

How the animals did

Recovered
67 23%
Recovered with lasting effects
10 3.4%
Still unwell when reported
113 38%
Died
21 7.1%
Euthanised
24 8.1%
Not known
61 21%

Problems reported at the same time

Age of the animals

Under 1 year
84
1–3 years
62
4–7 years
69
8–11 years
56
12+ years
21

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 Distemper-parvo Vaccine cause behaviour change in dogs?
296 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).

Behaviour change with similar medicines

All reported side effects of Distemper-parvo Vaccine in dogs · Medicines most reported with behaviour change