Loose stool after Distemper-parvo Vaccine in dogs

The FDA has received 124 reports of loose stool in dogs after Distemper-parvo Vaccine. That is 1.9% of all reports for this medicine, compared with 0.9% across reports for all dog medicines, so it is reported unusually often with this medicine.

124Reports
44%Marked serious
27%Recovered
13%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
29 27%
1–2 days
33 30%
3–7 days
11 10%
1–4 weeks
16 15%
Over a month
20 18%

How the animals did

Recovered
33 27%
Recovered with lasting effects
1 0.8%
Still unwell when reported
53 43%
Died
9 7.3%
Euthanised
7 5.6%
Not known
21 17%

Problems reported at the same time

Age of the animals

Under 1 year
58
1–3 years
24
4–7 years
24
8–11 years
13
12+ years
3

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 loose stool in dogs?
124 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).

Loose stool with similar medicines

All reported side effects of Distemper-parvo Vaccine in dogs · Medicines most reported with loose stool