Loose stool after Leptospirosis Vaccine in dogs

145 reports to the FDA describe loose stool in dogs given Leptospirosis Vaccine. That is 1.8% 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.

145Reports
59%Marked serious
28%Recovered
18%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
46 38%
1–2 days
18 15%
3–7 days
10 8.3%
1–4 weeks
15 13%
Over a month
31 26%

How the animals did

Recovered
41 28%
Still unwell when reported
52 36%
Died
8 5.5%
Euthanised
18 12%
Not known
26 18%

Problems reported at the same time

Age of the animals

Under 1 year
30
1–3 years
42
4–7 years
35
8–11 years
21
12+ years
15

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 Leptospirosis Vaccine cause loose stool in dogs?
145 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 Leptospirosis Vaccine in dogs · Medicines most reported with loose stool