Blood in faeces after Leptospirosis Vaccine in dogs

The FDA has received 48 reports of blood in faeces in dogs after Leptospirosis Vaccine. That is 0.6% 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.

48Reports

77%Marked serious

27%Recovered

21%Died or euthanised

1 daysTypical onset

How soon it started

Same day

20 49%

1–2 days

7 17%

3–7 days

4 9.8%

1–4 weeks

4 9.8%

Over a month

6 15%

How the animals did

Recovered

13 27%

Still unwell when reported

23 48%

Died

4 8.3%

Euthanised

6 13%

Not known

2 4.2%

Problems reported at the same time

34 71%

20 42%

19 40%

17 35%

11 23%

10 21%

8 17%

Abnormal radiograph finding

7 15%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

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 blood in faeces in dogs?: 48 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 1 day 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).

Blood in faeces with similar medicines

Blood in faeces after Rabies Vaccine 60 reports · 0.6% of its reports
Blood in faeces after Bordetella Vaccine 51 reports · 0.5% of its reports
Blood in faeces after Distemper-parvo Vaccine 42 reports · 0.6% of its reports

All reported side effects of Leptospirosis Vaccine in dogs · Medicines most reported with blood in faeces