Itching after Leptospirosis Vaccine in dogs

The FDA has received 524 reports of itching in dogs after Leptospirosis Vaccine. That is 6.5% of all reports for this medicine, compared with 4.3% across reports for all dog medicines, so it is reported unusually often with this medicine.

524Reports

56%Marked serious

37%Recovered

4.6%Died or euthanised

Same dayTypical onset

How soon it started

Same day

267 56%

1–2 days

71 15%

3–7 days

26 5.5%

1–4 weeks

51 11%

Over a month

61 13%

How the animals did

Recovered

185 35%

Recovered with lasting effects

8 1.5%

Still unwell when reported

218 42%

Died

9 1.7%

Euthanised

15 2.9%

Not known

89 17%

Problems reported at the same time

204 39%

200 38%

190 36%

103 20%

72 14%

63 12%

61 12%

52 9.9%

Age of the animals

Under 1 year

1–3 years

223

4–7 years

129

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 itching in dogs?: 524 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 the same 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).

Itching with similar medicines

Itching after Rabies Vaccine 808 reports · 8.2% of its reports
Itching after Bordetella Vaccine 673 reports · 7.2% of its reports
Itching after Lyme Vaccine 149 reports · 2.1% of its reports
Itching after Distemper-parvo Vaccine 470 reports · 7.3% of its reports

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