Wobbliness (ataxia) after Leptospirosis Vaccine in dogs

293 reports to the FDA describe wobbliness (ataxia) in dogs given Leptospirosis Vaccine. That is 3.7% of all reports for this medicine, compared with 2.6% across reports for all dog medicines.

293Reports
72%Marked serious
24%Recovered
17%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
93 35%
1–2 days
55 21%
3–7 days
40 15%
1–4 weeks
46 17%
Over a month
32 12%

How the animals did

Recovered
68 23%
Recovered with lasting effects
1 0.3%
Still unwell when reported
139 47%
Died
20 6.8%
Euthanised
30 10%
Not known
35 12%

Problems reported at the same time

Vomiting
103 35%
Lethargy
101 34%
Loss of appetite
72 25%
Tremors
61 21%
Death
49 17%
Weakness
45 15%
Allergic reaction
44 15%
Diarrhea
41 14%

Age of the animals

Under 1 year
48
1–3 years
76
4–7 years
54
8–11 years
55
12+ years
57

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 wobbliness (ataxia) in dogs?
293 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).

Wobbliness (ataxia) with similar medicines

All reported side effects of Leptospirosis Vaccine in dogs · Medicines most reported with wobbliness (ataxia)