Lethargy after Lidocaine in dogs

The FDA has received 55 reports of lethargy in dogs after Lidocaine. That is 22% of all reports for this medicine, compared with 11% across reports for all dog medicines, so it is reported unusually often with this medicine.

55Reports
93%Marked serious
24%Recovered
42%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
9 19%
1–2 days
18 38%
3–7 days
7 15%
1–4 weeks
3 6.4%
Over a month
10 21%

How the animals did

Recovered
13 24%
Still unwell when reported
11 20%
Died
5 9.1%
Euthanised
18 33%
Not known
8 15%

Problems reported at the same time

36 65%
24 44%
21 38%
Neutrophilia
15 27%

Age of the animals

Under 1 year
1
1–3 years
15
4–7 years
15
8–11 years
19
12+ years
5

About this medicine

Type: medicine.

Questions owners ask

Can Lidocaine cause lethargy in dogs?
55 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).

Lethargy with similar medicines

All reported side effects of Lidocaine in dogs · Medicines most reported with lethargy