Lidocaine side effects in cats

136 reports sent to the FDA between 2011 and 2026 involve Lidocaine in cats. The most reported problems were loss of appetite, behaviour change, fever. 46% were marked serious, and where it was recorded, signs eased after stopping the medicine in 100% of cases.

136Reports
46%Marked serious
1.5%Only medicine involved
26%Recovered
17%Died or euthanised
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About this medicine

Type: medicine.

Most reported side effects

Fever
19 14%
Restlessness or agitation
19 14%
Lethargy
16 12%
Dysphoria
14 10%
Breathing problems
13 9.6%
Kidney problems
13 9.6%
Itching
12 8.8%
Hair loss
11 8.1%
Swelling
11 8.1%
Vomiting
9 6.6%
Weight loss
9 6.6%
Not sleeping
9 6.6%
Vocalising
8 5.9%

Share = percentage of this medicine's reports that mention the problem. One report can list several problems.

Reports that it didn't work

Some reports are about the medicine not working (for example a cat still getting fleas or heartworm), not about a side effect.

Didn't work as expected
3 2.2%

How soon problems started

Same day
73 57%
1–2 days
39 30%
3–7 days
8 6.3%
1–4 weeks
4 3.1%
Over a month
4 3.1%

Time from the first dose to the first sign, where both dates were reported (128 reports).

How the animals did

Recovered
36 26%
Still unwell when reported
48 35%
Died
18 13%
Euthanised
5 3.7%
Not known
29 21%

Breeds named most often

Popular breeds appear more often because there are more of them.

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