Codeine side effects in dogs

75 reports sent to the FDA between 2012 and 2026 involve Codeine in dogs. The most reported problems were loss of appetite, liver problems, vomiting. 63% were marked serious.

75Reports
63%Marked serious
0.0%Only medicine involved
15%Recovered
28%Died or euthanised
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About this medicine

Type: medicine.

Most reported side effects

20 27%
Lethargy
14 19%
Abnormal ultrasound finding
13 17%
Swelling
12 16%
Vocalising
12 16%
Diarrhea
12 16%
Kidney problems
12 16%
Breathing problems
9 12%
Tremors
9 12%
Pain
9 12%
Blood problems
8 11%
Restlessness or agitation
7 9.3%
Monocytosis
7 9.3%

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 dog still getting fleas or heartworm), not about a side effect.

Didn't work as expected
13 17%

How soon problems started

Same day
9 15%
1–2 days
14 23%
3–7 days
4 6.7%
1–4 weeks
15 25%
Over a month
18 30%

Time from the first dose to the first sign, where both dates were reported (60 reports).

How the animals did

Recovered
10 13%
Recovered with lasting effects
1 1.3%
Still unwell when reported
26 35%
Died
7 9.3%
Euthanised
14 19%
Not known
17 23%

Breeds named most often

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

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