Rimadyl side effects in dogs

52 reports sent to the FDA between 2011 and 2025 involve Rimadyl in dogs. The most reported problems were loss of appetite, seizures, vomiting. 71% were marked serious.

52Reports
71%Marked serious
0.0%Only medicine involved
35%Recovered
15%Died or euthanised
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About this medicine

Type: medicine.

Most reported side effects

Loss of appetite
14 27%
Seizures
11 21%
Vomiting
11 21%
Liver problems
10 19%
Lethargy
9 17%
Pain
8 15%
Wobbliness (ataxia)
5 9.6%
Weight loss
4 7.7%
Arthritis
4 7.7%
Breathing problems
4 7.7%
Kidney problems
4 7.7%
Itching
4 7.7%
Diarrhea
3 5.8%
Hyperkalaemia
3 5.8%
Weight gain
3 5.8%

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
2 3.8%
Didn't stop ticks
1 1.9%

How soon problems started

Same day
5 16%
1–2 days
4 13%
3–7 days
1 3.1%
1–4 weeks
5 16%
Over a month
17 53%

Time from the first dose to the first sign, where both dates were reported (32 reports).

How the animals did

Recovered
16 31%
Recovered with lasting effects
2 3.8%
Still unwell when reported
10 19%
Died
4 7.7%
Euthanised
4 7.7%
Not known
16 31%

Breeds named most often

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

Other medicines for dogs