Aspirin side effects in dogs

176 reports sent to the FDA between 2001 and 2026 involve Aspirin in dogs. The most reported problems were vomiting, loss of appetite, lethargy. 55% were marked serious.

176Reports
55%Marked serious
2.8%Only medicine involved
29%Recovered
28%Died or euthanised
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About this medicine

Type: medicine.

Most reported side effects

66 38%
42 24%
34 19%
Weakness
18 10%
Seizures
18 10%
Weight loss
16 9.1%
Blood problems
15 8.5%
Excessive thirst
13 7.4%
Tremors
12 6.8%
Excessive urination
11 6.3%
Abnormal radiograph finding
10 5.7%

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
17 9.7%
Didn't stop fleas
8 4.5%
Didn't stop worms
2 1.1%
Didn't prevent heartworm
1 0.6%
Didn't stop mites
1 0.6%

How soon problems started

Same day
16 14%
1–2 days
12 10%
3–7 days
8 7.0%
1–4 weeks
18 16%
Over a month
61 53%

Time from the first dose to the first sign, where both dates were reported (115 reports).

How the animals did

Recovered
36 20%
Recovered with lasting effects
15 8.5%
Still unwell when reported
34 19%
Died
17 9.7%
Euthanised
33 19%
Not known
41 23%

Breeds named most often

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

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