Lethargy after Acetylsalicylic Acid in dogs

The FDA has received 58 reports of lethargy in dogs after Acetylsalicylic Acid. That is 37% of all reports for this medicine, compared with 11% across reports for all dog medicines, so it is reported unusually often with this medicine.

58Reports
74%Marked serious
10%Recovered
50%Died or euthanised
4 daysTypical onset
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How soon it started

Same day
10 18%
1–2 days
9 16%
3–7 days
19 35%
1–4 weeks
10 18%
Over a month
7 13%

How the animals did

Recovered
6 10%
Still unwell when reported
20 34%
Died
13 22%
Euthanised
16 28%
Not known
3 5.2%

Problems reported at the same time

31 53%
27 47%
17 29%
Pale mucous membrane
10 17%

Age of the animals

Under 1 year
5
1–3 years
9
4–7 years
13
8–11 years
26
12+ years
5

About this medicine

Type: medicine.

Questions owners ask

Can Acetylsalicylic Acid cause lethargy in dogs?
58 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 4 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 Acetylsalicylic Acid in dogs · Medicines most reported with lethargy