Dilated pupils after Prednisone in dogs

26 reports to the FDA describe dilated pupils in dogs given Prednisone. That is 0.3% of all reports for this medicine, compared with 0.1% across reports for all dog medicines, so it is reported unusually often with this medicine.

26Reports

65%Marked serious

23%Recovered

27%Died or euthanised

2 daysTypical onset

How soon it started

Same day

9 45%

1–2 days

3 15%

3–7 days

1 5.0%

1–4 weeks

2 10%

Over a month

5 25%

How the animals did

Recovered

5 19%

Recovered with lasting effects

1 3.8%

Still unwell when reported

8 31%

Died

5 19%

Euthanised

2 7.7%

Not known

5 19%

Problems reported at the same time

12 46%

9 35%

7 27%

7 27%

6 23%

6 23%

6 23%

Restlessness or agitation

5 19%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Prednisone reduces inflammation and immune activity.

Steroids commonly cause increased thirst, urination and appetite, especially at higher doses.

Questions owners ask

Can Prednisone cause dilated pupils in dogs?: 26 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 2 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).

All reported side effects of Prednisone in dogs · Medicines most reported with dilated pupils