Allergic reaction after Dexamethasone in cats

71 reports to the FDA describe allergic reaction in cats given Dexamethasone. That is 9.3% of all reports for this medicine, compared with 0.9% across reports for all cat medicines, so it is reported unusually often with this medicine.

71Reports

93%Marked serious

23%Recovered

42%Died or euthanised

Same dayTypical onset

How soon it started

Same day

57 86%

1–2 days

4 6.1%

3–7 days

1 1.5%

1–4 weeks

3 4.5%

Over a month

1 1.5%

How the animals did

Recovered

16 23%

Still unwell when reported

22 31%

Died

15 21%

Euthanised

15 21%

Not known

3 4.2%

Problems reported at the same time

41 58%

38 54%

30 42%

21 30%

19 27%

17 24%

16 23%

15 21%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Dexamethasone reduces inflammation and immune activity.

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

Questions owners ask

Can Dexamethasone cause allergic reaction in cats?: 71 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 the same day 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).

Allergic reaction with similar medicines

Allergic reaction after Prednisolone 26 reports · 2.1% of its reports

All reported side effects of Dexamethasone in cats · Medicines most reported with allergic reaction