Allergic reaction after Firocoxib (Previcox) in horses

37 reports to the FDA describe allergic reaction in horses given Firocoxib. That is 7.4% of all reports for this medicine, compared with 7.5% across reports for all horse medicines.

37Reports

38%Marked serious

41%Recovered

14%Died or euthanised

5 daysTypical onset

How soon it started

Same day

6 29%

1–2 days

2 9.5%

3–7 days

3 14%

1–4 weeks

5 24%

Over a month

5 24%

How the animals did

Recovered

15 41%

Still unwell when reported

2 5.4%

Died

2 5.4%

Euthanised

3 8.1%

Not known

15 41%

Problems reported at the same time

Swelling

13 35%

Itching

10 27%

Death

5 14%

Restlessness or agitation

5 14%

Skin rash or irritation

4 11%

Pacing

3 8.1%

Colic

3 8.1%

Behaviour change

3 8.1%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Firocoxib relieves pain and inflammation from arthritis.

Products with this ingredient include Previcox. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

NSAIDs can affect the stomach, liver and kidneys. Vets usually recommend blood tests before and during long-term use.

Questions owners ask

Can Firocoxib cause allergic reaction in horses?: 37 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 5 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 Firocoxib in horses · Medicines most reported with allergic reaction