Blood problems after Firocoxib (Previcox) in dogs

The FDA has received 583 reports of blood problems in dogs after Firocoxib. That is 7.3% of all reports for this medicine, compared with 1.8% across reports for all dog medicines, so it is reported unusually often with this medicine.

583Reports
30%Marked serious
5.7%Recovered
32%Died or euthanised
8 daysTypical onset
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

How soon it started

Same day
10 6.1%
1–2 days
21 13%
3–7 days
45 27%
1–4 weeks
45 27%
Over a month
44 27%

How the animals did

Recovered
31 5.3%
Recovered with lasting effects
2 0.3%
Still unwell when reported
54 9.3%
Died
146 25%
Euthanised
40 6.9%
Not known
310 53%

Problems reported at the same time

Age of the animals

Under 1 year
18
1–3 years
44
4–7 years
128
8–11 years
240
12+ years
142

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 blood problems in dogs?
583 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 8 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).

Blood problems with similar medicines

All reported side effects of Firocoxib in dogs · Medicines most reported with blood problems