Behaviour change after Firocoxib (Previcox) in dogs

206 reports to the FDA describe behaviour change in dogs given Firocoxib. That is 2.6% of all reports for this medicine, compared with 2.5% across reports for all dog medicines.

206Reports
45%Marked serious
17%Recovered
17%Died or euthanised
5 daysTypical onset
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How soon it started

Same day
27 26%
1–2 days
11 11%
3–7 days
23 22%
1–4 weeks
13 13%
Over a month
29 28%

How the animals did

Recovered
31 15%
Recovered with lasting effects
3 1.5%
Still unwell when reported
15 7.3%
Died
22 11%
Euthanised
13 6.3%
Not known
122 59%

Problems reported at the same time

Age of the animals

Under 1 year
5
1–3 years
28
4–7 years
43
8–11 years
73
12+ years
50

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 behaviour change in dogs?
206 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).

Behaviour change with similar medicines

All reported side effects of Firocoxib in dogs · Medicines most reported with behaviour change