Seizures after Firocoxib (Previcox) in dogs

The FDA has received 377 reports of seizures in dogs after Firocoxib. That is 4.7% of all reports for this medicine, compared with 4.4% across reports for all dog medicines.

377Reports
37%Marked serious
11%Recovered
25%Died or euthanised
3 daysTypical onset
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How soon it started

Same day
40 28%
1–2 days
26 18%
3–7 days
29 20%
1–4 weeks
25 17%
Over a month
23 16%

How the animals did

Recovered
41 11%
Recovered with lasting effects
2 0.5%
Still unwell when reported
29 7.7%
Died
76 20%
Euthanised
17 4.5%
Not known
212 56%

Problems reported at the same time

Age of the animals

Under 1 year
11
1–3 years
40
4–7 years
82
8–11 years
123
12+ years
104

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 seizures in dogs?
377 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 3 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).

Seizures with similar medicines

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