Hyperphosphataemia after Firocoxib (Previcox) in dogs

325 reports to the FDA describe hyperphosphataemia in dogs given Firocoxib. That is 4.1% of all reports for this medicine, compared with 0.6% across reports for all dog medicines, so it is reported unusually often with this medicine.

325Reports
49%Marked serious
7.7%Recovered
40%Died or euthanised
5 daysTypical onset
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How soon it started

Same day
12 7.4%
1–2 days
25 15%
3–7 days
66 40%
1–4 weeks
32 20%
Over a month
28 17%

How the animals did

Recovered
24 7.4%
Recovered with lasting effects
1 0.3%
Still unwell when reported
45 14%
Died
88 27%
Euthanised
41 13%
Not known
126 39%

Problems reported at the same time

Age of the animals

Under 1 year
14
1–3 years
27
4–7 years
82
8–11 years
140
12+ years
59

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 hyperphosphataemia in dogs?
325 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).

Hyperphosphataemia with similar medicines

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