Excessive urination after Flunixin Meglumine in horses

The FDA has received 21 reports of excessive urination in horses after Flunixin Meglumine. That is 3.4% of all reports for this medicine, compared with 0.7% across reports for all horse medicines, so it is reported unusually often with this medicine.

21Reports

86%Marked serious

29%Recovered

9.5%Died or euthanised

2 daysTypical onset

How soon it started

Same day

2 14%

1–2 days

7 50%

3–7 days

4 29%

1–4 weeks

1 7.1%

Over a month

0 0.0%

How the animals did

Recovered

5 24%

Recovered with lasting effects

1 4.8%

Still unwell when reported

2 9.5%

Euthanised

2 9.5%

Not known

11 52%

Problems reported at the same time

Excessive thirst

20 95%

Kidney problems

13 62%

Hypercalcaemia

8 38%

Lethargy

8 38%

Loss of appetite

8 38%

Hyperkalaemia

7 33%

Hypochloraemia

6 29%

Swelling

5 24%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Type: medicine.

Questions owners ask

Can Flunixin Meglumine cause excessive urination in horses?: 21 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 2 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).

Excessive urination with similar medicines

Excessive urination after Pergolide 20 reports · 1.6% of its reports
Excessive urination after Clodronate Disodium 67 reports · 22% of its reports

All reported side effects of Flunixin Meglumine in horses · Medicines most reported with excessive urination