Accidental exposure after Monensin in horses

112 reports to the FDA describe accidental exposure in horses given Monensin. That is 67% of all reports for this medicine, compared with 2.8% across reports for all horse medicines, so it is reported unusually often with this medicine.

112Reports
0.9%Marked serious
0.9%Recovered
58%Died or euthanised
–Typical onset
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How the animals did

Recovered
1 0.9%
Died
65 58%
Not known
46 41%

Problems reported at the same time

Death
67 60%
Abdominal pain
22 20%
No sign
20 18%
Loss of appetite
17 15%
Recumbency
13 12%
Lethargy
13 12%
Inappropriate preparation of medication
12 11%
Diarrhea
8 7.1%

Age of the animals

Under 1 year
0
1–3 years
6
4–7 years
10
8–11 years
6
12+ years
7

About this medicine

Type: medicine.

Questions owners ask

Can Monensin cause accidental exposure in horses?
112 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.
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).

All reported side effects of Monensin in horses · Medicines most reported with accidental exposure