Colic after Monensin Sodium in horses

The FDA has received 20 reports of colic in horses after Monensin Sodium. That is 17% of all reports for this medicine, compared with 4.2% across reports for all horse medicines, so it is reported unusually often with this medicine.

20Reports
95%Marked serious
5.0%Recovered
85%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
9 53%
1–2 days
2 12%
3–7 days
0 0.0%
1–4 weeks
1 5.9%
Over a month
5 29%

How the animals did

Recovered
1 5.0%
Still unwell when reported
1 5.0%
Died
16 80%
Euthanised
1 5.0%
Not known
1 5.0%

Problems reported at the same time

17 85%
Accidental exposure
4 20%
Labeled drug-species interaction
2 10%
Lethargy
2 10%
Loss of appetite
1 5.0%
Tense abdomen
1 5.0%
Muscle wasting
1 5.0%
Unthrifty
1 5.0%

Age of the animals

Under 1 year
0
1–3 years
0
4–7 years
2
8–11 years
2
12+ years
2

About this medicine

Type: medicine.

Questions owners ask

Can Monensin Sodium cause colic in horses?
20 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 the same day 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).

Colic with similar medicines

All reported side effects of Monensin Sodium in horses · Medicines most reported with colic