Oxybendazole side effects in horses

111 reports sent to the FDA between 2012 and 2025 involve Oxybendazole in horses. The most reported problems were colic, diarrhea, loss of appetite. 29% were marked serious.

111Reports
29%Marked serious
88%Only medicine involved
57%Recovered
5.4%Died or euthanised
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About this medicine

Type: medicine.

Most reported side effects

54 49%
45 41%
23 21%
Loose stool
17 15%
Breathing problems
6 5.4%
Tachycardia
6 5.4%
Fever
6 5.4%
Decreased activity
5 4.5%
Allergic reaction
4 3.6%
Swelling
3 2.7%
Intestinal disorder
3 2.7%
Abdominal discomfort
3 2.7%
Distension of abdomen
2 1.8%
Foaming at the mouth
2 1.8%

Share = percentage of this medicine's reports that mention the problem. One report can list several problems.

Reports that it didn't work

Some reports are about the medicine not working (for example a horse still getting fleas or heartworm), not about a side effect.

Didn't stop worms
8 7.2%
Didn't work as expected
4 3.6%

How soon problems started

Same day
32 30%
1–2 days
63 59%
3–7 days
1 0.9%
1–4 weeks
3 2.8%
Over a month
8 7.5%

Time from the first dose to the first sign, where both dates were reported (107 reports).

How the animals did

Recovered
62 56%
Recovered with lasting effects
1 0.9%
Still unwell when reported
13 12%
Died
2 1.8%
Euthanised
4 3.6%
Not known
29 26%

Breeds named most often

Popular breeds appear more often because there are more of them.

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