Ivermectin (Heartgard) side effects in Thoroughbreds

55 FDA reports involve Ivermectin in a Thoroughbred. These are the problems they describe.

Abdominal pain
12 22%
Swelling
11 20%
Lethargy
10 18%
Death
10 18%
Loss of appetite
8 15%
Diarrhea
8 15%
Recumbency
7 13%
Didn't stop worms
6 11%
Fever
6 11%
Restlessness or agitation
5 9.1%
Didn't work as expected
5 9.1%
Hyperhidrosis
4 7.3%

All reports for Ivermectin in horses