Ivermectin + Pyrantel (Heartgard Plus) side effects in Chow Chows

200 FDA reports involve Ivermectin + Pyrantel in a Chow Chow. These are the problems they describe.

Didn't prevent heartworm
117 59%
Didn't work as expected
23 12%
Didn't stop worms
23 12%
Cardiac disorder
22 11%
Vomiting
20 10%
Lethargy
11 5.5%
Itching
10 5.0%
Death
10 5.0%
Diarrhea
8 4.0%
Digestive tract disorder
6 3.0%
Breathing problems
5 2.5%
Loose stool
4 2.0%

All reports for Ivermectin + Pyrantel in dogs