Any updates?   
The adverse reactions for Heartguard are as follows:   
ADVERSE REACTIONS: 
In clinical field trials with HEARTGARD Plus, vomiting or diarrhea within 24 hours of dosing was rarely observed (1.1% of administered doses). The following adverse reactions have been reported following the use of HEARTGARD: Depression/lethargy, vomiting, anorexia, diarrhea, mydriasis, ataxia, staggering, convulsions and hypersalivation.   
mydriasis is severe dilation of the pupils 
ataxia is uncoordinated movements of the limbs caused by a brain inflammation     |