Diphenhydramine side effects in Domestic Longhairs

34 FDA reports involve Diphenhydramine in a Domestic Longhair. These are the problems they describe.

Death
11 32%
Loss of appetite
10 29%
Breathing problems
8 24%
Lethargy
8 24%
Behaviour change
6 18%
Fever
6 18%
Allergic reaction
5 15%
Vomiting
5 15%
Dilated pupils
4 12%
Application site reaction
4 12%
Itching
4 12%
Tachycardia
4 12%

All reports for Diphenhydramine in cats