[Anonymous]

Exactly, the same reason you should never give a dog liquid Benadryl (childrens)
•Diphenhydramine Hydrochloride, 6.25 mg/5 mL

Non-medicinal ingredients:
•Benzoate
•Carboxymethylcellulose
•Citrate
•Flavours
•Glycerin
•Saccharin sodium†
•Sorbitol†
•Contains 7.83 Kcal/5 mL
•Diphenhydramine Hydrochloride, 6.25 mg/5 mL

Sorbitol, Saccharin Sodium, Xilytol are similar ingredients and should not be given to dogs.