Will Piriton Make My Dog Drowsy?

Will Piriton Make My Dog Drowsy? Drowsiness: Piriton is an antihistamine, so it can make your dogs drowsy in the same way it does humans. Before giving it to your pup, make sure the dosage is correct. Do dog antihistamines make them sleepy? Side effects of antihistamines in dogs include drowsiness and lethargy. Some dogs