Dosage:
Adults and Children 12 years and older: one tablet at bedtime
Children under 12 years: ask a doctor
Dogs: 25-50 mg/dog, every 8 hours orally, or 2.2 mg/kg every 8-12 hours orally
Cats: 2-4 mg/kg, every 6-8 hours orally
How this medicine should be used:
Diphenhydramine is FDA approved for external use in dogs and cats. Diphenhydramine oral and injectable is not FDA approved for use in veterinary medicine; however, it is a commonly accepted practice to use this medication in dogs and cats. The usual dose in dogs and cats is 0.5-2mg/pound every 8-12 hours. The slow release capsule should not be mixed or dissolved in food. Do not use diphenhydramine found in combination products containing sinus or cold medicine.
What are the side effects:
Side effects of diphenhydramine include drowsiness, dry mouth and urinary retention. Rarely, vomiting and diarrhea can occur.
