Answers by TheMediTary.Com - Last updated: 13-Jul-2023
Children’s Benadryl Allergy Liquid (diphenhydramine HCl 12.5 mg/5 mL) should not be used in children between the ages of 2 and 5 years unless directed by a doctor.
For additional information see Diphenhydramine Dosage or Benadryl Dosage Charts for Infants and Children.