Child’s Weight (pounds) 20-24 25-37  38-49  50-99  100+   lbs 
 Liquid 12.5 mg/1 teaspoon (tsp) 3/4 1 1 1/2 2 tsp
 Liquid 12.5 mg/5 milliliters (ml) 4 5 7.5 10 ml
 Chewable 12.5 mg 1 1 1/2 2 4 tablets
 Tablets 25 mg 1/2 1/2 1 2 tablets
 Capsules 25 mg 1 2 caps

Indications: Treatment of allergic reactions, nasal allergies, hives and itching.

Table Notes:
AGE LIMITS: For allergies, don’t use under 1 year of age (Reason: it’s a sedative). For colds, not recommended at any age (Reason: no proven benefits) and should be avoided if under 4 years old. Avoid multi-ingredient products in children under 6 years of age (Reason: FDA recommendations 10/2008).
DOSAGE: Determine by finding child’s weight in the top row of the dosage table
MEASURING the DOSAGE: Syringes and droppers are more accurate than teaspoons. If possible, use the syringe or dropper that comes with the medication. If you use a teaspoon, it should be a measuring spoon. Regular spoons are not reliable. Also, remember that 1 level teaspoon equals 5 ml and that ½ teaspoon equals 2.5 ml.
FREQUENCY: Repeat every 6 hours as needed
CHILDREN’S BENADRYL FASTMELTS: Each fastmelt tablet contains the equivalent of 12.5 mg of Diphenhydramine HCL and dosed the same as chewable tablets

Last Updated
My Child Is Sick! Expert Advice for Managing Common Illnesses and Injuries (Copyright © 2011 Barton D. Schmitt, MD, FAAP)