Itching / Allergies

Dosages for  (Zyrtec) for different weights

(FOR INFANTS 6 MONTHS AND OLDER ONLY)

Medicine Name: Diphenhydramine (Benadryl) May Give Every 11 lb to 16 lb, 7oz 16 lb, 8oz to 21 lb, 15oz 22 lb to 26 lb, 7oz 27 lb, 8oz to 32 lb, 15oz 33 lb to 37 lb, 7oz 38 lb, 8oz to 43 lb, 15oz 44 lb to 54 lb, 15oz 55 lb to 65 lb, 15oz 66 lb to 76 lb, 15oz 77 lb to 87 lb, 5oz 88 lb+
Children's Liquid Suspension 12.5mg/5mL 6-8 hours 1/2 tsp. or 2.5mL 3/4 tsp. or 3.75mL 1 tsp. or 5mL 1-1/4 tsp. or 6.25mL 1-1/2 tsp. or 7.5mL 1-3/4 tsp. or 8.75mL 2 tsp. or 10mL 2-1/2 tsp. 3 tsp. 3-1/2 tsp. 4 tsp.
Children's Chewable Tablets 12.5mg 6-8 hours - - 1 tab. 1 tab. 1 tab. 1 tab. 2 tab. 2 tab. 2 tab. 2 tab. 4 tab.
Children's Meltaway Strips 12.5mg 6-8 hours - - 1 melt 1 melt 1 melt 1 melt 2 melts 2 melts 2 melts 2 melts 4 melts

When to Use. Treatment of allergic reactions, nasal allergies, hives and itching.

Customized from Itching Allergies v0.1 7/8/2025

Dosages for Diphenhydramine (Benadryl) for different weights

(FOR INFANTS 6 MONTHS AND OLDER ONLY)

Medicine Name: Diphenhydramine (Benadryl) May Give Every 11 lb to 16 lb, 7oz 16 lb, 8oz to 21 lb, 15oz 22 lb to 26 lb, 7oz 27 lb, 8oz to 32 lb, 15oz 33 lb to 37 lb, 7oz 38 lb, 8oz to 43 lb, 15oz 44 lb to 54 lb, 15oz 55 lb to 65 lb, 15oz 66 lb to 76 lb, 15oz 77 lb to 87 lb, 5oz 88 lb+
Children's Liquid Suspension 12.5mg/5mL 6-8 hours 1/2 tsp. or 2.5mL 3/4 tsp. or 3.75mL 1 tsp. or 5mL 1-1/4 tsp. or 6.25mL 1-1/2 tsp. or 7.5mL 1-3/4 tsp. or 8.75mL 2 tsp. or 10mL 2-1/2 tsp. 3 tsp. 3-1/2 tsp. 4 tsp.
Children's Chewable Tablets 12.5mg 6-8 hours - - 1 tab. 1 tab. 1 tab. 1 tab. 2 tab. 2 tab. 2 tab. 2 tab. 4 tab.
Children's Meltaway Strips 12.5mg 6-8 hours - - 1 melt 1 melt 1 melt 1 melt 2 melts 2 melts 2 melts 2 melts 4 melts

When to Use. 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 causes most babies to be sleepy). For colds, not advised at any age. (Reason: no proven benefits). They should be not be given if under 4 years old. If under 6 years, don't give products with more than one ingredient in them. (Reason: FDA recommendations 10/2008).
  • DOSE. Find the child's weight in the top row of the dose table. Look below the correct weight for the dose based on the product you have.
  • MEASURE the DOSE. Syringes and droppers are more accurate than teaspoons. If possible, use the syringe or dropper that comes with the medicine. If not, you can get a med syringe at drug stores. If you use a teaspoon, it should be a measuring spoon. (Reason: regular spoons are not reliable.) Keep in mind 1 level teaspoon equals 5 mL and that ½ teaspoon equals 2.5 mL. 
  • ADULT DOSE. 50 mg
  • HOW OFTEN. Repeat every 6 hours as needed.
  • CHILDREN’S BENADRYL FASTMELTS. Each fastmelt tablet equals 12.5 mg. They are dosed the same as chewable tablets.

Customized from Itching Allergies v0.1 7/8/2025