Itching / Allergies
Dosages for cetirizine (Zyrtec) & loratadine (Claritin) for different ages
| Medicine Name: cetirizine (Zyrtec) or loratadine (Claritin) | May Give Every | 6-23 months* | 2-5 years | 6+ years |
|---|---|---|---|---|
| Liquid 1 mg/1 milliliter (mL) | 24 hours | 2.5 mL (1/2 tsp.)* | 2.5-5 mL (1/2-1 tsp.) | 5-10 mL (1-2 tsp.) |
| 5 mg Tablet or Chewable | 24 hours | - | 1 tab. | 1-2 tab. |
| 10 mg Tablet, Chewable, or ODT | 24 hours | - | - | 1 tab. |
When to Use. Treatment of allergic reactions, nasal allergies, hives and itching. Not advised to use for a cold (Reason: no proven benefits).
Table Notes:
- AGE LIMITS. For allergies, don't use under 6 months of age. *Talk with your child's doctor before giving medications to children under the age of 2.*
- DOSE. Find the child's age in the top row of the dose table. Look below the correct age 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.
- HOW OFTEN. Repeat every 24 hours as needed. Could also give half the max dose every 12 hours if preferred.
Customized from Itching Allergies v0.1 7/8/2025
Dosages for fexofenadine (Allegra) for different ages
| Medicine Name: fexofenadine (Allegra) | May Give Every | 2-6 years | 6-12 years | 12+ years |
|---|---|---|---|---|
| Liquid 30 mg/5 milliliters (mL) | 12 hours | 5 mL (1 tsp.) | 5 mL (1 tsp.) | - |
| 30 mg Chewable | 12 hours | - | 1 tab. | - |
| 60 mg Tablet | 12 hours | - | - | 1 tab.* |
When to Use. Treatment of allergic reactions, nasal allergies, hives and itching. Not advised to use for a cold (Reason: no proven benefits).
Table Notes:
- AGE LIMITS. For allergies, don't use under 2 years of age.
- DOSE. Find the child's age in the top row of the dose table. Look below the correct age for the dose based on the product you have. *Tablets also available in 120 mg and 180 mg strengths; only give one dose of either of those strengths every 24 hours.
- 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.
- HOW OFTEN. Repeat every 12 hours as needed.
Customized from Itching Allergies v0.1 7/8/2025
Dosages for Diphenhydramine (Benadryl) for different weights
| Medicine Name: Diphenhydramine (Benadryl) | May Give Every | 20/24 lbs. | 25-37 lbs. | 38-49 lbs. | 50-99 lbs. | 100+ lbs. |
|---|---|---|---|---|---|---|
| Liquid 12.5 mg/ 1 teaspoon (tsp) | 6-8 hours | 3/4 tsp. | 1 tsp. | 1-1/2 tsp. | 2 tsp. | - |
| Liquid 12.5 mg/ 5 milliliters (mL) | 6-8 hours | 4 mL | 5 mL | 7.5 mL | 10 mL | - |
| Chewable 12.5 mg | 6-8 hours | - | 1 tab. | 1-1/2 tab. | 2 tab. | 4 tab. |
| Tablets 25 mg | 6-8 hours | - | 1/2 tab. | 1/2 tab. | 1 tab. | 2 tab. |
| Capsules 25 mg | 6-8 hours | - | - | - | 1 cap. | 2 cap. |
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

