From the FDA Drug Label
For use in the management of pruritus due to allergic conditions such as chronic urticaria and atopic and contact dermatoses and in histamine-mediated pruritus: adults, 25 mg t.i.d. or q.i.d. ; children under 6 years, 50 mg daily in divided doses; children over 6 years, 50 to 100 mg daily in divided doses.
The recommended dose of hydroxyzine for a 5-year-old child with an allergic reaction is 50 mg daily in divided doses 1.
From the Research
For a 5-year-old child with allergies, the recommended dose of hydroxyzine is 2 mg/kg/day divided into 3-4 doses, not exceeding 50 mg total per day for this age group, as this dosage is most likely to provide effective relief from allergy symptoms while minimizing potential side effects, as supported by the general principles of antihistamine use in children 2.
Key Considerations
- Hydroxyzine is an antihistamine that works by blocking H1 receptors, reducing histamine effects that cause allergy symptoms like itching, hives, and swelling.
- The medication can cause drowsiness, so the first dose is often best given at bedtime to assess how sedating it is for your child.
- Side effects may include sedation, dry mouth, and occasionally paradoxical excitation in children.
- If symptoms don't improve within 3-5 days or worsen at any point, contact your healthcare provider.
Dosage and Administration
- The dose typically translates to about 10-12.5 mg per dose given three to four times daily.
- It's crucial to use an appropriate measuring device for liquid formulations to ensure accurate dosing.
- Always follow your doctor's specific instructions as they may adjust dosing based on your child's exact weight, severity of symptoms, and individual response to the medication, as antihistamine efficacy and safety can vary significantly in pediatric populations 3.