Treatment for Acute Urticaria in Children

First-Line Treatment: Second-Generation Antihistamines

The British Journal of Dermatology recommends starting with a standard dose of a second-generation H1 antihistamine, such as cetirizine, loratadine, or fexofenadine, at age-appropriate dosing for children with acute urticaria 1
Second-generation non-sedating H1 antihistamines, including cetirizine, desloratadine, fexofenadine, levocetirizine, and loratadine, are the first-line treatment for acute urticaria in children, with options for trial to account for individual responses and tolerance 1, 2

If symptoms persist after 2-4 weeks of standard dosing, the dose of the antihistamine can be increased up to 4 times the standard dose, although this exceeds manufacturer's licensed recommendations, as suggested by the British Journal of Dermatology 1, 5

Oral corticosteroids, such as prednisolone, should be restricted to short courses (3 days in adults, adjust for children) for severe acute urticaria or angioedema affecting the mouth, according to the British Journal of Dermatology 6, 5
Long-term oral corticosteroids should not be used in chronic urticaria except in very selected cases under specialist supervision, as recommended by the British Journal of Dermatology 5

First-generation antihistamines, such as hydroxyzine or chlorpheniramine, may be added at night for additional symptom control and to help with sleep in children with resistant acute urticaria, although their sedating effects must be considered, as suggested by the British Journal of Dermatology 5, 2

Identifying and minimizing aggravating factors, including overheating, stress, alcohol, and certain medications (aspirin, NSAIDs, codeine), is important in the management of acute urticaria in children, as recommended by the British Journal of Dermatology and Praxis Medical Insights 4, 2, 3
Patient and parent education about the generally favorable prognosis is important: approximately 50% of patients with acute urticaria presenting with wheals alone will be clear by 6 months, according to the British Journal of Dermatology and Praxis Medical Insights 1, 5, 3

Intramuscular epinephrine is life-saving for anaphylaxis or severe laryngeal angioedema in children, with dosing being weight-dependent: 150 µg for children between 15-30 kg, 300 µg for those over 30 kg, as recommended by the British Journal of Dermatology 6

Avoid using first-generation antihistamines as first-line monotherapy due to sedating properties that impair school performance and daily activities in children with acute urticaria, as recommended by Praxis Medical Insights 2
Do not continue corticosteroids beyond short courses (3-10 days) due to cumulative toxicity, as the evidence for their benefit in acute urticaria is questionable, according to Praxis Medical Insights 3