Treatment of Urticaria in Infants

First-Line Treatment

The American Academy of Pediatrics recommends starting with a second-generation non-sedating H1 antihistamine at standard pediatric dosing, specifically cetirizine or loratadine, as these are the first-line treatment for urticaria in infants 1
Second-generation antihistamines are the mainstay of therapy for both acute and chronic urticaria in infants, with cetirizine being particularly well-studied in this age group 1
Cetirizine has the shortest time to maximum concentration, making it advantageous when rapid symptom relief is needed for acute urticaria in an 8-month-old 2
If the first antihistamine is not effective after 2-4 weeks, try a different second-generation antihistamine, as individual responses vary significantly 1

If standard dosing provides inadequate control after 2-4 weeks, the dose can be increased up to 4 times the standard pediatric dose when benefits outweigh risks 1, 2

The British Association of Dermatologists recommends that oral corticosteroids should be restricted to short courses (3-10 days) for severe acute urticaria only, particularly if there is significant angioedema affecting the mouth or airway 3, 1
Long-term corticosteroid use should be avoided in chronic urticaria due to cumulative toxicity, especially concerning in the developing infant 3, 1

The American Academy of Allergy, Asthma, and Immunology recommends that intramuscular epinephrine is life-saving in anaphylaxis or severe laryngeal angioedema, with weight-dependent dosing critical in infants 3
For children between 15-30 kg, fixed-dose epinephrine pens delivering 150 µg may be prescribed for emergency self-administration if there is risk of life-threatening attacks 3

Remission is common in the majority of infants with acute spontaneous urticaria, with approximately 50% of patients with wheals alone being clear by 6 months 1