https://dermatographia.com/blog/chronic-urticaria-and-biologics
When Dermatographia Becomes Chronic Urticaria: Biologics and Xolair — Dermatographia.com
If you have daily symptoms for more than six weeks and a supervised higher dose of antihistamines still is not controlling them, that is treatment-refracto
chronic urticariadermatographiabecomesbiologicsxolair