Hi, I have a 15 year old son who is on high school swimming team. Last year he developed itchy skin and started to have hives on his skin. He went to doctor and tested that he is allergic to lots of things including Dust F Mite and a bunch of others. It's been a year and hasn't gone away. He has to take OTC Aller-Tec daily. Otherwise, the symptom will come back. We went to the doctor again and she suggested to start on XOLAIR injection regularly which can last for years. We are wondering if this has long term side effects. Is there better alternative? Thank you very much.