If I am on Xolair injections for asthma, will it affect the testing?Created OnSeptember 20, 2020Last Updated OnSeptember 20, 2020byjohannes Print You are here: Main FAQs If I am on Xolair injections for asthma, will it affect the testing? < All Topics Research has suggested it directly affects the IgE pathway so we would suggest if you are on injections that you do not order a blood test.
