Do you mean. Xolair? It's major reported adverse effect is a severe systemic allergic reaction, otherwise known as anaphylaxis.
Xolair. Xolair is an incredibly useful drug when used correctly. Instead of simply asking the doctor's on this website, I would urge you to research this as much as possible on xolair's website (www. Xolair. Com) then write down and discuss all your concerns with the doctor prescribing this medication.