Hello~ As you probably know, a total IgE test result that is high means that you may have some kind of allergy, be it food, environmental or drug. But the results of a total IgE test don't show what you're allergic to or how serious your allergy may be. A specific IgE test result that is high means that you may be allergic to the allergen that was tested.
I would definitely discuss this with your doctor and even the pharmacist, the side-effects you are having need to be addressed and possibly the drug needs to be changed.