What is the definition or description of: irinotecan allergy?

Allergy/side effect: Side effects are known adverse reactions that occur due to the metabolism of the medication or the mechanism of action of the drug that just happens to be undesirable or toxic. Typical allergic reactions (type i hsr) consist of flushing, hives, itching, swelling, respiratory symptoms or GI symptoms. True allergic reactions can be desensitized by an allergist trained to perform the procedure.