A hypersensitivity reaction happens when the immune system mistakenly identifies harmless substances as harmful. There are several types of hypersensitivity reactions, depending on the class of ...

Rheumatoid arthritis is associated with an atypical immune response called a type 3 hypersensitivity reaction. This reaction happens due to immune complexes in the body. It can be treated by ...

Both allopurinol and febuxostat carry similar, significant increased risks for hypersensitivity reactions compared with colchicine, according to data published in Annals of the Rheumatic Diseases.