A class of blood pressure medications called angiotensin converting enzyme inhibitors (ACEI, e.g. lisinopril, benazepril, etc) sometimes have a side effect of angioedema, usually manifesting as lip swelling. As described in that link, angioedema is also part of some types of allergic reactions. In those cases it is generally treated with steroids, antihistamines, and bronchodilators. However, ACEI angioedema is a bradykinin-mediated, a side effect of the drug’s mechanism of action rather than an IgE (immune system) mediated allergic reaction.
Are steroids (glucocorticoids) helpful for treatment of ACEI angioedema?