Editing Angioedema (section)

=== Allergic ===
In allergic angioedema, avoidance of the allergen and use of antihistamines may prevent future attacks. [[Cetirizine]] is a commonly prescribed antihistamine for angioedema.  Some patients have reported success with the combination of a nightly low dose of cetirizine to moderate the frequency and severity of attacks, followed by a much higher dose when an attack does appear. Severe angioedema cases may require desensitization to the putative allergen, as mortality can occur. Chronic cases require [[glucocorticoid|steroid]] therapy, which generally leads to a good response. In cases where allergic attack is progressing towards airway obstruction, [[epinephrine]] may be life-saving.{{citation needed|date=March 2023}}