Angioedema Involving the Larynx after Starting Apixaban

Angioedema is characterized by subcutaneous nonpitting edema of the skin, mucosal membranes, or both. It is often anatomically limited to subsites of the head and neck, which can be life threatening because of its sudden onset and airway compromise.1 Although angioedema has many known causes, including medications and environmental exposures, the etiology of acquired angioedema is often difficult to ascertain. Angioedema can be unpredictable and must be recognized without delay by identifying the characteristic clinical presentation and history