Administration of Tranexamic Acid as Treatment for Angiotensin Converting Enzyme Inhibitor-Induced Angioedema: A Case Report

<b>Background</b> Angiotensin converting enzyme inhibitor-induced angioedema is a major cause of angioedema-related hospitalizations each year. Common swelling predilection sites include the face, periorbital skin, lips, pharynx, larynx, and tongue. Involvement of airway structures could lead to airway obstruction and ultimately death if not treated promptly. A 62-year-old man presented to a rural clinic with a massively swollen tongue that obscured visualization of the retropharynx and mildly swollen lips. The patient stated that he had been taking lisinopril for many years and never had a swelling episode similar to this. The patient was initially administered epinephrine, antihistamine, steroids, and Tranexamic acid. A second dose of Tranexamic acid was administered 30 min later followed by close monitoring. Seven hours after the first administration, the patient had near-complete resolution of tongue swelling and was later discharged. Angioedema treatment is still variable and hospitals in different settings may be able to take advantage of available resources for treatment. Tranexamic acid is a cheap and widely available antifibrinolytic that may be used to treat angiotensin converting enzyme inhibitor-induced angioedema, especially if more specific therapeutics are unavailable.