Angiotensin-converting enzyme inhibitor ACEi induced angioedema ACEi-AE is defined as physical swelling of the deep skin layers or mucous membranes due to increased vascular permeability and leakage of fluid into the interstitial space caused while taking an ACEi

Angiotensin-converting enzyme inhibitor ACEi induced angioedema ACEi-AE most commonly affects the lips, mouth, face, upper airway, and less commonly the gastrointestinal tract. This condition may lead to life-threatening airway compromise which would require emergent intubation. Currently, strong evidence is lacking to help guide management of ACEi-AE in the emergency department (ED).

Inclusion Criteria:

•Patients must be ≥ 18 years old, be diagnosed with suspected ACEi-AE (with ACEi use). ACEi use is defined as patient-reported use or evidence indicating use listed in the chart.

Exclusion Criteria:

•Patients will be excluded if they have an allergy to TXA or any components of the formulation, present with an urticaria, have a personal or family history of hereditary angioedema, or received TXA administration in another department besides the ED.

Patients must be ≥ 18 years old, be diagnosed with suspected ACEi-AE (with ACEi use). ACEi use is defined as patient-reported use or evidence indicating

Study data or any protected health information will not be shared with anyone that is not delegated to the study. The PI is committed to disseminate research results in a timely fashion. Sharing of results generated by the data analysis during the course of the project will be through presentation at national scientific meetings and/or publication in open access journals. All information obtained will be source de-identified and presented on a large scale and not traceable to any one particular individual.

2 years