A case of infusion-related angioedema associated with the use of an infliximab biosimilar (infliximab-abda) is reported in order to bring awareness that this adverse effect is still highly possible in biosimilars, similar to the reference infliximab biologic.
A 37-year-old white male with a past medical history significant for ileocolonic fistulizing Crohn's disease, depression, and gastroesophageal reflux disease (GERD) presented to an emergency department with shortness of breath, urticaria, and tongue swelling that had developed shortly after initiation of an infusion of infliximab-abda. The patient had no documented allergies at the time of presentation. The patient was taking oral budesonide 9 mg daily and oral azathioprine 50 mg daily for treatment of Crohn's disease. Other medications included oral omeprazole 40 mg every morning for GERD and oral sertraline 100 mg daily for depression. The patient's tongue swelling worsened, and he was intubated for airway protection. The patient received supportive care treatment for angioedema with intravenous (IV) dexamethasone 8 mg every 8 hours, IV diphenhydramine 50 mg every 8 hours, and IV famotidine 20 mg every 12 hours. He was extubated approximately 43 hours later and observed overnight in a medical intensive care unit. He was transferred to a general medicine unit the next day for further care. The total hospital length of stay was 4 days.
A 37-year-old man developed infusion-related angioedema with use of infliximab-abda. Discontinuation of the biosimilar product along with supportive care brought about resolution of angioedema. There are no prior published reports of infusion-related angioedema reactions secondary to infliximab-abda use.