Kounis Syndrome: A rare case of Omeprazol anaphylaxis

Journal: Advances in Medicine and Engineering Interdisciplinary Research DOI: 10.32629/ameir.v3i3.4065

Maria João Alves Pinto, José Pedro Manata, Raquel Almeida, João Matos Costa

Internal Medicine Service - Santarém District Hospital, Santarém, Portugal

Abstract

Anaphylaxis is a potentially fatal acute hypersensitivity reaction. Omeprazole has revolutionized the treatment of pathologies related to acid hypersecretion. Cases of anaphylactic reaction to proton pump inhibitors (PPIs) have been described. We present the case of a 30-year-old woman with acute gastroenteritis who immediately developed severe retrosternal pain, hypotension, and altered consciousness after taking intravenous omeprazole. There were signs of acute ischemia and increased markers of myocardial injury. She was admitted to the intensive care unit with good progress. Cases of severe anaphylaxis to PPIs are very rare; the mechanism is IgE-mediated, with a class effect and the possibility of cross-reaction with ranitidine. Kounis syndrome involves the association of type 2 acute myocardial infarction with anaphylactic shock. This adverse effect should be monitored, given the widespread use of PPIs, especially intravenously.

Keywords

anaphylaxis; Kounis syndrome; Omeprazole

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