A Rare Case of Pyroglutamic Acidosis After Cardiac Surgery
Year: 2026
Type: article
Study design: Case Report
Abstract: Metabolic acidosis is a common finding following cardiac surgery. Although the differential diagnosis of high-anion-gap metabolic acidosis is well established, less common causes may be overlooked, making the diagnosis challenging. We report the case of a 59-year-old patient who developed high-anion-gap metabolic acidosis after surgical treatment for mediastinitis, caused by the concomitant use of flucloxacillin and paracetamol. This drug interaction disrupts the γ-glutamyl cycle, leading to the accumulation of 5-oxoproline (pyroglutamic acid). Although rare, this interaction may cause a severe and potentially fatal reaction, particularly in patients with renal failure, sepsis, or malnutrition. As such, the possible diagnosis of pyroglutamic acidosis should be kept in mind in these settings, and the use of these medications should be discontinued immediately.
Source: Cureus
Authors: Ines Alves, Sara Ranchordas, Marta Marques
Language: English
Subfield: Nephrology
Field: Medicine
Domain: Health Sciences
Open Access status: diamond
OpenAlex ID: W7203862440