Metformin-associated lactic acidosis and mortality in type 2 diabetes patients hospitalized with heart failure and/or acute coronary syndrome: A neglected clinical scenario and the potential role of insulin.

Int J Cardiol

Division of Endocrinology and Metabolism, Department of Internal Medicine, Far Eastern Polyclinic, Taipei 10043, Taiwan; Division of Endocrinology and Metabolism, Department of Internal Medicine, National Taiwan University Hospital, Taipei 10002, Taiwan; Department of Internal Medicine, National Taiwan University College of Medicine, Taipei 10051, Taiwan. Electronic address:

Published: November 2024

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http://dx.doi.org/10.1016/j.ijcard.2024.132400DOI Listing

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Article Synopsis
  • The study focused on identifying situations that lead to metformin-associated lactic acidosis (MALA) in ICU patients and evaluating its preventability.
  • A total of 198 MALA cases were assessed, with 19.2% resulting in death; the majority of patients had acute events like dehydration or severe infections that contributed to the condition.
  • The findings indicated that MALA is often preventable, highlighting the need for better physician and patient education regarding metformin use during high-risk medical situations.
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Introduction: Metformin is a first line treatment for type II diabetes. Cases of metformin-associated lactic acidosis are regularly reported. A direct causal link between metformin overdose and lactic acidosis is not clearly established.

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Extracorporeal therapies could be required for treatment of life-threatening severe acute intoxication. We present the case of an 82-year-old patient admitted to our Nephrology Unit because of metformin-associated lactic acidosis (MALA) and acute kidney injury (AKI stage III AKIN criteria). The patient also presented severe intoxication of digoxin and apixaban.

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Lactic acidosis is a rare metabolic complication that can occur in patients with diabetes mellitus type 2 who use metformin. We discuss a 79-year old woman with metformin-associated lactic acidosis (MALA) and acute kidney injury based on gastroenteritis. Patient reported acute blindness which in literature is described as a rare presentation of a metabolic acidosis (regardless of its underlying cause).

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Article Synopsis
  • The study aimed to analyze trends in the use of antidiabetic medications in patients with chronic kidney disease (CKD) and identify the risk of metformin-associated lactic acidosis (MALA).
  • It involved a review of electronic medical records from 2010 to 2021, focusing on patients over 18 with both CKD and type 2 diabetes who had been on antidiabetic drugs for at least 30 days.
  • Metformin was the most commonly prescribed drug for earlier stages of CKD, but its use declined significantly in advanced stages, while SGLT2 and DPP-4 inhibitors saw increased prescriptions, highlighting varying treatment patterns and low MALA risk in CKD patients.
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