Metformin-associated nonketotic metabolic acidosis
M R Jurovich1, J D Wooldridge, R W Force
1Department of Family Medicine, College of Pharmacy, Idaho State University, Pocatello 83209, USA.
The Annals of Pharmacotherapy
|January 1, 1997
Summary
Metformin can cause lactic acidosis in patients with acute renal failure. Early recognition and treatment are crucial for survival, especially in diabetic patients with impaired kidney function.
Area of Science:
- Nephrology
- Endocrinology
- Critical Care Medicine
Background:
- Metformin is a common oral hypoglycemic agent used in type 2 diabetes.
- Acute renal failure (ARF) is a known risk factor for metformin-associated lactic acidosis.
- Metformin use is contraindicated in patients with significant renal dysfunction.
Observation:
- A 67-year-old male with ARF presented with symptoms of metabolic acidosis, including nausea and weakness.
- Laboratory findings revealed a pH of 7.1 and an elevated anion gap of 21 mEq/L, with no ketones detected.
- The patient was treated with fluids, sodium bicarbonate, insulin, and hemodialysis, leading to resolution of acidosis.
Findings:
- This case highlights metformin-induced nonketotic metabolic acidosis in a patient with ARF.
- Lactic acidosis associated with biguanides, like metformin, has a high mortality rate (approximately 50%).
- Most cases occur in patients with contraindications, particularly renal impairment.
Implications:
- Early recognition and prompt treatment of metformin-induced lactic acidosis are essential for improving patient outcomes.
- Healthcare providers must strictly adhere to metformin contraindications, especially in patients with renal dysfunction.
- Continuous monitoring of renal function in patients taking metformin is critical to prevent adverse events.
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