Metformin-associated lactic acidosis in a patient with normal kidney function.

Area of Science:

• Pharmacology
• Toxicology
• Endocrinology

Background:

• Metformin is a widely prescribed antidiabetic drug.
• Metformin-associated lactic acidosis (MALA) is a rare but serious adverse effect.
• The role of renal function in MALA is well-established, but its necessity is debated.

Observation:

• This case report details a patient who developed lactic acidosis.
• The patient had normal renal function and was on a standard metformin dose.
• No other specific risk factors for lactic acidosis were identified.

Findings:

• Metformin was identified as the causative agent through a positive rechallenge.
• This suggests metformin can induce lactic acidosis independent of significant renal impairment.
• The findings challenge the established understanding of MALA pathogenesis.

Implications:

• Clinicians should consider MALA even in patients with normal kidney function.
• Further research is needed to elucidate the mechanisms of metformin-induced lactic acidosis.
• This case highlights the importance of vigilant monitoring for adverse drug reactions.