Hemodialysis for phenformin associated lactic acidosis

Area of Science:

• Toxicology
• Nephrology
• Critical Care Medicine

Background:

• Phenformin, an older biguanide antidiabetic drug, is associated with a high risk of lactic acidosis.
• Intentional overdoses of phenformin can lead to life-threatening metabolic disturbances.

Observation:

• A patient presented with severe lactic acidosis following a significant phenformin ingestion.
• Hemodialysis was initiated on two consecutive days for management.

Findings:

• Hemodialysis temporarily improved the patient's acidosis on both occasions.
• Quantification revealed that only 1.5% of the ingested phenformin was removed via hemodialysis.
• The patient recovered fully without any long-term complications.

Implications:

• Hemodialysis may not be effective for direct phenformin drug removal.
• Hemodialysis plays a crucial supportive role in managing the biochemical derangements of phenformin-induced lactic acidosis.
• This case highlights the importance of supportive care in managing severe drug-induced metabolic emergencies.