Unusual D-lactic acid acidosis from propylene glycol metabolism in overdose.

Objective: To report a case of D-lactic acid acidosis owing to massive oral ingestion of propylene glycol.

Case Report: A 72-year old man with known congestive failure was admitted to the ICU with encephalopathy. Twelve hours prior to admission he had erroneously ingested a large amount of propylene glycol (PG).