Lack of effect of high-volume continuous veno-venous haemofiltration with dialysis in massive carbamazepine overdose.

A 32-year-old man, with a long history of chronic pain and bipolar disorder, was admitted to our emergency department 2 h after a mixed overdose, predominately consisting of carbamazepine. Following no clinical improvement after four days of ventilation on our intensive care unit (ICU), high-volume continuous veno-venous haemofiltration with dialysis was instituted to enhance the elimination of the carbamazepine. It had no significant effect on the patient's clinical status or serum carbamazepine level. It was discontinued after 48 h. He spontaneously recovered and was discharged uneventfully from ICU after 7 days.