Severe hyponatremia, neuroleptic malignant syndrome, rhabdomyolysis and acute renal failure: a case report.

Acute renal failure secondary to myoglobinuria is a rare yet possible complication of malignant neuroleptic syndrome associated with the use of dopamine antagonists. We describe the case of a 42-year-old schizophrenic man who presented with severe hyponatremia, and proceeded to acute malignant neuroleptic syndrome, rhabdomyolysis, and acute renal failure. We contend that the acute hyponatremia may have served as a precipitating factor.