Abstract
We report the case of a 61-year-old diabetic woman with end-stage renal disease who was on hemodialysis and who developed an encephalopathy and episodes of hypotension and hypoventilation, all of which showed rapid and dramatic responses on multiple occasions to the administration of the opiate antagonist naloxone. Improvement in encephalopathy was confirmed by electroencephalography. The patient had received no exogenous opiates and had a normal β-endorphin level. She subsequently developed myoclonus and was treated for possible aluminum overload that was of borderline magnitude. We conclude that this patient had an encephalopathy that responded to opiate receptor blockade. Because of cerebrovascular disease, episodes of diminished blood pressure due to a state of increased opiate receptor stimulation may have unmasked this underlying encephalopathy. These effects may have been secondary to increased opiate-binding sites or to elevated central nervous system levels of endogenous opiates.
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