olanzapine and Water-Intoxication

Topics: Adult; Benzodiazepines; Double-Blind Method; Female; Humans; Male; Middle Aged; Olanzapine; Polyuria; Schizophrenia; Water Intoxication

A man in his twenties was diagnosed with schizophrenia in his late teens. The night before his death, his family reported he drank a large amount of water, vomited, collapsed, and snored loudly while sleeping, but they did not view the event seriously as he did it routinely. The following morning, he was found dead. Autopsy revealed hyponatremia by water intoxication as the cause of death. Water intoxication has various causes. In this case, 610 ng/mL olanzapine was detected in serum samples. Although this concentration is not as high as the fatal concentrations reported in past studies, it might have caused some adverse effects. Furthermore, the observation that excessive drinking behavior started after the dose of olanzapine was increased suggests a possibility that olanzapine aggravated water intoxication.

Topics: Adult; Antipsychotic Agents; Benzodiazepines; Chlorides; Fatal Outcome; Humans; Hyponatremia; Male; Olanzapine; Potassium; Schizophrenia; Sodium; Vitreous Body; Water Intoxication

We report on a case of rhabdomyolysis induced by the correction of hyponatremia after psychogenic polydipsia and clozapine use, where the switch to a high dose of olanzapine resulted in the non-recurrence of rhabdomyolysis. The 46-year-old patient with the diagnosis of schizophrenia paranoid type, who had been on clozapine treatment for the previous 4 years, was admitted with the symptoms of generalized seizure and vomiting, and as severe hyponatremia was proved, its correction with the parallel use of clozapine treatment was done. CK concentrations increased to 48 120 U/L without any symptom of neuroleptic malignant syndrome. To prevent acute renal insufficiency, high-volume alkaline diuresis was initiated and clozapine was tapered and stopped. On the day 12 of treatment, olanzapine was started and was elevated to 30 mg/day. CK concentration began to fall returning to the normal concentration on day 20. Six months after the switch to olanzapine no recurrence of rhabdomyolysis was detected; clinical and laboratory findings were normal. We suggest that after a benzodiazepine-type antipychotic-induced rhabdomyolysis, a switch to another atypical antipsychotic can be a cautious clinical strategy.

Topics: Antipsychotic Agents; Benzodiazepines; Clozapine; Creatine Kinase; Humans; Male; Middle Aged; Olanzapine; Rhabdomyolysis; Schizophrenia; Water Intoxication

Some reports of impaired glucose tolerance associated with olanzapine (OLZ) treatment have been published before OLZ was marketed in Japan. In Japan, we have been prohibited from using OLZ for patients with diabetes mellitus, since several cases with OLZ-associated impaired glucose tolerance including two deaths from diabetic coma have been reported. Here, we report four cases of OLZ-associated impaired glucose tolerance and review the points to consider in treatment with OLZ. Of our four cases, three cases were new-onset (non diabetes mellitus cases) and the other case was a diabetes mellitus-existent (diabetes mellitus case). In the non DM cases, the time to the onset of impaired glucose tolerance after initiating treatment with OLZ was 8-9 months, and the impaired glucose tolerance immediately improved after discontinuing treatment with OLZ and initiating treatment for diabetes mellitus. Therefore, it is necessary to continue long-term monitoring of the parameters of glucose metabolism for all patients treated with OLZ. Should impaired glucose tolerance develop during treatment with OLZ, treatment with OLZ should be discontinued immediately and treatment for diabetes mellitus should be started if necessary. Although the condition of diabetes mellitus was stable befor initiating treatment with OLZ in the DM case, hyperglycemia developed immediately after initiating treatment with OLZ and the condition remained unstable even after early treatment for diabetes mellitus. Therefore, it is necessary to check for a previous history of diabetes mellitus and hyperglycemia befor initiating treatment with OLZ. Correlations between weight gain and occurrence of impaired glucose tolerance are not clear, so it is necessary to monitor the occurrence of impaired glucose tolerance even in cases without weight gain.

Topics: Adult; Antipsychotic Agents; Benzodiazepines; Contraindications; Diabetes Mellitus; Disease Progression; Female; Glucose Intolerance; Humans; Hyperglycemia; Male; Middle Aged; Olanzapine; Schizophrenia; Time Factors; Water Intoxication

Our objective was to determine the outcome of novel strategies in managing a case of severe polydipsia.. The patient was a 39-year-old male with a 20-year history of paranoid schizophrenia who, despite only mild residual psychotic symptoms, had been hospitalized for the previous 10 years because of severe polydipsic behaviour complicated by water intoxication.. Novel antipsychotic agents, risperidone and olanzapine, as well as the specific angiotensin-II receptor blocking drug, irbesartan were employed at selected intervals in a study lasting nearly 3 years. A strict behavioural management programme was ongoing, in which diurnal weight change and the number of breaches of weight limits, requiring management in a low-stimulus environment, were documented on a daily basis. Summary measures of diurnal weight change and behavioural intervention were charted against changes in treatment.. Polydipsic behaviour improved on risperidone up to 4 mg daily, but was not sustained. Olanzapine was similarly successful in stabilizing polydipsia, and improvement was achieved with the addition of irbesartan.. We suggest that the D2-sparing profiles of receptor binding achieved with low-dose risperidone and olanzapine may account for this beneficial effect. The benefit derived with irbesartan implicates the involvement of brain angiotensin systems centrally in helping to regulate drinking behaviour.

Topics: Adult; Angiotensin Receptor Antagonists; Angiotensin-Converting Enzyme Inhibitors; Antipsychotic Agents; Benzodiazepines; Biphenyl Compounds; Dose-Response Relationship, Drug; Humans; Irbesartan; Male; Olanzapine; Pirenzepine; Risperidone; Schizophrenic Psychology; Tetrazoles; Water Intoxication

Topics: Adult; Animals; Antipsychotic Agents; Benzodiazepines; Clozapine; Drug Administration Schedule; Humans; Male; Olanzapine; Pirenzepine; Schizophrenia; Schizophrenic Psychology; Treatment Outcome; Water Intoxication