Olanzapine-lnduced hyperglycemic nonketonic coma |
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Authors: | Roefaro J Mukherjee S M |
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Institution: | Veterans Affairs Boston Healthcare System, MA 02130-4817, USA. roefaro.john@boston.va.gov |
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Abstract: | OBJECTIVE: To report a case of olanzapine-induced hyperglycemia leading to a hyperosmolar, hyperglycemic, nonketonic coma. CASE SUMMARY: A 51-year-old, 85.5-kg (ideal body weight 79.9 kg), white man presented to a Veterans Affairs hospital with a serum glucose concentration of 1596 mg/dL. Soon thereafter, he went into a hyperosmolar, hyperglycemic, nonketonic coma. Olanzapine therapy had been instituted less than six months prior to this event; approximately two months before this event, his blood glucose was 108 mg/dL. Eight days after stopping olanzapine, the glucose concentration returned to normal, and the patient no longer required insulin nor any other glucose-lowering agents. DISCUSSION: The insulin resistance caused by olanzapine is normally attributed to the weight gain associated with the drug. In this patient, it appears that olanzapine caused hyperglycemia by a mechanism other than weight gain. CONCLUSIONS: This case report and others from the literature suggest that olanzapine therapy may induce hyperglycemia in some patients. |
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