Hyperglycemic hyperosmolar state associated with low-dose quetiapine treatment in a patient with bipolar disorder.

There is increasing concern about the development of diabetes mellitus and associated complications in patients administrating second-generation antipsychotics. Previous reports indicate that the risk of quetiapine, although relatively lower, is not negligible. We report a patient with bipolar disorder who, after treating with low-dose quetiapine, develops newly-onset diabetes and hyperglycemic hyperosmolar state. Clinical manifestations and managements of quetiapine-associated diabetes are addressed, and we recommend routine monitoring of serum glucose after initiating quetiapine treatment at any given dose.