Serum creatine kinase elevation as a possible complication of therapy with olanzapine.

Presents a case of extremely high elevated serum creatine kinase (CK) levels induced by olanzapine therapy. Case report of a 33-year-old white German man with schizoaffective disorder according to ICD-10 criteria who had been treated with olanzapine for seven weeks when he suddenly developed extremely high elevated serum CK concentrations; Suggestion that dramatic elevations in serum CK and myoglobin levels seem to be a rare but possibly dangerous complication of olanzapine therapy.