In adult patients with schizophrenia, quetiapine fumarate is licensed to maximal dose of 750mg/day. The target dose of quetiapine fumarate recommended in the manufacturer's prescribing information is 300-450 mg/day in China, though similar efficacy for quetiapine fumarate (600 mg/day), olanzapine (15 mg/day) and Risperidone (5 mg/day) was reported in a small, randomised, rater-blinded trial. Because of the low incidence of EPS, the limitation potential for weight gain and prolactin elevation, quetiapine fumarate should be well tolerated in this sensitive patient population with higher dose (600mg/day-750mg/day) (Peuskens 2004).