A 4-week, Randomized, Rater-blinded, Parallel Study to Evaluate Quetiapine in Improving Sleep Quality of Schizophrenia

• The objective sleep structures of quetiapine fumarate and haloperidol being used as mono-therapy respectively in the treatment of patients with acute schizophrenia are measured by the change of composite variables for PSG test (sleep stages, time in bed, total sleep time, sleep efficiency, sleep latency) from baseline to Week 4 (LOCF).
• The subjective sleep qualities of quetiapine fumarate and haloperidol being used as mono-therapy respectively in the treatment of patients with acute schizophrenia are measured by the change of Pittsburgh Sleep Quality Inventory (PSQI) and Epworth Sleepiness Scale(ESS) from baseline to Week 4 (LOCF).
• The clinical efficacy of quetiapine fumarate and haloperidol being used as mono-therapy respectively in the treatment of patients with acute schizophrenia are measured by the change of Positive and Negative Syndrome Scale (PANSS) and Clinical Globe Impression (CGI),and Calgary Depression Scale for Schizophrenia (CDSS) from baseline to Week 4 (LOCF).
• The clinical safety and tolerance quetiapine fumarate and haloperidol being used as mono-therapy respectively in the treatment of patients with acute schizophrenia are measured by Treatment Emergent Symptom Scale (TESS) in day 14 and day 28.

Inclusion criteria

For inclusion in the study patients must fulfill all of the following criteria:

• Provision of written informed consent by patient or his/her legal guardian
• Hospitalized for a diagnosis of Schizophrenia paranoid subtype by Diagnostic and Statistical Manual of Mental Disorders- Fourth Edition (DSM-IV)
• Positive and Negative Syndrome Scale (PANSS) total score≥60
• Female patients of childbearing potential must be using a reliable method of contraception and have a negative urine human chronic gonadotropin (HCG) test at enrolment
• Able to understand and comply with the requirements of the study

Exclusion criteria

Any of the following is regarded as a criterion for exclusion from the study:

• Pregnancy or lactation
• Any DSM-IV Axis I disorder not defined in the inclusion criteria
• Patients who, in the opinion of the investigator, pose an imminent risk of suicide or a danger to self or others
• Known intolerance or lack of response to quetiapine fumarate or/and haloperidol, as judged by the investigator
• Use of any of the following cytochrome P450 3A4 inhibitors in the 14 days preceding enrolment including but not limited to: ketoconazole, itraconazole, fluconazole, erythromycin, clarithromycin, troleandomycin, indinavir, nelfinavir, ritonavir, fluvoxamine and saquinavir
• Use of any of the following cytochrome P450 3A4 inducers in the 14 days preceding enrolment including but not limited to: phenytoin, carbamazepine, barbiturates, rifampin, St. John's Wort, and glucocorticoids
• Administration of a depot antipsychotic injection within one dosing interval (for the depot) before randomisation
• Substance or alcohol dependence at enrolment (except dependence in full remission, and except for caffeine or nicotine dependence), as defined by DSM-IV criteria
• Opiates, amphetamine, barbiturate, cocaine, cannabis, or hallucinogen abuse by DSM-IV criteria within 4 weeks prior to enrolment
• Medical conditions that would affect absorption, distribution, metabolism, or excretion of study treatment
• Unstable or inadequately treated medical illness (e.g. congestive heart failure, angina pectoris, hypertension) as judged by the investigator
• Organic changes was founded by brain CT
• Involvement in the planning and conduct of the study
• Previous enrolment or randomisation of treatment in the present study.
• Participation in another drug trial within 4 weeks prior enrolment into this study or longer in accordance with local requirements
• A patient with Diabetes Mellitus (DM) fulfilling one of the following criteria: unstable DM defined as enrolment glycosylated hemoglobin (HbA1c) >8.5%; admitted to hospital for treatment of DM or DM related illness in past 12 weeks; not under physician care for DM Physician responsible for patient's DM care has not indicated that patient's DM is controlled; Physician responsible for patient's DM care has not approved patient's participation in the study; has not been on the same dose of oral hypoglycaemic drug(s) and/or diet for the 4 weeks prior to randomisation; for thiazolidinediones (glitazones) this period should not be less than 8 Weeks; taking insulin whose daily dose on one occasion in the past 4 weeks has been more than 10% above or below their mean dose in the preceding 4 weeks. Note: If a diabetic patient meets one of these criteria, the patient is to be excluded even if the treating physician believes that the patient is stable and can participate in the study.
• An absolute neutrophil count (ANC) of 1.5 x 109/L
• Sleep disorder such as Apnea Hypopneas Syndrome, periodic leg movement syndrome and narcolepsy
• The work time is rotate and/or often flies across the time zone
• Use of clozapine within 28 days prior to randomization