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Aripiprazole in the Treatment of Acutely Relapsed Patients With Schizophrenia

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00283179
Recruitment Status : Completed
First Posted : January 27, 2006
Last Update Posted : May 15, 2008
Information provided by:
Taiwan Otsuka Pharm. Co., Ltd

Brief Summary:
To evaluate the efficacy, safety and tolerability of aripiprazole in the treatment of acutely relapsed patients with diagnoses of schizophrenia or schizoaffective disorder with risperidone as an active control.

Condition or disease Intervention/treatment Phase
Schizophrenia Schizoaffective Disorder Drug: Aripiprazole Drug: Risperidone Phase 3

Detailed Description:

Medical treatment of schizophrenia uses antipsychotic drugs, which ameliorate the acute episodes and probably prevent or decrease the risk of occurrence of new episodes. Most antipsychotics share the ability to block postsynaptic dopaminergic receptors of the D2 subtype.

The typical antipsychotics (such as haloperidol and chlorpromazine) ameliorate acute episodes and possibly prevent or decrease the risk of occurrence of new episodes, but they have minimal effectiveness against negative symptoms, mood symptoms, and cognitive impairment, which often lead to poor social functioning. Its full Dopamine antagonism is often associated with a number of well-recognized debilitating side effects. One example is EPS. A new class of antipsychotics, the atypical agents (such as clozapine, risperidone, olanzapine), became available starting in the late-1980s. Their mode of action affects both the serotonin and dopamine (DA) receptors. They are better tolerated than the typical antipsychotics with regard to EPS, except at higher doses. The improvement in the side effect profile seen with the atypical antipsychotics is accompanied by efficacy against positive symptoms and perhaps some improvement in efficacy against negative symptoms. Although they offer better efficacy and lower rates of EPS compared to typical agents, they are associated with other side effects that may be of clinical concern. For example, olanzapine and clozapine have an increased incidence of weight gain and diabetes mellitus, risperidone is associated with hyperprolactinemia, and ziprasidone is associated with ECG QT interval prolongation. In addition to tolerability issues, a significant proportion of patients still do not adequately respond to these newer agents. A need still exists for efficacious alternatives that demonstrate improved tolerability and side effect profiles so as to enhance treatment compliance and long-term functioning.

Aripiprazole is a novel DA-serotonin stabilizer approved in U.S. for the management of schizophrenia. The unique mode of action of aripiprazole translates into efficacy against psychotic symptoms and a more favorable safety profile than current treatment. Its introduction will clearly provide patients and their families with a much-needed alternative to the antipsychotics currently available.

This study further examined the efficacy and safety of aripiprazole in patients having acute relapse of schizophrenia or schizoaffective disorder in Taiwan. The duration of this study was 4 weeks.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 83 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Treatment
Official Title: Efficacy and Safety of Aripiprazole in the Treatment of Acutely Relapsed Patients With Schizophrenia or Schizoaffective Disorder With Risperidone as an Active Control
Study Start Date : March 2004
Actual Study Completion Date : December 2004

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Schizophrenia

Primary Outcome Measures :
  1. PANSS-total score

Secondary Outcome Measures :
  1. PANSS-positive score, PANSS-negative score, CGI-severity score, CGI-improvement score, and safety/tolerability.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 65 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Diagnosis: Schizophrenia or schizoaffective disorder, in an acute relapse.
  • Duration of present episode/relapse: Randomization to this study occurred no more than four weeks following the day of initiation of any treatment for the last episode/relapse.
  • Age: 18 to 65 years.
  • Gender: Males and females (females of childbearing potential had a negative serum pregnancy test from screening visit, used acceptable contraception, and were not pregnant or lactating).
  • Response to previous antipsychotic agents: Patients had responded to previous antipsychotic medication
  • Current antipsychotic treatment: Prior to beginning the placebo-washout, patients had not been treated with a long-acting antipsychotic within the time required for one cycle of treatment with that long-acting antipsychotic, plus one week. Patients who had been treated with a long-acting antipsychotic within less than this time period might be enrolled in the study, providing they were judged by the investigator to be clearly clinically deteriorating.
  • Positive and Negative Syndrome Scale scores: Patients had a total PANSS score of at least 60. In addition, patients had a score of at least 4 on any two of the four PANSS items that constitute a psychotic items subscale.
  • Compliance with the protocol: Patients were rated reliably on the battery of psychiatric and movement rating scales required by the protocol.
  • Informed Consent: Patients eligible to enter the study signed an informed consent form prior to the initiation of any study procedures.

Exclusion Criteria:

  • Patients who, in the opinion of the investigator, had serious suicidal ideation or patients who were liable to serious suicide attempt, by clinical judgment.
  • Patients presented with a first episode of schizophrenia or schizoaffective disorder
  • Patients who had any of the following neurological diagnoses, whether under treatment or not, whether stable or not: migraine, epilepsy, Parkinson's disease, Alzheimer's disease, multiple sclerosis, residual of stroke, transient cerebral ischemic attacks, 'cerebral palsy' or any condition that required intermittent or maintenance treatment, or which was manifested by any abnormality on neurological examination.
  • Patients who continued to take, or who potentially needed to take, during the double-blind portion of this study, any of the following concomitant medications, which could cause unwanted drug-to-drug interactions or which could confound the analysis of antipsychotic effectiveness of the randomly assigned study drug: carbamazepine, valproic acid or sodium valproate or divalproate sodium, lithium carbonate or lithium citrate.
  • Patients who failed to withdraw from fluoxetine treatment at least 28 days prior to screening, if on treatment with fluoxetine.
  • Patients with any gastrointestinal resection, stomach stapling, or any other condition that may impair the absorption of the study medication.
  • Patients who had positive result in the urine screen for drugs of abuse (except for cannabis or medically-prescribed analgesics or benzodiazepines.)
  • Patients who met the DSM-IV criteria for psychoactive substance dependence or patients with a history of substance or alcohol dependence within one month prior to the beginning of the study.
  • Patients had any somatic condition whose symptoms or physical signs could be misinterpreted as signs or symptoms of schizophrenia or as adverse effects from antipsychotic medications.
  • Patients with any acute or unstable medical condition.
  • Patients who had taken an investigational drug within the four weeks, which preceded the start of placebo washout.
  • Patients who were treatment-resistant.
  • Patients who continued to take, or who potentially needed to take, during this study, any medication or substance that is known to be an inhibitor of the microsomal enzyme CYP2D6, or an inhibitor or a substrate of the microsomal enzyme CYP3A4.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00283179

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National Taiwan University Hospital
Taipei, Taiwan, 100
Sponsors and Collaborators
Taiwan Otsuka Pharm. Co., Ltd
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Principal Investigator: Tzung-Jeng Hwang, M.D., M.P.H. National Taiwan University Hospital
Principal Investigator: Hung-Yu Chan, M.D. Taoyuan Psychiatric Center, Ministry of Health and Welfare, Executive Yuan, R.O.C. Taiwan
Principal Investigator: Wei-Wen Lin, M.D., Ph.D. Tri-Service General Hospital
Principal Investigator: Shih-Ku Lin, M.D. Taipei City Psychiatric Center
Principal Investigator: Tung-Ping T. Su, M.D. Taipei Veterans General Hospital, Taiwan
Principal Investigator: Hai-Gwo Hwu, M.D. National Taiwan University Hospital

Publications of Results:
Layout table for additonal information Identifier: NCT00283179    
Other Study ID Numbers: 31-02-A01
First Posted: January 27, 2006    Key Record Dates
Last Update Posted: May 15, 2008
Last Verified: January 2006
Keywords provided by Taiwan Otsuka Pharm. Co., Ltd:
Schizoaffective disorder
Additional relevant MeSH terms:
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Psychotic Disorders
Schizophrenia Spectrum and Other Psychotic Disorders
Mental Disorders
Serotonin Antagonists
Serotonin Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs
Antipsychotic Agents
Tranquilizing Agents
Central Nervous System Depressants
Psychotropic Drugs
Dopamine Antagonists
Dopamine Agents
Antidepressive Agents
Dopamine Agonists
Serotonin 5-HT1 Receptor Agonists
Serotonin Receptor Agonists
Serotonin 5-HT2 Receptor Antagonists
Dopamine D2 Receptor Antagonists