Efficacy and Safety of Asenapine Compared With Olanzapine in Patients With Persistent Negative Symptoms of Schizophrenia (A7501013)(COMPLETED)(P05771)

Study Description

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Study Description Study Design Arms and Interventions Outcome Measures Eligibility Criteria Contacts and Locations More Information

Brief Summary:

Treatment with conventional antipsychotics such as haloperidol has little effect or may sometimes even worsen negative symptoms (such as blunted affect, emotional withdrawal, and poor rapport) of schizophrenia. The newer "atypical" antipsychotics agents, such as olanzapine, has shown improvement in the treatment of negative symptoms in acute trials. The purpose of this study is to compare an investigational compound (asenapine) with a marketed agent (olanzapine) in the treatment of stable subjects with persistent negative symptoms of schizophrenia for 6 months. Patients completing this study may be eligible to participate in an extension 6 months of treatment. Patients are required to have stable symptoms prior to entry into study.

Condition or disease	Intervention/treatment	Phase
Schizophrenia	Drug: Asenapine; Drug: Olanzapine	Phase 3

Study Design

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Study Description Study Design Arms and Interventions Outcome Measures Eligibility Criteria Contacts and Locations More Information

Study Type :	Interventional (Clinical Trial)
Actual Enrollment :	468 participants
Allocation:	Randomized
Intervention Model:	Parallel Assignment
Masking:	Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose:	Treatment
Official Title:	A Multicenter, Double-Blind, Flexible -Dose, 6-Month Trial Comparing the Efficacy and Safety of Asenapine With Olanzapine in Stable Subjects With Predominant, Persistent Negative Symptoms of Schizophrenia.
Study Start Date :	December 2004
Actual Primary Completion Date :	November 2008
Actual Study Completion Date :	December 2008

Arms and Interventions

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Study Description Study Design Arms and Interventions Outcome Measures Eligibility Criteria Contacts and Locations More Information

Arm	Intervention/treatment
Experimental: asenapine	Drug: Asenapine; 5-10 mg sublingually twice daily for up to 26 weeks
Active Comparator: olanzapine	Drug: Olanzapine; 5-20 mg by mouth once daily for up to 26 weeks

Outcome Measures

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Study Description Study Design Arms and Interventions Outcome Measures Eligibility Criteria Contacts and Locations More Information

Primary Outcome Measures :

1. Change From Baseline in Negative Symptoms of Schizophrenia Measured by the Negative Symptom Assessment (NSA) Scale Total Score [ Time Frame: Day 182 ]
   The NSA Scale is a 16-item clinician-rated instrument for rating the negative symptomatology of schizophrenia. Total score ranges from 16 to 96, with greater scores indicating greater severity of symptoms.

Secondary Outcome Measures :

1. Change From Baseline in Quality of Life Measured by the Quality of Life Scale (QLS) Total Score [ Time Frame: Day 182 ]
   The Quality of Life Scale is a 21-item clinician-rated scale for rating psychosocial functioning (Interpersonal Relations, Instrumental Role, Intrapsychic Foundations, and Common Objects and Activities). The score ranges from 0 to 126, with greater values indicating better quality of life.
2. Change From Baseline in Body Weight [ Time Frame: Day 182 ]

Eligibility Criteria

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Study Description Study Design Arms and Interventions Outcome Measures Eligibility Criteria Contacts and Locations More Information

Ages Eligible for Study:	18 Years and older (Adult, Senior)
Sexes Eligible for Study:	All
Accepts Healthy Volunteers:	No

Criteria

Inclusion Criteria:

• Have a documented current diagnosis of schizophrenia of paranoid, disorganized, catatonic, residual, or undifferentiated subtype with persistent negative symptoms.
• No increase in level of psychiatric care during the past few months due to worsening of symptoms of schizophrenia.
• Caregiver required.

Exclusion Criteria:

• Have an uncontrolled, unstable clinically significant medical condition.
• Have any other psychiatric disorder other than schizophrenia as a primary diagnosis including depression.

Contacts and Locations

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Study Description Study Design Arms and Interventions Outcome Measures Eligibility Criteria Contacts and Locations More Information

No Contacts or Locations Provided

More Information

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Study Description Study Design Arms and Interventions Outcome Measures Eligibility Criteria Contacts and Locations More Information

Publications of Results:

Buchanan RW, Panagides J, Zhao J, Phiri P, den Hollander W, Ha X, Kouassi A, Alphs L, Schooler N, Szegedi A, Cazorla P. Asenapine versus olanzapine in people with persistent negative symptoms of schizophrenia. J Clin Psychopharmacol. 2012 Feb;32(1):36-45. doi: 10.1097/JCP.0b013e31823f880a.

Responsible Party:	Merck Sharp & Dohme Corp.
ClinicalTrials.gov Identifier:	NCT00145496 History of Changes
Other Study ID Numbers:	P05771; Aphrodite; A7501013
First Posted:	September 5, 2005
Results First Posted:	March 25, 2010
Last Update Posted:	September 25, 2015
Last Verified:	September 2015

Additional relevant MeSH terms:

Schizophrenia; Schizophrenia Spectrum and Other Psychotic Disorders; Mental Disorders; Olanzapine; Asenapine; Antiemetics; Autonomic Agents; Peripheral Nervous System Agents; Physiological Effects of Drugs; Gastrointestinal Agents	Antipsychotic Agents; Tranquilizing Agents; Central Nervous System Depressants; Psychotropic Drugs; Serotonin Uptake Inhibitors; Neurotransmitter Uptake Inhibitors; Membrane Transport Modulators; Molecular Mechanisms of Pharmacological Action; Neurotransmitter Agents; Serotonin Agents