Efficacy and Safety of Asenapine Compared With Olanzapine in Patients With Persistent Negative Symptoms of Schizophrenia (25543)(COMPLETED)(P05817)

This study has been completed.
Information provided by (Responsible Party):
Merck Sharp & Dohme Corp.
ClinicalTrials.gov Identifier:
First received: September 13, 2005
Last updated: May 15, 2014
Last verified: May 2014
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, have 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 Intervention Phase
Drug: asenapine
Drug: olanzapine
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Multicenter, Double-Blind, Flexible -Dose, 6-Month Trial Comparing the Efficacy Safety of Asenapine With Olanzapine in Stable Subjects With Predominant, Persistent Negative Symptoms of Schizophrenia

Resource links provided by NLM:

Further study details as provided by Merck Sharp & Dohme Corp.:

Primary Outcome Measures:
  • Changes from baseline at 6-months in Negative symptoms of schizophrenia measured by the Negative Symptoms Assessment (NSA) scale [ Time Frame: Change from baseline at 6-months ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Change from baseline at 6-months in quality of life measured by the Quality of Life (QLS) scale [ Time Frame: Change from baseline at 6-months ] [ Designated as safety issue: No ]
  • Positive and negative symptoms and other symptoms of schizophrenia e.g., hostility, excitement, disorganized thoughts and cognition measured by the Positive and Negative Symptom Scale (PANSS) [ Time Frame: Change from baseline at 6-months ] [ Designated as safety issue: No ]
  • Depressive symptoms measured by the Calgary Depression Scale for Schizophrenia (CDSS) [ Time Frame: Change from baseline at 6-months ] [ Designated as safety issue: No ]
  • Overall clinical global impression of severity improvement measured by the Clinical Global Impression of Severity (CGI-S) and Clinical Global Impression of Improvement (CGI-I) [ Time Frame: Change from baseline at 6-months ] [ Designated as safety issue: No ]

Estimated Enrollment: 444
Study Start Date: May 2005
Study Completion Date: June 2007
Primary Completion Date: June 2007 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Asenapine Drug: asenapine
5-10 mg sublingually twice daily for 26 weeks
Active Comparator: Olanzapine Drug: olanzapine
5-20 mg by mouth once daily for 26 weeks
Other Name: Zyprexa


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

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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No Contacts or Locations Provided
  More Information

Responsible Party: Merck Sharp & Dohme Corp.
ClinicalTrials.gov Identifier: NCT00212836     History of Changes
Other Study ID Numbers: P05817  Aphrodite;  25543 
Study First Received: September 13, 2005
Last Updated: May 15, 2014
Health Authority: Denmark: Danish Medicines Agency
Finland: Finnish Medicines Agency
France: Afssaps - Agence française de sécurité sanitaire des produits de santé (Saint-Denis)
Germany: Federal Institute for Drugs and Medical Devices
Hungary: National Institute of Pharmacy
Norway: Norwegian Medicines Agency
Spain: Spanish Agency of Medicines
Sweden: Medical Products Agency
United Kingdom: Medicines and Healthcare Products Regulatory Agency
South Africa: Medicines Control Council
Poland: Office for Registration of Medicinal Products, Medical Devices and Biocidal Products
Australia: Department of Health and Ageing Therapeutic Goods Administration

Additional relevant MeSH terms:
Mental Disorders
Schizophrenia and Disorders with Psychotic Features
Antipsychotic Agents
Autonomic Agents
Central Nervous System Agents
Central Nervous System Depressants
Gastrointestinal Agents
Molecular Mechanisms of Pharmacological Action
Neurotransmitter Agents
Neurotransmitter Uptake Inhibitors
Peripheral Nervous System Agents
Pharmacologic Actions
Physiological Effects of Drugs
Psychotropic Drugs
Serotonin Agents
Serotonin Uptake Inhibitors
Therapeutic Uses
Tranquilizing Agents

ClinicalTrials.gov processed this record on April 27, 2016