A Study of the Efficacy and Safety of Long-acting Injectable Risperidone and Risperidone Tablets in Patients With Schizophrenia

May 16, 2011 updated by: Janssen Pharmaceutical K.K.

A Parallel-Group Comparative Open-Label Study of Long-Acting Injectible Risperidone Versus Risperidone Tablets in Patients With Schizophrenia.

The purpose of this study is to evaluate the effectiveness and safety of risperidone, formulated as a long-acting injectable drug, compared with risperidone tablets in the treatment of patients with schizophrenia.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Although many schizophrenia patients currently take oral antipsychotic medications, it is estimated that up to 75% of them have difficulty adhering to the daily oral regimen. Long-acting injectable formulations may eliminate the need for daily medication and enhance patient compliance with the treatment regimen. This is an open-label, randomized, Phase III trial in patients with schizophrenia. One treatment group receives 25 to 50 mgs of long-acting risperidone, formulated for intramuscular injections, at study initiation and again after 2 weeks, while phasing out any previous antipsychotic medication during the initial 3 weeks of the study. Continuing in the treatment phase, long-acting injections are administered once every 2 weeks through Week 24, and post-treatment observation is performed for 6 weeks (total study duration of 30 weeks). Patients in the other treatment group take oral risperidone tablets, 2 to 6 mgs daily, from study initiation for 24 weeks. Post-treatment observation continues for 1 week for this group (total study duration of 25 weeks). Assessments of effectiveness made at specified intervals during treatment include Positive And Negative Syndrome Scale (PANSS), a scale for the measurement of symptoms of schizophrenia; Clinical Global Impression - Severity (CGI-S), a measure of overall severity of illness, and Clinical Global Impression - Changes (CGI-C); as well as, Brief Psychiatric Rating Scale (BPRS). Safety evaluations include the incidence of adverse events throughout the study; inspection of the injection site at times of treatment; Drug-Induced Extrapyramidal Symptoms Scale (DIEPSS), vital signs (pulse, blood pressure, temperature), and laboratory tests (hematology, biochemistry, urinalysis) at monthly intervals. The study hypothesis is that treatment with long-acting risperidone injections is not inferior to oral risperidone, as measured by changes in PANSS total score from baseline through endpoint (24 weeks), in patients with schizophrenia and is generally well-tolerated. Risperidone, long-acting formulation for intramuscular injections (25 milligrams[mg] to 50mg, maximum), given biweekly through 24 weeks. Oral risperidone (2mg/day to 6mg/day [maximum]) administered daily for 24 weeks.

Study Type

Interventional

Enrollment (Actual)

205

Phase

  • Phase 3

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

20 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Diagnosis of schizophrenia by the criteria of Diagnostic and Statistical Manual of Mental Diseases, 4th Edition (DSM-IV )
  • treatment with an antipsychotic drug (up to 6 milligrams/day of risperidone or equivalent dose) for 28 days before study initiation with no change in the dosage
  • Total Positive and Negative Syndrome Scale (PANSS) score >=60 and <120 at start of study.

Exclusion Criteria:

  • Diagnosis of mental disease other than schizophrenia
  • treated with a sustained-release injection of other antipsychotic medications within 60 days before the initiation of the study
  • history of cerebrovascular accident, convulsive disorder such as epilepsy, diabetes mellitus, liver disease, kidney disease, cardiovascular disorder, malignancy or physical exhaustion due to dehydration or malnutrition
  • have risk factors of diabetes mellitus, such as hyperglycemia.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Positive and Negative Syndrome Scale (PANSS) at screening, Weeks 8, 16, and 24.

Secondary Outcome Measures

Outcome Measure
Clinical Global Impression-Changes (CGI-C), from baseline at Weeks 8, 16 and 24; Brief Psychiatric Rating Scale (BPRS) at baseline and biweekly from Weeks 4 through 18; Clinical Global Impressions-severity (CGI-S)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Janssen Pharmaceutical K.K.

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

June 1, 2004

Study Completion (Actual)

April 1, 2006

Study Registration Dates

First Submitted

October 14, 2005

First Submitted That Met QC Criteria

October 14, 2005

First Posted (Estimate)

October 18, 2005

Study Record Updates

Last Update Posted (Estimate)

May 17, 2011

Last Update Submitted That Met QC Criteria

May 16, 2011

Last Verified

March 1, 2010

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • CR004945

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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