A Study of the Efficacy (Effectiveness) of Paliperidone Palmitate in the Prevention of Recurrence of the Symptoms of Schizophrenia.

A Randomized Double-blind Placebo-controlled Parallel Group Study Evaluating Paliperidone Palmitate in the Prevention of Recurrence in Patients With Schizophrenia. Placebo Consists of 20% Intralipid (200 mg/mL) Injectable Emulsion.

The purpose of this study is to evaluate the efficacy of paliperidone palmitate compared with placebo in the prevention of recurrence of the symptoms of schizophrenia and to assess the safety and tolerability of paliperidone palmitate in patients with stable and symptomatic schizophrenia. The placebo used in this study was a nutritional substance known as 20% Intralipid emulsion given to patients requiring intravenous feedings.

Study Overview

Status

Completed

Conditions

Detailed Description

Many patients with schizophrenia have difficulty adhering to a daily oral treatment regimen. Long-acting injectable formulations, such as long-acting injectable paliperidone palmitate, may provide therapeutic plasma concentrations over several weeks, thereby eliminating the need for daily oral medication and making compliance easier. This study is a randomized (patients will be assigned to different treatment groups based solely on chance), double-blind (neither the patient nor the physician will know if placebo or drug is being given and at what dose), placebo-controlled, parallel-group, multicenter study followed by an open-label extension period in patients with schizophrenia. The study is designed to evaluate the efficacy of paliperidone palmitate (a long-acting injectable formulation) in delaying the time to and decreasing the rate of recurrence compared with placebo in patients with schizophrenia. The study will consist of 5 periods: an up to 7-day screening/washout/tolerability period, a 9-week open-label transition period, a 24-week open-label maintenance period, a randomized, variable-length double-blind, placebo-controlled recurrence prevention period, and an up to 52-week open-label extension period. Patients will have intramuscular (i.m.) study drug injections and efficacy and safety evaluations performed every 4 weeks throughout the study. Efficacy will be evaluated during the study using a recurrence assessment, the Positive and Negative Symptom Scale for Schizophrenia (PANSS), the Clinical Global Impression - Severity (CGI-S) scale, and the Personal and Social Performance (PSP) scale. Safety will be assessed throughout the study by monitoring adverse events; use of extrapyramidal symptoms (EPS) rating scales (Abnormal Involuntary Movement Scale [AIMS], Barnes Akathisia Rating Scale [BARS], Simpson Angus Scale [SAS]); clinical laboratory testing; vital signs (temperature, blood pressure, and heart rate) measurements; electrocardiograms (ECGs); and physical examinations. Additionally, the patients will assess the tolerability of the injections by evaluating the pain of the injection and the pain at the injection sites. Tolerability test: 3 mg/day of oral ER OROS paliperidone for 4 days. Transition (9 wks): 50 mg eq. paliperidone palmitate i.m. dose on Day 1, then i.m. injections (25, 50, or 100 mg eq.) once every 4 wks (q4wk). Maintenance (24-wks): paliperidone palmitate i.m. injections (25, 50, or 100 mg eq.) q4wk. Recurrence Prevention: paliperidone palmitate i.m. injections (25, 50, or 100 mg eq. or placebo) q4wk. Open-label paliperidone palmitate (25, 50, 75, or 100 mg eq.) q4wk for 12 dosing periods.

Study Type

Interventional

Enrollment (Actual)

414

Phase

  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

      • Costa Rica, Costa Rica
      • Gwangju, Korea, Republic of
      • Inchun, Korea, Republic of
      • Pusan, Korea, Republic of
      • Seoul, Korea, Republic of
      • Ciudad De Mexico, Mexico
      • Merida, Mexico
      • Monterrey, Mexico
      • Bucharest, Romania
      • Bucuresti, Romania
      • Cluj-Napoca, Romania
      • Iasi, Romania
      • Sibiu, Romania
      • Tg Mures, Romania
      • Timisoara, Romania
      • Arkhangelsk, Russian Federation
      • Moscow, Russian Federation
      • Moscow N/A, Russian Federation
      • Moscow Russia, Russian Federation
      • Samara N/A, Russian Federation
      • St Petersburg N/A, Russian Federation
      • Yaroslavl, Russian Federation
      • Cape Town, South Africa
      • Centurion Gauteng, South Africa
      • Florida Johannesburg Gauteng, South Africa
      • Johannesburg, South Africa
      • Changhua, Taiwan
      • Kaohsiung, Taiwan
      • Tainan, Taiwan
      • Taoyuan, Taiwan
      • Dnepropetrovsk, Ukraine
      • Glevakha, Ukraine
      • Kharkiv, Ukraine
      • Kiev, Ukraine
      • Kyiv, Ukraine
      • Lvov, Ukraine
      • Odessa, Ukraine
      • Simferopol, Ukraine
      • Vinnitsa, Ukraine
    • Arkansas
      • Little Rock, Arkansas, United States
    • California
      • Cerritos, California, United States
      • Santa Ana, California, United States
    • Florida
      • Hialeah, Florida, United States
    • Illinois
      • Chicago, Illinois, United States
      • Granite City, Illinois, United States
    • Louisiana
      • Lake Charles, Louisiana, United States
      • Shreveport, Louisiana, United States
    • Mississippi
      • Flowood, Mississippi, United States
    • Missouri
      • St. Louis, Missouri, United States
    • New Jersey
      • Clementon, New Jersey, United States
    • New York
      • Cedarhurst, New York, United States
    • Ohio
      • Cleveland, Ohio, United States
    • Oklahoma
      • Oklahoma City, Oklahoma, United States
    • Texas
      • Conroe, Texas, United States
      • Desoto, Texas, United States
      • Irving, Texas, United States
      • San Antonio, Texas, United States

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

18 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Patients who meet the diagnostic criteria for schizophrenia according to DSM-IV-TM for at least 1 year before screening
  • have a PANSS score of <120
  • have a body mass index (BMI) >/=15.0 kilogram (kg)/meter (m)2
  • and have resided at the same address for at least 30 days

Exclusion Criteria:

  • Patients unable to provide their own consent
  • have been involuntarily committed to psychiatric hospitalization
  • have primary, active DSM-IV-TM diagnosis other than schizophrenia
  • who have a DSM-IV-TM diagnosis of active substance dependence within 3 months before screening (nicotine and caffeine are not exclusionary)
  • have a history of treatment resistance as defined by failure to respond to 2 adequate trials (minimum of 4 weeks at a therapeutic dose) of different antipsychotic medications
  • have a history of any severe preexisting gastrointestinal narrowing or inability to swallow the medication whole with water
  • have a history of neuroleptic malignant syndrome (NMS)
  • are at significant risk of suicidal or violent behavior
  • current presence of any significant or unstable medication condition
  • treatment with any protocol disallowed therapies
  • clinically significant result from screening laboratory or ECG.

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: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: 001
Paliperidone Palmitate 25, 50, 75 or 100 mg eq every 4 wk for up to 24 mo
25, 50, 75 or 100 mg eq every 4 wk for up to 24 mo
Placebo Comparator: 002
Placebo Placebo every 4 wk up to 24 mo
Placebo every 4 wk up to 24 mo

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
The primary efficacy criteria for this study is the time from randomization to the first recurrence event during the double-blind recurrence prevention period
Time Frame: After 68 relapse events
After 68 relapse events

Secondary Outcome Measures

Outcome Measure
Time Frame
Changes from randomization to the end of the recurrence prevention period in PANSS (total and subscales), CGI-S, and PSP. Incidence of adverse events, labs and ECGs throughout study.
Time Frame: After 68 relapse events
After 68 relapse events

Collaborators and Investigators

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

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

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

February 1, 2005

Primary Completion (Actual)

February 1, 2007

Study Completion (Actual)

February 1, 2008

Study Registration Dates

First Submitted

May 17, 2005

First Submitted That Met QC Criteria

May 17, 2005

First Posted (Estimate)

May 18, 2005

Study Record Updates

Last Update Posted (Estimate)

June 20, 2014

Last Update Submitted That Met QC Criteria

June 19, 2014

Last Verified

June 1, 2014

More Information

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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