Medical Information Only. Always consult your healthcare provider before enrolling in any clinical trial.

NCT00518323 · ClinicalTrials.gov registry record · Phase 3

A Double-blind, Placebo-controlled Study of the Safety and Efficacy of Paliperidone Extended Release (ER) in the Treatment of Schizophrenia in Adolescent Patients

A Phase 3 study, sponsored by Johnson & Johnson Pharmaceutical Research & Development, L.L.C..

Completed
Registry status
Phase 3
Development phase
201
Enrollment target

NCT00518323: Completed Phase 3 study, sponsored by Johnson & Johnson Pharmaceutical Research & Development, L.L.C..

NCT00518323 is a Phase 3 study that has completed, run by Johnson & Johnson Pharmaceutical Research & Development, L.L.C.. The registered enrollment target is 201 participants, below the 772-participant average among 15,282 other Phase 3 trials with a reported enrollment target (74% lower). According to ClinicalTrials.gov, the official US trial registry.

View on ClinicalTrials.gov ↗

View your shortlist →

The verdict

NCT00518323, a Phase 3 study, has completed, sponsored by Johnson & Johnson Pharmaceutical Research & Development, L.L.C..

COMPLETED
Registry status
Phase 3
Development phase
201 participants
Enrollment target

Study Summary

The purpose of this study is to evaluate the efficacy, safety, and tolerability of 3 weight-based, fixed-dose groups of paliperidone extended release (ER) compared with placebo in adolescent patients between 12 to 17 years of age, who are diagnosed with schizophrenia. Paliperidone ER is an atypical antipsychotic agent approved by the U.S. Food and Drug Administration for the treatment of schizophrenia in adults. Patients may be voluntary inpatients or outpatients at the time of the screening visit, but should have returned to their usual living situation by Day 21 of the double-blind treatment phase. The study duration is approximately 10 weeks. Patients who have completed this study or who were discontinued from this study due to lack of efficacy but have completed at least 21 days of double-blind treatment and are expected to benefit from paliperidone treatment, may enter an optional open-label safety study.

Primary Outcome

The Positive and Negative Syndrome Scale (PANSS) measures the severity of psychotic symptoms of schizophrenia. Scores range from 30 to 210, where 30=best and 210=worst. The change in PANSS total score for all eligible subjects was measured from the beginning of the study to the end.

Interventions

  • DRUG Placebo
  • DRUG Paliperidone ER

Trial Details

FieldValue
Enrollment Target 201 participants
Start Date 2007-08
Est. Completion 2009-03
Phase Phase 3

What the finished NCT00518323 record still lists

NCT00518323 is an interventional study that assigns participants to a tested intervention. The registered 201 participants enrollment target is mid-sized for trials with a published cap, below the 772-participant average among 15,282 other Phase 3 trials with a reported enrollment target (74% lower).

The record links to 0 conditions, and to 2 interventions - of which Placebo is the first listed.

NCT00518323 does not publish any study locations in the registry export this page uses.

Frequently Asked Questions

What is clinical trial NCT00518323 about?

NCT00518323 is a clinical study titled "A Double-blind, Placebo-controlled Study of the Safety and Efficacy of Paliperidone Extended Release (ER) in the Treatment of Schizophrenia in Adolescent Patients". The purpose of this study is to evaluate the efficacy, safety, and tolerability of 3 weight-based, fixed-dose groups of paliperidone extended release (ER) compared with placebo in adolescent patients between 12 to 17 years of age, who are diagnosed with schizophrenia. Paliperidone ER is an atypical ...

What is the current status of trial NCT00518323?

This trial is currently completed. It is a Phase 3 study. The enrollment target is 201 participants. The study started on 2007-08. Estimated completion is 2009-03.

What interventions are being tested in trial NCT00518323?

The interventions under investigation include: Placebo (DRUG), Paliperidone ER (DRUG).

Who is sponsoring clinical trial NCT00518323?

This trial is sponsored by Johnson & Johnson Pharmaceutical Research & Development, L.L.C., which has 102 total clinical trials registered on ClinicalTrials.gov.

How this trial's enrollment target compares

Where NCT00518323's enrollment target sits among peer trials

201 1353rd of 2000 higher than 648 of 2,000 other Phase 3 trials

participants (enrollment target), bucketed by value

Each bar is a band; taller bars hold more other Phase 3 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source ClinicalTrials.gov registry export · 2026-08-08

Nationwide trials with similar profiles

Cross-condition peers matched on enrollment target and registry start date, not the same-condition list above.

Similar enrollment target

  • NCT04422652 · 201 participants · Phase 2

    Combination of Novel Therapies for CKD Comorbid Depression

  • NCT05327114 · 201 participants · Phase 2

    Efficacy and Safety Study of Nipocalimab for Adults With Chronic Inflammatory Demyelinating Polyneuropathy (CIDP)

  • NCT06099769 · 201 participants · Phase 2

    A Study of Enzalutamide, Enzalutamide in Combination With Mifepristone, or Chemotherapy in People With Metastatic Breast Cancer

  • NCT06274528 · 201 participants · Phase 2

    DORA and LP in Alzheimer's Disease Biomarkers

Similar registry start date

  • NCT05988463 · started 2027-01-01 · Phase 1

    Dose-Escalation Study of Artesunate Patients With IPF

  • NCT07219706 · started 2026-12-10 · NA

    Dietary Fiber and Time Restricted Eating

  • NCT02831335 · started 2026-12-01

    Technical Development of Multi-Parametric Renocerebral MRI

  • NCT05962346 · started 2026-12 · NA

    Fetal Endoscopic Tracheal Occlusion for Congenital Diaphragmatic Hernia

Source: ClinicalTrials.gov NCT00518323, the US trial registry maintained by the National Library of Medicine. NCT00518323 (mid enrollment · none site footprint · completed) retrieved and formatted by PlainTrial, see methodology.