A Randomized, Double-blind, Placebo-controlled, Parallel-group Study of Cariprazine (RGH-188) in the Prevention of Relapse in Patients With Schizophrenia
Overview
- Phase
- Phase 3
- Intervention
- Cariprazine
- Conditions
- Schizophrenia
- Sponsor
- Forest Laboratories
- Enrollment
- 765
- Locations
- 73
- Primary Endpoint
- Time From Baseline to the First Symptom Relapse During the Double-blind Phase
- Status
- Completed
- Last Updated
- 7 years ago
Overview
Brief Summary
The objective of this study is to evaluate the efficacy and safety of cariprazine relative to placebo in the prevention of relapse of symptoms in participants with schizophrenia.
Detailed Description
There were 3 periods (phases) in the study. The Open-label Phase lasted 20 weeks. In the first 6 weeks, participants received 3, 6, or 9 mg cariprazine orally once a day; the dose could be modified during this time. The cariprazine dose was fixed at 3, 6, or 9 mg for the last 14 weeks of this Open-label Phase. At the end of Week 8, participants had to meet the following criteria to continue in the study. * Positive and Negative Syndrome Scale (PANSS) total score ≤ 60 at the end of Week 8 * At least 20% decrease in PANSS total score from baseline to the end of Week 8 * Clinical Global Impressions - Severity (CGI-S) score ≤ 4 at the end of Week 8 * Score of ≤ 4 on each of the following 7 PANSS items: P1, P2, P3, P6, P7, G8, and G14 at the end of Week 8 * Stable dose during the previous 2 weeks * No significant tolerability issues as judged by the Investigator at the end of Week 8 At the end of the Open-label Phase, participants were randomized into 2 treatment groups, cariprazine or placebo, if they met the following criteria: * PANSS total score ≤ 60 at the end of Week 20 * At least 20% decrease in PANSS total score from baseline to the end of Week 20 * CGI-S score ≤ 4 at the end of Week 20 * Score of ≤ 4 on each of the following 7 PANSS items: P1, P2, P3, P6, P7, G8, and G14 at the end of Week 20 * No significant tolerability issues as judged by the Investigator During this Double-blind Treatment Phase, participants received either placebo or cariprazine at the same dosage (3, 6, or 9 mg) that they received during the last 14 weeks of the Open-label Phase. All participants entered the 4 week Safety Follow-up Phase. They received a treatment other than the investigational product at the discretion of the Investigator.
Investigators
Eligibility Criteria
Inclusion Criteria
- •Participants who have provided informed consent prior to any study specific procedures.
- •Participants currently meeting the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition - Text Revision (DSM-IV-TR) criteria for schizophrenia.
- •Participants with normal physical examination, laboratory, vital signs, and/or electrocardiogram (ECG).
- •Diagnosis of schizophrenia for a minimum of 1 year before Visit 1 (Screening).
- •Positive and Negative Syndrome Scale (PANSS) total score ≥ to 70 and ≤ 120 at Visit 1 (Screening) and Visit 2 (beginning of Run-in Phase).
- •Negative serum B-human chorionic gonadotropin (B-hCG) pregnancy test (applies to female participants of childbearing potential only).
- •Body mass index between 18 and 40 kg/m\^2, inclusive.
Exclusion Criteria
- •Participants currently meeting DSM-IV-TR criteria for schizoaffective disorder, schizophreniform disorder, bipolar I and II and known or suspected borderline or antisocial personality disorder. or other DSM-IV-TR axis II disorders.
- •Participants in their first episode of psychosis.
- •Treatment-resistant schizophrenia over the last 2 years.
- •Positive result from the blood alcohol test or from the urine drug screen for any prohibited medication.
- •At imminent risk of injuring self or others or causing significant damage to property.
- •Suicide risk.
Arms & Interventions
Cariprazine - Open-label Phase
Participants received 3, 6, or 9 mg cariprazine orally once a day for 6 weeks; the dose could be modified during this time. The cariprazine dose was fixed at 3, 6, or 9 mg for the last 14 weeks of this 20 week Open-label Phase.
Intervention: Cariprazine
Placebo - Double-blind Treatment Phase
Participants received placebo orally once a day for 26 to 72 weeks.
Intervention: Placebo
Cariprazine - Double-blind Treatment Phase
Participants received 3, 6, or 9 mg cariprazine orally once a day for 26 to 72 weeks
Intervention: Cariprazine
Outcomes
Primary Outcomes
Time From Baseline to the First Symptom Relapse During the Double-blind Phase
Time Frame: Up to 34 Weeks and Bi-Weekly thereafter until Week 92
Relapse was defined as meeting ≥1 of the following criteria:1-Hospitalization due to worsening of condition;2-increase in Positive and Negative Syndrome Scale(PANSS) total score by ≥30% for participants,scored ≥50 or a ≥10-point increase for participants,scored \<50 at randomization;3-increase in Clinical Global Impressions-Severity(CGI-S) score by ≥2 points at Week 20;4-deliberate self-injury or aggressive behaviour;5-suicidal/homicidal ideation judged clinically significant by Investigator;6-score of \>4 on 1 or more of following PANSS items:P1,P2,P3,P6,P7,G8 or G14. Second assessment not performed based on Investigator discretion. PANSS is 30-item rating scale. Each item scored on 7-point scale. Total score ranges from 30 to 210. Lower score indicates fewer schizophrenic symptoms. CGI-S is 7-point scale,measures severity of participant's illness in comparison with others with same diagnosis. Lower score indicates less severe illness. 25th percentile for time to relapse was reported.