A Comparative Study of Paliperidone Palmitate and Risperidone Long Acting Injection (LAI) in Participants With Schizophrenia

Xian-Janssen Pharmaceutical Ltd.452 enrolled

Overview

The purpose of this study is to compare the efficacy of paliperidone palmitate and risperidone long acting injection (LAI) in participants with schizophrenia (psychiatric disorder with symptoms of emotional instability, detachment from reality, often with delusions and hallucinations, and withdrawal into the self) along with safety and tolerability.

This is a randomized (assigned by chance), open-label (all people know the identity of the intervention), active-controlled, parallel-group (a medical research study comparing the response in two or more groups of participants receiving different treatments), multicenter (when more than one hospital or medical school team work on a medical research study) comparative study in participants with schizophrenia. This study comprises a screening period of not more than 7 days and a 13-week open-label treatment period. Paliperidone palmitate will be administered as intramuscular injection (injection of a substance into a muscle) of 150 milligram equivalent (mg eq.) at baseline, 100 mg eq. at Day 8, flexible dose on Day 36 (50 or 100 mg eq.) and on Day 64 (50, 100 or 150 mg eq.) depending on investigator's discretion. Risperidone LAI will be administered at a dose of 25 mg at Day 8 and Day 22, flexible dose on Day 36 (25 or 37.5 mg) and Day 64 (25, 37.5, or 50 mg). Dose on Day 50 is the same as Day 36 and dose on Day 78 is the same as Day 64. Participants will receive oral risperidone tablets (1 to 6 mg/day) for the first 4 weeks of the open-label treatment period. Each participant may receive oral risperidone tablets (1 to 2 mg daily) for up to 3 weeks at Day 36 and Day 64 if the dose of risperidone LAI was increased on Day 36 and Day 64. Efficacy will primarily be assessed using the Positive and Negative Syndrome Scale (PANSS). Participants' safety will also be assessed.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Enrollment

452

Conditions

Schizophrenia

Interventions

Paliperidone palmitate (R092670)DRUG

Paliperidone palmitate suspension for intramuscular injection at a dose of 150 milligram equivalent (mg eq.) at baseline, 100 mg eq. on Day 8, flexible dose, either 50 or 100 mg eq on Day 36 and 50, 100, or 150 mg eq.on Day 64 depending on investigator's discretion.

RisperidoneDRUG

Risperidone LAI intramuscular at a dose of 25 mg on Day 8 and Day 22; flexible dose of either 25 or 37.5 mg on Day 36 with same dose on Day 50; and either 25, 37.5, or 50 mg on Day 64 with same dose on Day 78; along with oral risperidone 2 mg tablet on Day 1, flexible doses (1-6 mg/day) for first 28 days; and 1-2 mg/day during Day 36-57 and Day 64-85 if the dose of risperidone LAI was increased on Day 36 and Day 64.

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Participants who meet diagnostic criteria for schizophrenia according to Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) (disorganized type \[295.10\], catatonic type \[295.20\], paranoid type \[295.30\], residual type \[295.60\], or undifferentiated type \[295.90\]) for at least 1 year before screening and prior medical records, written documentation, or verbal information obtained from previous psychiatric providers obtained by the investigator must be consistent with the diagnosis of schizophrenia * A total Positive and Negative Syndrome Scale (PANSS) score between 60 and 120, inclusive, at screening and baseline * Body mass index (BMI) of equal to or greater than 17.0 kilogram per meter square (kg/m\^2) * Female participants must be postmenopausal for at least 2 years, surgically sterile, abstinent, or, if sexually active, be practicing an effective method of birth control before study entry and throughout the study * Be capable of self-administering study medication (applies to oral supplementation) or have assistance with study medication administration consistently available throughout the first 4 weeks of the study Exclusion Criteria: * A primary, active DSM-IV diagnosis on Axis I other than schizophrenia * A decrease of at least 25 percent in the total PANSS score between screening and baseline * Participants who have previously participated in this study * A DSM-IV diagnosis of active substance dependence within 3 months before screening (nicotine and caffeine are not exclusionary) * History of treatment resistance as defined by failure to respond to 2 adequate treatments with different antipsychotic medications (an adequate treatment is defined as a minimum of 6 weeks at maximum tolerated dosage)

Locations (8)

Unnamed facility

Baoding, China

Unnamed facility

Beijing, China

Unnamed facility

Guangzhou, China

Unnamed facility

Hangzhou, China

Unnamed facility

Outcomes

Primary Outcomes

Change From Baseline in Positive and Negative Syndrome Scale (PANSS) Total Score at Day 92 or Early Withdrawal

The PANSS provides a total score (sum of the scores of all 30 items) and scores for 3 subscales, the positive subscale (7 items), the negative subscale (7 items), and the general psychopathology subscale (16 items), each rated on a 7-point scale that ranges from 1 (absent) to 7 (extreme). The PANSS total score consists of the sum of all 30 PANSS items and ranges from 30 (absent) to 210 (extreme psychopathology). Higher change scores indicate worsening.

Time frame: Baseline, Day 92 or early withdrawal

Secondary Outcomes

Change From Baseline in Personal and Social Performance (PSP) Score at Day 92 or Early Withdrawal

This PSP assesses the degree of a participant's dysfunction within 4 domains of behavior: socially useful activities, personal and social relationships, self-care, and disturbing and aggressive behavior. The score ranges from 1 to 100, divided into 10 equal intervals to rate the degree of difficulty (1, absent to 4, very severe) in each of the 4 domains. Based on the four domains there will be one total score. Participants with a score of 71 to 100 have a mild degree of difficulty; from 31 to 70, varying degrees of disability; \<= 30, functioning so poorly as to require intensive supervision.

Time frame: Baseline, Day 92 or early withdrawal

Change From Baseline in Clinical Global Impression-Severity (CGI-S) Score at Day 92 or Early Withdrawal

The CGI-S rating scale is a 7 point global assessment that measures the clinician's impression of the severity of illness exhibited by a participant. A rating of 1 is equivalent to "Normal, not at all ill" and a rating of 7 is equivalent to "Among the most extremely ill participants". Higher change scores indicate worsening.

Time frame: Baseline, Day 92 or early withdrawal

Change From Baseline in the Sleep Visual Analog Scale (VAS) Score at Day 92 or Early Withdrawal

The self-administered sleep VAS scale (0-100 millimeter \[mm\]) rates quality of sleep (QoS) and daytime drowsiness (DD). Participants indicate mark on the scale to represent how well they have slept in the previous 7 days, score ranges from 0 mm (very badly) to 100 mm (very well); and how often they have felt drowsy within the previous 7 days, from 0 mm (not at all) to 100 mm (all the time).

Data from ClinicalTrials.gov

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