Study to Evaluate the Efficacy, Safety, and Tolerability of Valbenazine as an Adjunctive Treatment for Schizophrenia

NCT ID: NCT05654870

Last Updated: 2024-11-12

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

TERMINATED

Clinical Phase

PHASE3

Total Enrollment

8 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-01-05

Study Completion Date

2023-11-08

Brief Summary

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This primary objective for this study is to evaluate the effect of adjunctive valbenazine versus placebo on symptoms of schizophrenia in participants who have inadequate response to antipsychotic treatment.

Detailed Description

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Conditions

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Schizophrenia

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors

Study Groups

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Valbenazine

Valbenazine once daily

Group Type EXPERIMENTAL

Valbenazine

Intervention Type DRUG

Oral treatment

Placebo

Placebo once daily

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type DRUG

Placebo matching valbenazine

Interventions

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Valbenazine

Oral treatment

Intervention Type DRUG

Placebo

Placebo matching valbenazine

Intervention Type DRUG

Other Intervention Names

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NBI-98854

Eligibility Criteria

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Inclusion Criteria

* Medically confirmed diagnosis of schizophrenia
* Participant is receiving a stable regimen of background antipsychotic medication
* Plasma levels for at least 1 of the participant's antipsychotic medications must be detectable by an available assay
* Participant is an outpatient with stable symptomatology
* Participant must have an adult informant (for example, a family member, relative, partner, social worker, caseworker, residential facility staff, or nurse)

Exclusion Criteria

* Has a history of treatment resistant schizophrenia
* Have a clinically significant unstable medical condition in the judgement of the investigator or any laboratory value outside the normal range that is considered by the investigator to be clinically significant at the screening visit
* Prior (within 6 months of Screening) or concomitant use of any vesicular monoamine transporter 2 (VMAT2) inhibitor (that is, valbenazine, reserpine, tetrabenazine, deutetrabenazine); or a history of intolerance to VMAT2 inhibitors
Minimum Eligible Age

13 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Neurocrine Biosciences

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Clinical Development Lead

Role: STUDY_DIRECTOR

Neurocrine Biosciences

Locations

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Neurocrine Clinical Site

San Jose, California, United States

Site Status

Neurocrine Clinical Site

Coral Gables, Florida, United States

Site Status

Neurocrine Clinical Site

Atlanta, Georgia, United States

Site Status

Countries

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United States

Other Identifiers

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NBI-98854-ATS3020

Identifier Type: -

Identifier Source: org_study_id

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