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A Study to Evaluate the Efficacy and Safety of KarXT for the Treatment of Manic Episodes in Bipolar-I Disorder

A Phase 3, Randomized, Double-blind, Placebo-controlled Study to Evaluate the Efficacy and Safety of KarXT for the Treatment of Manic Episodes in Bipolar-I Disorder (BALSAM-1)

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06951698
Acronym
BALSAM-1
Enrollment
274
Registered
2025-04-30
Start date
2025-06-11
Completion date
2026-11-01
Last updated
2026-09-04

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Bipolar-I Disorder With Mania or Mania With Mixed Features

Keywords

Bipolar-I, Mania, Mixed

Brief summary

The purpose of this study is to evaluate the efficacy and safety of KarXT for the treatment of manic episodes in Bipolar-I Disorder

Detailed description

This is a Phase 3, randomized, double-blind, placebo-controlled, multicenter, inpatient study in subjects with bipolar disorder experiencing an acute episode of mania or mania with mixed features. The primary objective of the study is to evaluate the efficacy of KarXT compared to placebo in treating symptoms of mania during a 3-week inpatient period. The duration of the study including screening, the double-blind inpatient treatment period and safety-follow-up is no more than seven weeks.

Interventions

DRUGKarXT

Specified dose on specified days

OTHERPlacebo

Specified dose on specified days

Sponsors

Bristol-Myers Squibb
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

* Participants must have a primary diagnosis of Bipolar-I disorder established by a comprehensive psychiatric evaluation. * Participants must be experiencing an acute episode or relapse of mania or mania with mixed features (≤ 3 weeks). * Participants must require hospitalization for the acute exacerbation or relapse of mania. * Participants must have all psychotropic medications washed out in no more than 14 days prior to the first dose of the study drug. * Participants must have a Young Mania Rating Scale (YMRS) score of ≥ 20 at Screening and at Baseline. * Participants must have a Clinical Global Impressions-Bipolar (CGI-BP) ≥ 4 at Screening and at Baseline.

Exclusion criteria

* Participants must not have any primary Diagnostic and Statistical Manual of Mental Disorders (5th Edition, Text Revision) (DSM-5-TR) disorder, other than BP-I with mania or mania with mixed features within 12 months before screening, including BP-I with depression (for previous 3 months only), BP-II disorder, borderline personality disorder, major depressive disorder, and primary psychotic disorder, with the exception of mild anxiety disorders. * Participants must not have a primary diagnosis of BP-I with rapid cycling (≥ 4 distinct mood episodes in one year). * Participants must not have a DSM-5-TR diagnosis of moderate to severe substance use disorder (except tobacco use disorder) within the 12 months before screening, or current use as determined by urine toxicology screen or alcohol test. * Participants must not be at risk for suicidal behavior at screening or the baseline visit as determined by the Investigator's clinical assessment and the Columbia-Suicide Severity Rating Scale (C-SSRS). * Participants must not have a history of irritable bowel syndrome (with or without constipation) or serious constipation requiring treatment within the last 6 months. * Participants must not have a history or high risk of urinary retention, gastric retention, or untreated narrow-angle glaucoma. * Other protocol-defined Inclusion/

Design outcomes

Primary

MeasureTime frameDescription
Change from baseline in Young Mania Rating Scale (YMRS) scoreAt week 3The YMRS comprised of 11 items that assess the severity of manic symptoms. All items are given a severity rating, with 4 items graded from 0 to 8 (irritability, speech, thought content, and disruptive/aggressive behavior), and the remaining 7 items are graded from 0 to 4 points. The highest score obtainable on the YMRS is 60 and the higher the number the greater the number of symptoms and/or the greater their severity.

Secondary

MeasureTime frameDescription
Change from baseline in Clinical Global Impressions-Bipolar (CGI-BP)At week 3The CGI-BP is designed to assess the severity, improvement, and efficacy of treatment in individuals with bipolar disorder. Only section I, illness severity, will be used, which includes three components: mania, depression, and overall bipolar illness. The ratings are on a 7-point scale (1 = normal, not ill; 2 = minimally ill; 3 = mildly ill; 4 = moderately ill; 5 = markedly ill; 6 = severely ill; 7 = very severely ill)
Occurrence of response based on a ≥ 50% decrease from baseline in YMRS total scoreAt week 3
Occurrence of response based on CGI-BP change from baseline ≥ 1At week 3

Countries

Argentina, Australia, Bulgaria, Hungary, Japan, New Zealand, Poland, Ukraine, United States

Contacts

CONTACTBMS Clinical Trials Contact Center www.BMSClinicalTrials.com
Clinical.Trials@bms.com855-907-3286
CONTACTFirst line of the email MUST contain NCT # and Site #.
STUDY_DIRECTORBristol-Myers Squibb

Bristol-Myers Squibb

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 5, 2026