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NCT Number: NCT05980949

Open-Label Extension Study to Assess the Long-Term Safety and Tolerability of KarXT in Subjects With Psychosis Associated With Alzheimer's Disease (ADEPT-3)

This is a Phase 3 global, multicenter, 52-week, open-label extension (OLE) rollover study for subjects completing study CN012-0026, CN012-0027 or CN012-0056. Subjects (randomized or non-randomized) who complete the 38-week CN012-0026 study, 14-week CN012-0027 study or 14-week CN012-0056 study will be eligible to enroll in CN012-0028. The primary objective of the study is to assess the long-term safety and tolerability of KarXT in subjects with psychosis associated with Alzheimer's Disease.

Recruiting

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Key information

Age range

55 year–90 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 3

Primary location

Local Institution - 5001, Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina

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Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Must have completed study KAR-031 (CN012-0026), KAR-032(CN012-0027), or CN012-0056. This Inclusion criterion is not applicable for Protocol Amendment 07 or later versions.
  • Can understand the nature of the study and protocol requirements and provide a signed informed consent (IC) form before any study assessments are performed. If the subject is deemed not competent to provide IC, both the following requirements for consent must be met:
  • The subject's legally acceptable representative (LAR) must provide IC
  • The subject must provide informed assent
  • Must have stable living environment. At entry into this study, or any time during the study, if a subject needs to relocate from home, a residential assisted-living facility, or other stable location to a nursing home facility, the Sponsor/Medical Monitor must approve the subject's participation in the study.

Exclusion criteria

  • Significant or severe medical conditions that, in the opinion of the Investigator, could jeopardize the safety of the subject, ability to complete or comply with the study procedures or validity of the study results.
  • Clinically significant abnormalities, including any finding(s) from the ECG, laboratory tests, physical examination, or vital signs, at the EOT visit of Study KAR-031 (Visit 19), Study KAR-032 (Visit 12), Study CN012-0056 (Visit 12) that the Investigator, in consultation with the Medical Monitor, are considered to jeopardize the safety of the subject.
  • Subjects participating in another investigational drug or device study or planning on participating in another clinical study during the duration of KAR-033.
  • Other protocol-defined Inclusion/Exclusion criteria apply.

Treatment and study plan

KarXT

Drug

KarXT 20/2 mg TID (total daily dose [TDD] 60/6 mg) KarXT 30/3 mg TID (TDD 90/9 mg) KarXT 40/4 mg TID (TDD 120/12 mg) KarXT 50/5 mg TID (TDD 150/15 mg) KarXT 66.7/6.67 mg TID (TDD 200/20 mg)

Primary outcomes

  1. Incidence of treatment-emergent adverse events (TEAEs)

    Time frame: From initial dose through 14 days after the final dose (up to 54 weeks)

    The number and percentage of participants with TEAEs will be determined

Secondary outcomes

  1. Incidence of serious TEAEs

    Time frame: From initial dose through 14 days after the final dose (up to 54 weeks)

    The number and percentage of participants with serious TEAEs will be determined

  2. Incidence of TEAEs leading to withdrawal

    Time frame: From initial dose through 14 days after the final dose (up to 54 weeks)

    The number and percentage of participants with TEAEs leading to withdrawal will be determined

Study contacts

Contact information is provided by the study sponsor or research team.

BMS Clinical Trials Contact Center www.BMSClinicalTrials.com

CONTACT

[email protected]

855-907-3286

First line of the email MUST contain NCT # and Site #.

CONTACT

Sponsors and collaborators

Lead sponsor

Karuna Therapeutics, Inc., a Bristol Myers Squibb company

Industry

Registry information

Important dates

Study start
2023
Primary completion
2027
Study completion
2027
First posted
Aug 8, 2023
Registry last updated
Jul 6, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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