Envision Trials LLC | Bonita Springs, FL
Status and phase
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About
This is a Phase 3, 38-week, randomized, double-blind, placebo-controlled, multicenter, outpatient study in subjects with psychosis associated with Alzheimer's Disease.
The primary objective of the study is to evaluate relapse prevention in subjects with psychosis associated with Alzheimer's Disease treated with KarXT compared to placebo. The secondary objectives of the study are to evaluate the time from randomization to discontinuation for any reason and safety and tolerability in subjects with psychosis associated with Alzheimer's Disease treated with KarXT compared to placebo.
Enrollment
Sex
Ages
Volunteers
Inclusion criteria
Is aged 55 to 90 years, inclusive, at Screening
Can understand the nature of the study and protocol requirements and provide a signed informed consent form before any study assessments are performed. If the subject is deemed not competent to provide consent, the following requirements for consent must be met.
Meets clinical criteria for possible or probable Alzheimer's Disease
Has a Magnetic Resonance Imaging (MRI) or Computed Tomography (CT) scan of the brain (completed within the past 5 years) taken during or subsequent to the onset of dementia to rule out other central nervous system (CNS) disease that could account for the dementia syndrome. If not available, a non-contrast brain MRI or non-contrast head CT must be done during screening.
Living at the same home or residential assisted-living facility for a minimum of six weeks before Screening
Capable of self-locomotion (alone or with the aid of an assistive device) and have an identified or proxy caregiver (spends approximately 10 hours/week with the subject) that is willing to:
History of psychotic symptoms (meeting International Psychogeriatric Association [IPA] criteria) for at least 2 months prior to Screening.
Clinical Global Impressions-Severity (CGI-S) scale with a score ≥4 (moderate) at Screening and Baseline. CGI-S requires the assessor to consider aspects of the psychosis prior to providing a global assessment of severity. These aspects include hallucinations and delusions.
Subjects are required to meet at least one of the following criteria at Screening and Baseline:
Mini-Mental State Examination (MMSE) score of 8 to 22, inclusive, at Screening
If the subject is taking a cholinesterase inhibitor and/or memantine, they must have been on a stable dose for 6 weeks prior to Screening and be willing to maintain a stable dose for the duration of the study.
Subject is willing and able to visit the clinic in an outpatient setting for the study duration, follow instructions, and comply with the protocol requirements
BMI must be within 18 to 40 kg/m2 inclusive
Female subjects must not be pregnant or breastfeeding. Women of childbearing potential (WOCBP), or men whose sexual partners are WOCBP, must be able and willing to use at least 1 highly effective method of contraception during the study and for at least 1 menstrual cycle (e.g., 30 days) after the last dose of IMP or matching placebo. Sperm donation is not allowed for 30 days after the final dose of the IMP or matching placebo.
Exclusion criteria
Psychotic symptoms that are primarily attributable to a condition other than the Alzheimer's Disease causing dementia
History of major depressive episode with psychotic features during the 12 months prior to Screening
History of a diagnosis of bipolar disorder, schizophrenia, or schizoaffective disorder
Significant or severe medical conditions including pulmonary, hepatic, renal, hematologic, gastrointestinal, endocrine, immunologic, dermatologic, neurologic, cardiovascular or oncologic disease, or any other condition 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
Significant or severe renal impairment based on a screening cutoff for Estimated Glomerular Filtration Rate (eGFR) of <60 mL/min/1.73 m2
History of ischemic stroke within 12 months prior to Screening or any evidence of hemorrhagic stroke
History of cerebral amyloid angiopathy, epilepsy, central nervous system neoplasm, unstable thyroid function, or unexplained syncope
Any of the following:
Myocardial infarction within the 6 months prior to Screening
Personal or family history of symptoms of long QT syndrome as evaluated by the investigator
Human immunodeficiency virus, cirrhosis, biliary duct abnormalities, hepatobiliary carcinoma, and/or active hepatic viral infections as indicated by medical history or liver function tests results
History or high risk of urinary retention, gastric retention, or narrow-angle glaucoma as evaluated by the investigator
For males only, any one of the following:
History of irritable bowel syndrome (with or without constipation) or serious constipation requiring treatment within the last 6 months
Risk of suicidal behavior during the study as determined by clinical assessment and/ or C-SSRS
Clinically significant abnormal finding on the physical examination, electrocardiogram, or clinical laboratory results at Screening
Urine toxicology screen is positive substances other than cannabis or benzodiazepines (both cannabis and short-or medium-acting benzodiazepines are allowed in limited quantities during the study) unless approval has been given by the Medical Monitor
Recent history of receiving monoamine oxidase inhibitors, anticonvulsants (e.g., lamotrigine, divalproex), lithium, tricyclic antidepressants (e.g., imipramine, desipramine), or any other psychoactive medications except for as-needed anxiolytics (e.g., lorazepam, chloral hydrate)
If, in the opinion of the Investigator and/or Sponsor/Medical Monitor, subject is unsuitable for enrollment in the study or subject has any finding that, in the view of the Investigator and/or Sponsor/ Medical Monitor, may compromise the safety of the subject or affect his/her ability to adhere to the protocol visit schedule or fulfill visit requirements
Positive test for coronavirus (COVID-19) within 2 weeks before or at Screening; antigen or PCR local testing can be done at the discretion of the Investigator
Unable to taper and discontinue a concomitant medication that would preclude participation in the study
Prior exposure to KarXT
Experienced any significant adverse events due to trospium, including a known hypersensitivity to trospium
Participation in another clinical study in which the subject received an experimental or investigational drug within 3 months before Screening or has participated in more than 2 clinical studies in the past year
Primary purpose
Allocation
Interventional model
Masking
380 participants in 2 patient groups, including a placebo group
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Central trial contact
First line of the email MUST contain the NCT# and Site #.; BMS Clinical Trials Contact Center www.BMSClinicalTrials.com
Data sourced from clinicaltrials.gov
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