An 8-week Open-label Study of an Accelerated and Slower Switching to Xanomeline/Trospium Following Atypical Antipsychotic Treatment in Participants With Schizophrenia

Starting soon · Phase 4

Conditions studied: Schizophrenia Disorders

In brief

The study design is a de-escalation of current atypical AP treatment to X/T at a maintenance dose of X/T established either at 100 mg xanomeline/20 mg trospium chloride BID (total daily dose 200 mg xanomeline/40 mg trospium chloride) or 125 mg xanomeline/30 mg trospium chloride BID (total daily dose 250 mg xanomeline/60 mg trospium chloride) based on participants' clinical response and/or tolerability. While the package insert for X/T provides guidance for clinicians on dosing, this study is designed to assess how transitioning will occur in the "real world" situation.

Key facts

Study ID

NCT06924255

Run by

Collaborative Neuroscience Research, LLC

People needed

100

Starts

2025-04-01

Expected to finish

2025-12-01

Last updated by the study team

2025-04-11

Who can join

Age: 18 and older, up to 65. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Participant is aged 18 to 65 years, inclusive, at Screening.
• Participant is capable of providing informed consent.
• A signed informed consent form (ICF) must be provided before any study assessments are performed.
• Participant must be fluent in English (oral and written) as the language of the ICF to consent. No translations will be permitted.
• Participant has a primary diagnosis of schizophrenia established by a comprehensive psychiatric evaluation based on the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) (American Psychiatric Association 2013) criteria and confirmed by MINI for Schizophrenia and Psychotic Disorder Studies version 7.0.2.
• Participant has not required psychiatric hospitalization, acute crisis intervention, or other increase in level of care due to symptom exacerbation within 12 weeks of Screening and is psychiatrically stable in the opinion of the Investigator.
• PANSS Total Score of ≤80 at Screening and Baseline Visits.
• a. Score of ≤4 for the following core Positive Subscale items on PANSS: i. Item 2 (P2): Conceptual disorganization ii. Item 7 (P7): Hostility
• CGI-S score of ≤4 at Screening and Baseline Visits.
• Participant must be judged by the Investigator to be an appropriate candidate for transitioning from current oral AP medication due to safety or tolerability concerns and/or insufficient efficacy.
• Participant is taking an oral AP and the AP regimen has been stable for at least 6 weeks prior to Screening. Participants are permitted to remain on non-prohibited (see Section 5.2, Exclusion Criterion #14, and Section 7.8) psychotropic medications (that are not secondary AP treatments) other than the primary pre-switch AP that have been part of their ongoing treatment regimen.
• For at least 6 weeks prior to Screening, the participant must be taking a single oral atypical AP medication at a dose and frequency consistent with the drug label. Low dose quetiapine (e.g., taken for sleep) taken in the 6 week prior to Screening is not exclusionary but must be discontinued by the Baseline Visit.
• Participant must be currently treated with one of the following selected atypical oral AP at the same dosing regimen at package insert specified dose range for schizophrenia for ≥6 weeks:
• Risperidone
• Paliperidone
• Aripiprazole
• Ziprasidone
• Quetiapine
• Lurasidone
• Lumateperone
• Brexpiprazole
• Olanzapine No participants taking first-generation (typical) AP are to be included in the study.
• In the opinion of the Investigator, it is clinically appropriate for the participant to discontinue current AP therapy and initiate treatment with X/T.
• Participant is willing and able, in the opinion of the Investigator, to discontinue all secondary AP medications prior to Baseline visit.
• BMI must be ≥18 and ≤40 kg/m2.

You may not qualify if…

• Any primary DSM-5 disorder other than schizophrenia within 6 months before Screening (confirmed using MINI version 7.0.2 at Screening). Exclusionary disorders include, but are not limited to, major depressive disorder, bipolar I or II disorder, schizoaffective disorder, obsessive compulsive disorder, and posttraumatic stress disorder. Symptoms of mild mood dysphoria or anxiety are allowed as long as these symptoms are not the primary focus of treatment.
• Participant has a history of moderate to severe alcohol use disorder or a substance (other than nicotine or caffeine) use disorder within the past 6 months or a positive urine drug screen (UDS) for a substance other than cannabis at Screening or Baseline.
• Participants with mild substance use disorder within the 6 months before Screening must be discussed and agreed upon with the Principal Investigator (PI) before they can be allowed into the study.
• Participants with positive UDS for cannabis are permitted to enroll in the study provided that the participants' pattern of use is not indicative of a substance use disorder.
• Urine toxicology screen positive for phencyclidine, amphetamines, opiates, cocaine, or alcohol (clinically significant alcohol use in the opinion of the Investigator).
• History or presence of clinically significant cardiovascular (e.g., untreated or unstable hypertension, clinically significant tachycardia), pulmonary, renal, hematologic, gastrointestinal (GI, e.g., obstructive disorders [including conditions that may decrease GI motility, such as ulcerative colitis, intestinal atony, and myasthenia gravis], endocrine, immunologic, dermatologic, neurologic, or oncologic disease or any other condition that, in the opinion of the Investigator, would jeopardize the safety of the participant or the validity of the study results.
• Participant with cirrhosis, biliary duct abnormalities, and/or hepatobiliary carcinoma based on either medical history or liver function test results.
• All grades of hepatic impairment (mild [Child-Pugh Class A], moderate [Child-Pugh Class B], and severe [Child-Pugh Class C]).
• History or high risk of urinary retention or gastric retention.
• History of narrow-angle glaucoma.
• History of irritable bowel syndrome (with or without constipation) or serious constipation requiring treatment within the last 6 months.
• Risk for suicidal behavior during the study as determined by the Investigator's clinical assessment. Non-suicidal self-injurious behavior is not exclusionary.
• Clinically significant abnormal finding on the physical examination, medical history, or clinical laboratory results at Screening.
• An eGFR of < 60 mL/min
• Elevations in hepatic transaminases at screening ≥3× ULN for ALT and AST and/or bilirubin > 2× ULN, unless in the context of Gilbert's syndrome
• History of unstable hypertension or tachycardia as evidenced by:
• Blood pressure of ≥160/100 mmHg (single seated measure) at screening
• Heart rate of ≥110 bpm (single seated measure) at Screening
• Participant is receiving other psychotropic medications for psychiatric and neurological conditions with Anticholinergic Risk Scale (ARS) scores >1 (tricyclic antidepressants, paroxetine, antispasmodics, antihistamines with anticholinergic properties).
• History of treatment resistance to schizophrenia medications defined as:
• Failure to respond to 2 adequate courses of pharmacotherapy (a minimum of 4 weeks at an adequate dose per the label) within the past 12 months OR
• Has a history of having received clozapine
• Participant is receiving a long-acting injectable AP.
• Developmental disorder, intellectual disability, or autism spectrum disorder (by history), with the exception of participants diagnosed with autism at age <18 due to historic diagnostic criteria precluding schizophrenia diagnoses of minors (at discretion of Investigator).
• Lifetime history of clinically significant head trauma.

Where it is running

• CenExel CIT LA — Bellflower, California, United States
• CenExel CNS - Garden Grove — Garden Grove, California, United States
• CenExel CIT IE — Riverside, California, United States
• CenExel CNS - Torrance — Torrance, California, United States
• CenExel RCA — Hollywood, Florida, United States
• CenExel CBH — Gaithersburg, Maryland, United States
• CenExel HRI Marlton — Marlton, New Jersey, United States

Full record on ClinicalTrials.gov

Trial information comes from ClinicalTrials.gov and is refreshed daily. TrialsForMe does not provide medical care and does not run the studies it lists.