A Study to Assess Efficacy and Safety of KarXT in Acutely Psychotic Hospitalized Adult Patients With Schizophrenia (EMERGENT-2)

Summary

This is a Phase 3, randomized, double-blind, parallel-group, placebo-controlled, multicenter inpatient study to examine the efficacy and safety of KarXT in adult subjects who are acutely psychotic with a Diagnostic and Statistical Manual Fifth Edition (DSM-5) diagnosis of schizophrenia. The primary objective of the study is to assess the efficacy of KarXT (a fixed combination of xanomeline 125 mg and trospium chloride 30 mg twice daily \[BID\]) versus placebo in reducing Positive and Negative Syndrome Scale (PANSS) total scores in adult inpatients with a DSM-5 diagnosis of schizophrenia. The secondary objectives of the study are to evaluate improvement in disease severity and symptoms, safety and tolerability, and pharmacokinetics in adult inpatients with a DSM-5 diagnosis of schizophrenia.

Timeline

Start

2020-12-16

Primary completion

2022-05-24

Completion

2022-05-24

Outcome

Met primary endpoint

paper The trial met the primary endpoint with a mean change from baseline to week 5 in PANSS total score that favoured KarXT PMID 38104575 ↗

registry analysis (superiority test); KarXT vs Placebo; p <0.0001; LS mean difference -9.6 (95% CI -13.9 to -5.2); NCT04659161 ↗

Publications

• Yeung PP, Breier A, Zhu H, Kaul I, Marcus RN. Xanomeline and Trospium Chloride for the Treatment of Agitation Associated With Schizophrenia: PANSS-Excited Component Results From 3 Randomized, Double-Blind, Placebo-Controlled EMERGENT Trials. J Clin Psychiatry. 2025 Mar 24;86(2):24m15668. doi: 10.4088/JCP.24m15668.
• Citrome L, Neugebauer NM, Meli AA, Kando J. Xanomeline and Trospium Chloride Versus Placebo for the Treatment of Schizophrenia: A Post Hoc Analysis of Number Needed to Treat, Number Needed to Harm, and Likelihood to Be Helped or Harmed. Neuropsychiatr Dis Treat. 2025 Apr 5;21:761-773. doi: 10.2147/NDT.S503494. eCollection 2025.
• Kaul I, Claxton A, Sawchak S, Sauder C, Brannan SK, Raj E, Ruan S, Konis G, Brown D, Cutler AJ, Marcus R. Safety and Tolerability of Xanomeline and Trospium Chloride in Schizophrenia: Pooled Results From the 5-Week, Randomized, Double-Blind, Placebo-Controlled EMERGENT Trials. J Clin Psychiatry. 2025 Feb 26;86(1):24m15497. doi: 10.4088/JCP.24m15497.
• Kaul I, Sawchak S, Correll CU, Kakar R, Breier A, Zhu H, Miller AC, Paul SM, Brannan SK. Efficacy and safety of the muscarinic receptor agonist KarXT (xanomeline-trospium) in schizophrenia (EMERGENT-2) in the USA: results from a randomised, double-blind, placebo-controlled, flexible-dose phase 3 trial. Lancet. 2024 Jan 13;403(10422):160-170. doi: 10.1016/S0140-6736(23)02190-6. Epub 2023 Dec 14.

Drugs

Evaluation	Drug	Modality	Dose	Route
Subject	Trospium	Small molecule	20 mg	Oral
Subject	Trospium	Small molecule	30 mg	Oral
Subject	Xanomeline	Small molecule	100 mg	Oral
Subject	Xanomeline	Small molecule	125 mg	Oral

Indications