Participants (or caregiver/legal guardian) must have signed and dated an Institutional Review Board (IRB)/Independent Ethics Committee (IEC)-approved written ICF or signed an electronic ICF in accordance with regulatory, local, and institutional guidelines.

Adults ≥ 18 years of age at Baseline who are willing and able, in the judgement of the treating clinician, to participate in routine clinical care and follow up.

Schizophrenia, confirmed by the treating clinician's judgement or physician decision to treat the patient with receiving xanomeline and trospium chloride (KarXT) for schizophrenia made prior to and independently of participation in this study. Current Antipsychotic Treatment: Participant must fall into one of the categories below:

• Be within <16 weeks of initiating treatment with KarXT with intent to discontinue prior antipsychotic treatment(s) OR
• On a stable regimen (dose and frequency consistent with the drug label and/or at a stable dose based on the judgement of the Investigator for at least 30 days prior to screening) of treatment with 1 or more antipsychotics with plan to discontinue and switch to treatment with KarXT from a prior antipsychotic treatments(s). NOTE: The decision to switch for reasons of safety, tolerability, and/or efficacy will be made independently by the treating clinician and/or the patient and is not dictated by the study. Participants can be enrolled during tapering/discontinuing process from prior antipsychotic treatment(s). Individuals who are not currently receiving treatment for schizophrenia are not eligible for the study. Any antipsychotic treatments must be recorded as concomitant medications.

Concomitant psychiatric medications (eg, antidepressants, mood stabilizers, anxiolytics) are permitted and are recommended to remain at a stable dose during the study period.