NCT04580134 CLOZAPINE Response in Biotype-1
| NCT ID | NCT04580134 |
| Status | Recruiting |
| Phase | Phase 4 |
| Sponsor | University of Texas Southwestern Medical Center |
| Condition | Schizophrenia |
| Study Type | INTERVENTIONAL |
| Enrollment | 524 participants |
| Start Date | 2022-03-01 |
| Primary Completion | 2027-04-30 |
Eligibility & Interventions
Eligibility Fast-Check
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What to Expect as a Participant
You will actively receive the study intervention — which may be a drug, biologic, device, or procedure.
Phase 4 studies follow an already-approved treatment in real-world conditions to monitor long-term safety and effectiveness.
This trial targets 524 participants in total. It began in 2022-03-01 with a primary completion date of 2027-04-30.
⚠ This information is for research awareness only. Always consult your physician before joining any clinical trial. Participation is voluntary and you may withdraw at any time.
Brief Summary
The CLOZAPINE study is designed as a multisite study across 5 sites and is a clinical trial, involving human participants who are prospectively assigned to an intervention. The study will utilize a stringent randomized, double-blinded, parallel group clinical trial design. B2 group will serve as psychosis control with risperidone as medication control. The study is designed to evaluate effect of clozapine on the B1 participants, and the effect that will be evaluated is a biomedical outcome. The study sample will be comprised of individuals with psychosis, including 1) schizophrenia, 2) schizoaffective disorder and 3) psychotic bipolar I disorder. The investigators plan to initially screen and recruit n=524 (from both the existing B-SNIP library and newly-identified psychosis cases, \~50% each) in order to enroll n=320 (B1 and B2) into the RCT.
Eligibility Criteria
Inclusion Criteria: * 18-60y/o; males and females; all races and ethnicities; able to provide written informed consent; able to read, speak, and understand English; medically stable; meeting DSM-IV (SCID-based) criteria for schizophrenia, schizoaffective disorder, or bipolar I disorder with psychotic features (we will use DSM-IV to be consistent with prior B-SNIP samples); PANSS total score of ≥70 and at least one item scored ≥5 or two items scored ≥4 on PANSS Positive Subscale; normal baseline values for absolute neutrophil count (ANC above 1500/mm3) Exclusion Criteria: * premorbid intellectual ability estimate below 70 (WRAT-4, Word Reading subtest, age-corrected standardized score); comorbid DSM-IV diagnosis of alcohol or substance abuse in prior 1 month or substance dependence in prior 3 months; neurological (e.g., seizure disorder, stroke, traumatic brain injury with a loss of consciousness ≥ 30min) or severe medical condition (e.g., decompensated cardiovascular disorder, AIDS) that may affect central nervous system function; concomitant medications known to affect EEG properties (i.e., lithium, anticonvulsants, benzodiazepines) or strong CYP 1A2 inhibitors (e.g., ciprofloxacin, enoxacin) or strong CYP 3A4 inducers (e.g., phenytoin, carbamazepine, phenobarbital, rifampin) which cannot be safely discontinued; vulnerable populations (e.g., pregnant, nursing, incarcerated); unwilling to use reliable means of contraception; history of neuroleptic malignant syndrome; prior treatment with clozapine, prior treatment with long-acting injectable antipsychotics that are 1-month formulations within the past 3 months and for 3-month formulations within the past 6 months; intolerable side effects to either clozapine or risperidone in lifetime, or a previously failed trial of either clozapine or risperidone at adequate doses in lifetime; history of drug reaction with eosinophilia and systemic symptoms syndrome (DRESS), also known as drug-induced hypersensitivity syndrome (DIHS); high risk for suicide defined as more than 1 attempt in past 12 months that required medical attention, any attempt in the past 3 months or current suicidal ideation with plan and intent such that outpatient care is precluded; current homicidal ideation with plan and intent such that outpatient care is precluded.
Contact & Investigator
Carol Tamminga, M.D.
PRINCIPAL INVESTIGATOR
University of Texas Southwestern Medical Center
Frequently Asked Questions
Who can join the NCT04580134 clinical trial?
This trial is open to participants of all sexes, aged 18 Years or older, up to 60 Years, studying Schizophrenia. Full inclusion and exclusion criteria are listed in the Eligibility Criteria section. Always confirm your eligibility with the research team before applying.
What phase is the NCT04580134 trial and what does that mean for participants?
Phase 4 studies are conducted after a treatment has been approved. They monitor long-term safety and real-world effectiveness in a broader patient population.
Is NCT04580134 currently recruiting?
Yes, NCT04580134 is actively recruiting participants. Contact the research team at asha.philip@utsouthwestern.edu for enrollment information.
Where is the NCT04580134 trial being conducted?
This trial is being conducted at Hartford, United States, Athens, United States, Chicago, United States, Boston, United States and 1 additional location.
Who is sponsoring the NCT04580134 clinical trial?
NCT04580134 is sponsored by University of Texas Southwestern Medical Center. The principal investigator is Carol Tamminga, M.D. at University of Texas Southwestern Medical Center. The trial plans to enroll 524 participants.
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