Skip to content

Is clozapine monotherapy is better than combination therapy in schizophrenia?

Clozapine monotherapy versus combination of Clozapine and Risperidone in patients with Treatment-resistant Schizophrenia: a randomized, active-controlled, open-label, non-inferiority study - CRISPS

Status
Active, not recruiting
Phases
Phase 4
Study type
Interventional
Source
CTRI
Registry ID
CTRI/2022/03/040928
Enrollment
244
Registered
2022-03-09
Start date
Unknown
Completion date
Unknown
Last updated
2024-12-09

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Health Condition 1: F202- Catatonic schizophrenia Health Condition 2: F201- Disorganized schizophrenia Health Condition 3: F200- Paranoid schizophrenia Health Condition 4: F203- Undifferentiated schizophrenia

Interventions

Intervention1: CLOZAPINE: Clozapine dose will be titrated as per the standard guidelines. The standard titration starts with clozapine 25 mg daily given in 2 divided doses, and then clozapine is incre

Sponsors

Seema Parija
Lead Sponsor

Eligibility

Inclusion criteria

Inclusion criteria: 1. Patients must have clinically confirmed TRS as per the psychiatrist at the baseline. 2. Patients must have an adequate hepatic function as defined by the following: (a) Total bilirubin = 1.5 X upper limit of normal (ULN). (b) Transaminases [(AST/SGOT) and (ALT/SGPT)] = 3 X ULN. 3. Patients must have adequate baseline hematologic parameters as defined by: (a) Absolute neutrophil count = 1.5 x 103/µL. (b) Platelet count = 100 x 103/µL. (c) Hemoglobin = 9 g/dL. (d) In patients transfused before study entry, transfusion must be = 14 days prior to the start of therapy to establish adequate hematologic parameters independent from transfusion support. 4. Patients must have creatinine clearance = 50 mL/min (as per MDRD formula) at the baseline visit. 5. Patient must provide signed informed consent prior to initiation of any study-related tests or procedures that are not part of standard-of-care for the patient’s disease. 6. Patients must agree to randomization as documented by signing the Institutional Ethics Committee (IEC) approved consent form. 7. Patients must be willing and able to comply with study procedures.

Exclusion criteria

Exclusion criteria: 1. Patients who have previously been diagnosed with one or more of the following: uncontrolled hypertension, congestive heart failure, myocardial infarction, uncontrolled diabetes, cerebrovascular accident, poorly controlled epilepsy, severe asthma, HIV, hepatitis B or C, or any malignancy. 2. Patients who have a history of allergy to the study drugs. 3. Patients who have participated in any other clinical interventional studies within the last 6 months. 4. Patients who are pregnant women or lactating mothers.

Design outcomes

Primary

MeasureTime frame
1. To determine the Positive And Negative Syndrome Scale (PANSS) score of the study groups at baseline and 6 months. 2. To assess non-inferiority of clozapine monotherapy to combination of clozapine and risperidone at 6 months.Timepoint: baseline, 6 months

Secondary

MeasureTime frame
To determine the Positive And Negative Syndrome Scale (PANSS) score of the study groups at baseline, 1 month, and 3 months.Timepoint: baseline, 1 month, and 3 months;To determine the Social and Occupational Functioning Assessment Scale (SOFAS) score of the study groups at baseline, 1 month, 3months, and 6 months.Timepoint: baseline, 1 month, 3months, and 6 months;To assess the Glasgow Antipsychotic side effects scale for clozapine (GASS-C)13 of the study groups at 1 month, 3months, and 6 months.Timepoint: 1 month, 3months, and 6 months;To assess the treatment-emergent adverse events of the study groups at 1 month, 3months, and 6 months.Timepoint: 1 month, 3months, and 6 months

Countries

India

Contacts

Public ContactJyoti Prakash Sahoo

SCB Medical College, Cuttack

drjp1111@gmail.com7787048634

Outcome results

None listed

Source: CTRI (via WHO ICTRP) · Data processed: Feb 4, 2026