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Study identifier: NCT02639702 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

Switching From Twice-Daily to Once-Daily Clozapine Dosing in Schizophrenia

Condition: Schizophrenia · Schizoaffective Disorder  ·  Sponsor: Centre for Addiction and Mental Health

PhasePhase 4
Planned participants30
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

Plasma half-life has routinely been used to establish the dosing schedule of antipsychotics; for example, it is recommended that agents with a short plasma half-life be administered multiple times per day. However, to date, several randomized controlled trials (RCTs) have shown no differences in clinical outcomes between once- and twice-daily dosing of various antipsychotics, suggesting that once-daily dosing of antipsychotics is a viable option regardless of plasma half-life. This would apply to clozapine as well; however, there have been no studies comparing once-daily vs. twice-daily dosing regimens of clozapine in terms of efficacy and tolerability. To address this gap in the literature, the investigators shall conduct a pilot, double-blind, RCT to examine efficacy and tolerability following a switch to once-daily dosing regimen of clozapine in patients with schizophrenia receiving clozapine twice a day.

This description comes directly from the study's public registry record.

Talk to the study team

Gary Remington, MD, PhD  ·  +1-416-535-8501  ·  Gary.Remington@camh.ca

Carol Borlido, BSc  ·  416 535-8501  ·  carol.borlido@camh.ca

Always discuss trial participation with your own doctor first.

Locations (1)

Centre for Addiction and Mental HealthToronto, Ontario, CanadaRecruiting

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Source record: clinicaltrials.gov/study/NCT02639702