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Study identifier: NCT04478838 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

"Extended" (Alternate Day) Antipsychotic Dosing

Condition: Schizophrenia and Related Disorders · Drug Administration Schedule · Drug Therapy  ·  Sponsor: Centre for Addiction and Mental Health

PhasePhase 4
Planned participants120
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

The study wishes to examine whether "extended" antipsychotic treatment, in this case, antipsychotic treatment every other day, is as effective as daily treatment. It is also evaluating whether there may be differences in terms of side effects. Participants will be randomly assigned to either the treatment as usual group (i.e., taking antipsychotic daily) or the extended dosing group (i.e., taking antipsychotic one day on, one day off). That means, like flipping a coin, there is a 50/50 chance that participants will continue on daily dosing of your antipsychotic or have it switched to every other day dosing. This study will last for 1 year. Participants will be evaluated at the beginning and every two weeks during the first 6 months, with visits once every 4 weeks for the final 6 months. In total, participants will make 22 visits over 52 weeks to the investigator's office. The investigators hypothesize that with ED, there will be no change in symptom severity but improvement in the frequency and severity of side effects, wellbeing, and functioning.

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

Talk to the study team

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

Gary Remington, MD, PhD  ·  416-535-8501  ·  gary.remington@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/NCT04478838