deltatrials
Recruiting PHASE4 INTERVENTIONAL 2-arm NCT04478838

Extended (Alternate Day) Antipsychotic Dosing

Re-examining Maintenance Antipsychotic Treatment in Schizophrenia: Extended Antipsychotic Dosing

Sponsor: Centre for Addiction and Mental Health

Conditions Antipsychotic Agents Drug Administration Schedule Drug Therapy Schizophrenia and Related Disorders
Interventions Olanzapine Risperidone paliperidone
Updated 13 times since 2020 Last updated: Apr 30, 2025 Started: Jun 6, 2022 Primary completion: Sep 30, 2027 Completion: Sep 30, 2028
This information is for research purposes only and is not medical advice. Consult a healthcare provider before making any medical decision.

This PHASE4 trial investigates Antipsychotic Agents and Drug Administration Schedule and is currently actively recruiting participants. Centre for Addiction and Mental Health leads this study, which shows 13 recorded versions since 2022 — indicating substantial longitudinal coverage. This study adds to the longitudinal dataset for psychiatric treatment development.

Status Flow

~Aug 2020 – ~Sep 2020 · 31 days · monthly snapshot~Sep 2020 – ~Jan 2021 · 4 months · monthly snapshot~Jan 2021 – ~Feb 2021 · 31 days · monthly snapshot~Feb 2021 – ~Sep 2021 · 7 months · monthly snapshot~Sep 2021 – ~Apr 2022 · 7 months · monthly snapshot~Apr 2022 – ~Sep 2022 · 5 months · monthly snapshot~Sep 2022 – ~Feb 2023 · 5 months · monthly snapshot~Feb 2023 – ~Oct 2023 · 8 months · monthly snapshot~Oct 2023 – ~Jul 2024 · 9 months · monthly snapshot~Jul 2024 – ~Aug 2024 · 31 days · monthly snapshot~Aug 2024 – ~Sep 2024 · 31 days · monthly snapshot~Sep 2024 – ~Jun 2025 · 9 months · monthly snapshot~Jun 2025 – present · 14 months · monthly snapshot

Change History

13 versions recorded

  1. Jun 2025 — Present [monthly]

    Recruiting PHASE4

  2. Sep 2024 — Jun 2025 [monthly]

    Recruiting PHASE4

  3. Aug 2024 — Sep 2024 [monthly]

    Recruiting PHASE4

  4. Jul 2024 — Aug 2024 [monthly]

    Recruiting PHASE4

  5. Oct 2023 — Jul 2024 [monthly]

    Recruiting PHASE4

▶ Show 8 earlier versions

  1. Feb 2023 — Oct 2023 [monthly]

    Recruiting PHASE4

  2. Sep 2022 — Feb 2023 [monthly]

    Recruiting PHASE4

    Status: Not Yet Recruiting → Recruiting

  3. Apr 2022 — Sep 2022 [monthly]

    Not Yet Recruiting PHASE4

  4. Sep 2021 — Apr 2022 [monthly]

    Not Yet Recruiting PHASE4

  5. Feb 2021 — Sep 2021 [monthly]

    Not Yet Recruiting PHASE4

  6. Jan 2021 — Feb 2021 [monthly]

    Not Yet Recruiting PHASE4

  7. Sep 2020 — Jan 2021 [monthly]

    Not Yet Recruiting PHASE4

  8. Aug 2020 — Sep 2020 [monthly]

    Not Yet Recruiting PHASE4

    First recorded

Eligibility Summary

No eligibility information available.

Contact Information

Sponsor contact:
  • Centre for Addiction and Mental Health
Data source: Centre for Addiction and Mental Health

For direct contact, visit the study record on ClinicalTrials.gov .

Study Locations