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Clinical trialNCT00297947CompletedPhase 2/PHASE3Interventional

High Dose of Quetiapine in Treating Subjects With Treatment Refractory Schizophrenia or Schizoaffective Disorder

SponsorManhattan Psychiatric CenterEnrollment60Schizoaffective DisorderSchizophrenia
View the registry record on ClinicalTrials.gov

Summary

The lay summary the sponsor registered on ClinicalTrials.gov.

This study will investigate the safety and efficacy of quetiapine in sub-optimally responding patients with DSM-IV schizophrenia using a double blind, randomized 12-week trial comparing oral doses of 1200 mg/d to 600 mg/d of quetiapine.
clinicaltrials.gov ↗

Investigators

The overall officials registered on this study. Names that resolve to a findmyKOL profile link to it; the rest are shown as registered.

A profile link is shown only when the registered name resolves to a person record with a confident, namesake-checked match; ambiguous names stay unlinked.

Sites

2 registered facilities, with the per-site recruitment status where the registry publishes one. ClinicalTrials.gov does not publish per-site enrollment counts.

United States
  • Manhattan Psychiatric Center

    New York, New York, United States

  • Nathan Kline Institute for Psychiatric Research

    Orangeburg, New York, United States

Site investigator names are published by ClinicalTrials.gov only while a study recruits, so completed studies list sites without them.

Drugs studied

The drug and biological interventions registered on this study, normalized to their RxNorm ingredient where possible.

Quetiapine →
Linked drugs open the directory filtered to KOLs working with them.clinicaltrials.gov ↗

Registration & key dates

Registry attributes as recorded on the ClinicalTrials.gov study record.

Start
31 Dec 2004
Primary completion
31 Oct 2014
Completion
31 Oct 2014
Last update posted
17 Apr 2015
Registered enrollment
60
Registry id
NCT00297947
clinicaltrials.gov ↗

Source: ClinicalTrials.gov, via the CTTI AACT database, data as of 24 Aug 2026. Registry facts are shown as registered by the study sponsor; findmyKOL does not interpret them.