Immediate Release (IR) to Sustained Release (SR) Switching Study: Study of Switching From IR Seroquel to SR Seroquel in Outpatients With Schizophrenia
Public ClinicalTrials.gov record NCT00206128. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
6-week Multicenter, Double-blind, Randomized, Parallel-group, Phase 3 Study to Evaluate the Feasibility of Switching From Immediate-release Quetiapine Fumarate (SEROQUEL) to Sustained-release Quetiapine Fumarate in Outpatients With Schizophrenia (Abbreviated)
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The purpose of this study is to determine that the efficacy of the sustained release (SR) formulation of quetiapine (Seroquel) is not inferior to the immediate release (IR) formulation. PLEASE NOTE: Seroquel SR and Seroquel XR refer to the same formulation. The SR designation was changed to XR after consultation with FDA.
Study identification
- NCT ID
- NCT00206128
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 3
- Enrollment
- 454 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 18 Years to 65 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Nov 2004 (Type not available)
- Primary completion
- Feb 2006 (Actual)
- Completion
- Feb 2006 (Actual)
- Last update posted
- Jan 4, 2013
2004 – 2006
United States locations
- U.S. sites
- 18
- U.S. states
- 11
- U.S. cities
- 18
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Research Site | Birmingham | Alabama | — | — |
| Research Site | Anaheim | California | — | — |
| Research Site | Cerritos | California | — | — |
| Research Site | Garden Grove | California | — | — |
| Research Site | National City | California | — | — |
| Research Site | Pasadena | California | — | — |
| Research Site | San Diego | California | — | — |
| Research Site | Santa Ana | California | — | — |
| Research Site | North Miami | Florida | — | — |
| Research Site | Atlanta | Georgia | — | — |
| Research Site | Hoffman Estates | Illinois | — | — |
| Research Site | New Orleans | Louisiana | — | — |
| Research Site | Jackson | Mississippi | — | — |
| Research Site | Clementon | New Jersey | — | — |
| Research Site | Staten Island | New York | — | — |
| Research Site | Austin | Texas | — | — |
| Research Site | Houston | Texas | — | — |
| Research Site | Richmond | Virginia | — | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
Non-U.S. locations
This page focuses on the U.S. directory. The official record also lists 51 non-U.S. sites.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00206128, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jan 4, 2013 · Synced Oct 23, 2026
Related: full search, browse by condition, browse by drug or therapy, browse by sponsor, browse by U.S. city.
Open the official record
The complete public registry record, listed eligibility criteria, and available contact information for NCT00206128 live on ClinicalTrials.gov.