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NCT00644449 · ClinicalTrials.gov registry record · Phase 3
A Multicenter, Randomized, Double-Blind, Double-Dummy Trial of Azithromycin SR Compared With Levofloxacin for the Treatment of Acute Symptoms of Chronic Bronchitis
A Phase 3 study, sponsored by Pfizer.
- Completed
- Registry status
- Phase 3
- Development phase
- 551
- Enrollment target
NCT00644449: Completed Phase 3 study, sponsored by Pfizer.
NCT00644449 is a Phase 3 study that has completed, run by Pfizer. The registered enrollment target is 551 participants, below the 772-participant average among 15,282 other Phase 3 trials with a reported enrollment target (29% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT00644449, a Phase 3 study, has completed, sponsored by Pfizer.
- COMPLETED
- Registry status
- Phase 3
- Development phase
- 551 participants
- Enrollment target
Study Summary
This study was performed to confirm that a single 2.0-g dose of azithromycin SR is at least as effective as 7 days of levofloxacin 500 mg/day in adults with acute exacerbation of chronic bronchitis Secondary objectives: To assess safety and the bacteriologic efficacy of both treatment regimens
Interventions
- OTHER placebo
- DRUG levofloxacin
- DRUG azithromycin SR (Zithromax; compound: CP-62,993)
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 551 participants |
| Start Date | 2003-01 |
| Est. Completion | 2004-03 |
| Phase | Phase 3 |
What the finished NCT00644449 record still lists
NCT00644449 is an interventional study that assigns participants to a tested intervention. The registered 551 participants enrollment target is mid-sized for trials with a published cap, below the 772-participant average among 15,282 other Phase 3 trials with a reported enrollment target (29% lower).
The record links to 0 conditions, and to 3 interventions - of which placebo is the first listed.
NCT00644449 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT00644449 about?
NCT00644449 is a clinical study titled "A Multicenter, Randomized, Double-Blind, Double-Dummy Trial of Azithromycin SR Compared With Levofloxacin for the Treatment of Acute Symptoms of Chronic Bronchitis". This study was performed to confirm that a single 2.0-g dose of azithromycin SR is at least as effective as 7 days of levofloxacin 500 mg/day in adults with acute exacerbation of chronic bronchitis Secondary objectives: To assess safety and the bacteriologic efficacy of both treatment regimens
What is the current status of trial NCT00644449?
This trial is currently completed. It is a Phase 3 study. The enrollment target is 551 participants. The study started on 2003-01. Estimated completion is 2004-03.
What interventions are being tested in trial NCT00644449?
The interventions under investigation include: placebo (OTHER), levofloxacin (DRUG), azithromycin SR (Zithromax; compound: CP-62,993) (DRUG).
Who is sponsoring clinical trial NCT00644449?
This trial is sponsored by Pfizer, which has 1,845 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT00644449's enrollment target sits among peer trials
551 680th of 2000 higher than 1,321 of 2,000 other Phase 3 trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Phase 3 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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