# A Multicenter, Randomized, Double-Blind, Double-Dummy Trial of Azithromycin SR Compared With Levofloxacin for the Treatment of Acute Symptoms of Chronic Bronchitis

> **NCT00644449** · PHASE3 · COMPLETED · sponsor: **Pfizer** · enrollment: 551 (actual)

## Conditions studied

- Bronchitis, Chronic

## Interventions

- **OTHER:** placebo
- **DRUG:** azithromycin SR (Zithromax; compound: CP-62,993)
- **OTHER:** placebo
- **DRUG:** levofloxacin

## Key facts

- **NCT ID:** NCT00644449
- **Lead sponsor:** Pfizer
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2003-01
- **Primary completion:** —
- **Final completion:** 2004-03
- **Target enrollment:** 551 (ACTUAL)
- **Last updated:** 2011-05-16


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00644449

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00644449, "A Multicenter, Randomized, Double-Blind, Double-Dummy Trial of Azithromycin SR Compared With Levofloxacin for the Treatment of Acute Symptoms of Chronic Bronchitis". Retrieved via AI Analytics 2026-07-26 from https://api.ai-analytics.org/clinical/NCT00644449. Licensed CC0.

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