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

Pfizer logo

Pfizer

Status and phase

Completed
Phase 3

Conditions

Bronchitis, Chronic

Treatments

Drug: azithromycin SR (Zithromax; compound: CP-62,993)
Other: placebo
Drug: levofloxacin

Study type

Interventional

Funder types

Industry

Identifiers

NCT00644449
A0661102

Details and patient eligibility

About

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

Enrollment

551 patients

Sex

All

Ages

35+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Adult patients with a history of chronic bronchitis (i.e., chronic cough and sputum production on most days for 3 consecutive months for more than 2 years) and current evidence of an acute bacterial exacerbation of their disease, as demonstrated by production of purulent sputum and the presence of at lest 2 of the following signs and symptoms, were included: increased sputum production, increased dypsnea, increased cough, or increased sputum purulence.

Exclusion criteria

Key exclusion criteria were treatment with any systemic antibiotic within the previous 7 days, or the likelihood of receiving other systemic antibiotics during participation in the study; a chest radiograph consistent with pneumonia; and previously diagnosed conditions which tend to mimic or complicate the course and evaluation of the infectious process (e.g., bronchiectasis, lung abscess or empyema, active TB, pulmonary malignancy, cystic fibrosis).

Trial design

Primary purpose

Treatment

Allocation

Randomized

Interventional model

Parallel Assignment

Masking

Double Blind

551 participants in 2 patient groups

1
Experimental group
Treatment:
Other: placebo
Drug: azithromycin SR (Zithromax; compound: CP-62,993)
Other: placebo
2
Experimental group
Treatment:
Other: placebo
Other: placebo
Drug: levofloxacin

Trial contacts and locations

75

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Data sourced from clinicaltrials.gov

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