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A Multicenter, Randomized, Double-Blind, Double-Dummy Study Of Azithromycin SR Versus Amoxicillin For The Treatment Of Strep Throat In Children

A Multicenter, Randomized, Double-Blind, Double-Dummy Comparative Trial Of Azithromycin SR Versus Amoxicillin For The Treatment Of Group A Β-Hemolytic Streptococcal Pharyngitis/Tonsillitis In Children

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00643149
Enrollment
693
Registered
2008-03-26
Start date
2003-05-31
Completion date
2004-03-31
Last updated
2011-05-17

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Tonsillitis

Brief summary

The objective was to determine if a single 60 mg/kg dose of azithromycin SR was as safe and effective as a 10-day regimen of amoxicillin (45 mg/kg/day, given in divided doses every 12 hours) when used to treat children with strep throat.

Interventions

DRUGamoxicillin

10 day regimen, 45 mg/kg/day, given in divided doses every 12 hours

60 mg/kg dose of azithromycin SR was as safe and effective as a 10-day regimen of amoxicillin when used to treat children with strep throat

Sponsors

Pfizer
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
ALL
Age
2 Years to 12 Years
Healthy volunteers
No

Inclusion criteria

Patients who had evidence of acute pharyngitis/tonsillitis based on erythematous pharyngeal mucosa or thick exudate covering the pharynx and tonsillar area, and at least one of the following signs or symptoms were included: sore/scratchy throat; pain on swallowing; chills and/or fever cervical adenopathy; scarlet fever rash on the face and skin folds, or red tongue with prominent papillae (strawberry tongue). Subjects were required to have a positive rapid antigen detection test (RADT) or a positive culture of the pharynx or tonsils for GABHS.

Exclusion criteria

Patients were excluded if they had previously diagnosed disease(s) of immune function or treatment with any systemic antibiotic within the previous 7 days.

Design outcomes

Primary

MeasureTime frame
Bacteriologic response (eradication or persistence) at the Test of Cure (TOC) visit in the Bacteriologic Per Protocol populationTOC visit (Day 24-28)

Secondary

MeasureTime frame
Clinical response (clinical cure or failure) at the TOC visit in the Bacteriologic Per Protocol populationTOC Visit (Day 24-28)
Clinical response (cure or relapse) at the LTFU visitLTFU Visit (Day 38-45)
Pathogen susceptibility versus bacteriologic responseNot reported
Bacteriologic eradication rate at the Long-Term Follow-Up (LTFU) visitLTFU Visit (Day 38-45)
Vital signs and physical examinations were recordedBaseline and as necessary
Clinical laboratory testing (hematology and blood chemistry)As necessary
Azithromycin serum concentrations were determined for patients who vomited within 30 minutes of receiving their azithromycin SR/placebo doseDay 1
Adverse events (AEs) were assessed for all treated subjectsContinuous

Countries

Canada, Costa Rica, Guatemala, India, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026