Completed PHASE3 INTERVENTIONAL 2-arm NCT00643149

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

Sponsor: Pfizer

Conditions Tonsillitis

Interventions amoxicillin azithromycin SR

Updated 7 times since 2017 Last updated: May 16, 2011 Started: May 31, 2003 Completion: Mar 31, 2004

This information is for research purposes only and is not medical advice. Consult a healthcare provider before making any medical decision.

This PHASE3 trial investigates Tonsillitis and is currently completed. Pfizer leads this study, which shows 7 recorded versions since 2003 — indicating limited longitudinal coverage. The change history captured here reflects the iterative nature of clinical trial conduct.

Status Flow

Change History

7 versions recorded

Sep 2025 — Present [monthly]

Completed PHASE3
Sep 2024 — Sep 2025 [monthly]

Completed PHASE3
Jul 2024 — Sep 2024 [monthly]

Completed PHASE3
Jan 2021 — Jul 2024 [monthly]

Completed PHASE3
Jun 2018 — Jan 2021 [monthly]

Completed PHASE3

▶ Show 2 earlier versions

Feb 2017 — Jun 2018 [monthly]

Completed PHASE3
Jan 2017 — Feb 2017 [monthly]

Completed PHASE3

First recorded

May 2003

Trial started

Per CT.gov start date — pre-dates our first snapshot

Eligibility Summary

No eligibility information available.

Contact Information

Sponsor contact:

Pfizer

Data source: Pfizer

For direct contact, visit the study record on ClinicalTrials.gov .

Study Locations

Bangalore, India , Bardstown, United States , Beachwood, United States , Bryan, United States , Calgary, Canada , Chesterland, United States , Cleveland, United States , Coquitlam, Canada , Endwell, United States , Escazú, Costa Rica and 25 more locations