# A Multicenter, Randomized, Double-Blind, Double-Dummy Comparative Trial of Azithromycin Sustained Release Versus 3-Day Azithromycin for the Treatment of Strep Throat in Adolescents and Adults

> **NCT00644293** · PHASE3 · COMPLETED · sponsor: **Pfizer** · enrollment: 598 (actual)

## Conditions studied

- Pharyngitis
- Tonsillitis

## Interventions

- **DRUG:** azithromycin (Zithromax)
- **DRUG:** placebo
- **DRUG:** azithromycin SR
- **DRUG:** placebo

## Key facts

- **NCT ID:** NCT00644293
- **Lead sponsor:** Pfizer
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2003-01
- **Primary completion:** —
- **Final completion:** 2004-04
- **Target enrollment:** 598 (ACTUAL)
- **Last updated:** 2011-06-08


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00644293

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00644293, "A Multicenter, Randomized, Double-Blind, Double-Dummy Comparative Trial of Azithromycin Sustained Release Versus 3-Day Azithromycin for the Treatment of Strep Throat in Adolescents and Adults". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT00644293. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*