A Study of Doxycycline to Treat Chlamydial Infection
Public ClinicalTrials.gov record NCT05840159. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
A Phase 4 Study of a 3-Day vs. 7-Day Regimen of Doxycycline for the Treatment of Chlamydial Infection
Study identification
- NCT ID
- NCT05840159
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 4
- Lead sponsor
- National Institute of Allergy and Infectious Diseases (NIAID)
- NIH
- Enrollment
- 526 participants
Conditions and interventions
Conditions
Interventions
- Doxycycline Drug
- Placebo Other
Drug · Other
Eligibility (public fields only)
- Age range
- 16 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jan 18, 2024
- Primary completion
- Feb 11, 2026
- Completion
- Feb 11, 2026
- Last update posted
- Mar 26, 2026
2024 – 2026
United States locations
- U.S. sites
- 5
- U.S. states
- 4
- U.S. cities
- 4
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| University of Alabama at Birmingham School of Medicine - Infectious Disease | Birmingham | Alabama | 35222 | — |
| Grady Memorial Hospital | Atlanta | Georgia | 30303 | — |
| Emory University Hospital Midtown - Emory Clinic Infectious Diseases | Atlanta | Georgia | 30308 | — |
| University of Rochester Medical Center - Vaccine Research Unit | Rochester | New York | 14642-0001 | — |
| University of Washington - Harborview Medical Center - Center for AIDS and STD | Seattle | Washington | 98104-2433 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
Non-U.S. locations
This page focuses on the U.S. directory. The official record also lists 2 non-U.S. sites.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT05840159, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Mar 26, 2026 · Synced May 20, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT05840159 live on ClinicalTrials.gov.