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A Clinical Trial to Determine the Effects of 40 Mg Doxycycline Versus a Placebo Control for the Treatment of Rosacea

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00126399
Enrollment
528
Registered
2005-08-04
Start date
2004-06-30
Completion date
2005-04-30
Last updated
2005-08-19

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

Conditions

Rosacea

Keywords

rosacea, acne rosacea

Brief summary

The objective of this study is to evaluate the safety and efficacy of 40 mg doxycycline controlled-release capsules administered once daily for the treatment of rosacea compared with a placebo.

Interventions

DRUGdoxycycline

Sponsors

CollaGenex Pharmaceuticals
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

Main Inclusion Criteria: * Healthy patients with rosacea * Males and females ≥18 years of age * 10 to 40 papules and pustules and ≤2 nodules * Score of 2 to 4 on the IGA * Presence of telangiectasia * Moderate to severe erythema Main

Exclusion criteria

* Use of topical acne treatments or topical or systemic antibiotics * Use of systemic retinoids within 90 days of baseline * Use of an investigational drug within 90 days of baseline * Pregnant or nursing women * Women of childbearing potential not using an adequate form of contraception * Change in method of contraception within 4 months of baseline * Known hypersensitivity to tetracyclines * Surgeries that bypass or exclude the duodenum or achlorhydria

Design outcomes

Primary

MeasureTime frame
Change in total inflammatory lesion count

Secondary

MeasureTime frame
Change from baseline in erythema scale scores
change from baseline in the investigator's global assessment (IGA) score
proportion of patients being clear or near-clear at endpoint

Outcome results

None listed

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