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CompletedNCT00907101Updated Aug 1, 2022Results posted

Evaluate Effectiveness of Epiduo® Gel in Reducing Antibiotic Sensitive & Resistant Strains of Propionibacterium (P)Acnes

A Phase 4 interventional study of Adapalene 0.1%/Benzoyl Peroxide 2.5% Gel (Epiduo® Gel) in P Acnes Colonization, sponsored by Galderma R&D. Completed at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2022-08-01.

Sponsored by Galderma R&D · Phase 4, Interventional, and Other

Phase
Phase 4
Study type
Interventional
Enrollment
30
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

The purpose of this study is to evaluate the effectiveness of Epiduo® Gel in reducing antibiotic sensitive and resistant strains of P acnes in vivo.

02

Conditions studied

  • P Acnes Colonization
03

In context

Acne Vulgaris

730 studies on the registry are indexed under Acne Vulgaris; 86 are open to participants now.

This study's enrollment of 30 is below the median of 69 across 628 interventional studies indexed under Acne Vulgaris.

Browse Acne Vulgaris studies →

Lead sponsor

Galderma R&D is the lead sponsor of 280 studies on the registry; 9 are open to participants now.

Of its 59 completed or terminated interventional studies of FDA-regulated products, 55 (93%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Healthy adult male or female subjects 18 years of age and older, with no past or present history of any significant internal disease
  • Subjects who:

    • show a high degree of fluorescence of the facial skin under a Wood's lamp, indicating the presence of P acnes
    • have Baseline P acnes count of > 10,000 per cm2 CFU of the facial skin (forehead)
    • have high level resistance to erythromycin, variable resistance to clindamycin, resistance to tetracycline and variable resistance to doxycycline and minocycline

Exclusion criteria

Exclusion Criteria:

  • Subjects who exhibit any skin disorders of an acute or chronic nature (e.g., psoriasis, eczema, etc)
  • Subjects who have taken topical or systemic antibiotics within 4 weeks prior to baseline assessments
  • Subjects who have used other medications which may influence skin surface P acnes levels
  • Subjects who are unwilling to refrain from using toners, astringents or other drying agents on the face during the study
05

Study design

Phase
Phase 4
Primary purpose
Other
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
30 participants (actual)

Study arms

  • Experimental
    Study Treatment

    Adapalene 0.1%/Benzoyl Peroxide 2.5% Gel (Epiduo® Gel) Other Names: Epiduo® Gel Apply once daily

    Drug: Adapalene 0.1%/Benzoyl Peroxide 2.5% Gel (Epiduo® Gel)

Interventions

  • DrugAdapalene 0.1%/Benzoyl Peroxide 2.5% Gel (Epiduo® Gel)

    Apply once daily

    Also known as: Epiduo® Gel

06

What researchers measure

Primary outcomes

  1. Change From Baseline in Quantitative Bacteriology Measurements at Week 4

    Mean log10 values of P. acnes from swabbed skin samples Please note: Quantitative bacteriologic cultures were obtained from the facial skin (forehead) at screening, baseline, week 2 and week 4/early termination. Samples were obtained according to a modification of the technique of Williamson and Kligman. CFUs of P. acnes were counted at the dilution that contained between 10 and 100 CFUs. Total densities of P. acnes were calculated and reported as the average (of both plates) of the log10 CFUs per cm².

    Time frame: Week 4

Secondary outcomes

  1. Worst Post Baseline Tolerability Assessment - Erythema

    Please note: Tolerability assessments were recorded separately from adverse events. Tolerability changes which may have required a temporary or permanent interruption of the subject's participation in the study (at his/her request or at the investigator's discretion), or concomitant treatment, was to be recorded in the AE form of the CRF. An entry was to be made on the AE form for all AEs.

    Time frame: Week 4

  2. Worst Post Baseline Tolerability Assessment - Dryness

    Please note: Tolerability assessments were recorded separately from adverse events. Tolerability changes which may have required a temporary or permanent interruption of the subject's participation in the study (at his/her request or at the investigator's discretion), or concomitant treatment, was to be recorded in the AE form of the CRF. An entry was to be made on the AE form for all AEs.

    Time frame: Week 4

  3. Worst Post Baseline Tolerability Assessment - Scaling

    Please note: Tolerability assessments were recorded separately from adverse events. Tolerability changes which may have required a temporary or permanent interruption of the subject's participation in the study (at his/her request or at the investigator's discretion), or concomitant treatment, was to be recorded in the AE form of the CRF. An entry was to be made on the AE form for all AEs.

    Time frame: Week 4

  4. Worst Post Baseline Tolerability Assessment - Stinging/Burning

    Please note: Tolerability assessments were recorded separately from adverse events. Tolerability changes which may have required a temporary or permanent interruption of the subject's participation in the study (at his/her request or at the investigator's discretion), or concomitant treatment, was to be recorded in the AE form of the CRF. An entry was to be made on the AE form for all AEs.

    Time frame: Week 4

07

Results

Posted Mar 16, 2016

Participant flow

Participant flow — Overall Study
MilestoneEpiduo® Gel
Started30
Completed30
Not completed0

Outcome measures

PrimaryChange From Baseline in Quantitative Bacteriology Measurements at Week 4

Mean log10 values of P. acnes from swabbed skin samples Please note: Quantitative bacteriologic cultures were obtained from the facial skin (forehead) at screening, baseline, week 2 and week 4/early termination. Samples were obtained according to a modification of the technique of Williamson and Kligman. CFUs of P. acnes were counted at the dilution that contained between 10 and 100 CFUs. Total densities of P. acnes were calculated and reported as the average (of both plates) of the log10 CFUs per cm².

Time frame:
Week 4
Reported as:
Mean · log10 CFU/cm2
Change From Baseline in Quantitative Bacteriology Measurements at Week 4
log10 CFU/cm2Epiduo® Gel
Change From Baseline in Quantitative Bacteriology Measurements at Week 4-1.6 ± 0.78
SecondaryWorst Post Baseline Tolerability Assessment - Erythema

Please note: Tolerability assessments were recorded separately from adverse events. Tolerability changes which may have required a temporary or permanent interruption of the subject's participation in the study (at his/her request or at the investigator's discretion), or concomitant treatment, was to be recorded in the AE form of the CRF. An entry was to be made on the AE form for all AEs.

Time frame:
Week 4
Reported as:
Number · participants
Worst Post Baseline Tolerability Assessment - Erythema
participantsEpiduo® Gel
None30
Mild0
SecondaryWorst Post Baseline Tolerability Assessment - Dryness

Please note: Tolerability assessments were recorded separately from adverse events. Tolerability changes which may have required a temporary or permanent interruption of the subject's participation in the study (at his/her request or at the investigator's discretion), or concomitant treatment, was to be recorded in the AE form of the CRF. An entry was to be made on the AE form for all AEs.

Time frame:
Week 4
Reported as:
Number · participants
Worst Post Baseline Tolerability Assessment - Dryness
participantsEpiduo® Gel
None26
Mild4
SecondaryWorst Post Baseline Tolerability Assessment - Scaling

Please note: Tolerability assessments were recorded separately from adverse events. Tolerability changes which may have required a temporary or permanent interruption of the subject's participation in the study (at his/her request or at the investigator's discretion), or concomitant treatment, was to be recorded in the AE form of the CRF. An entry was to be made on the AE form for all AEs.

Time frame:
Week 4
Reported as:
Number · participants
Worst Post Baseline Tolerability Assessment - Scaling
participantsEpiduo® Gel
None29
Mild1
SecondaryWorst Post Baseline Tolerability Assessment - Stinging/Burning

Please note: Tolerability assessments were recorded separately from adverse events. Tolerability changes which may have required a temporary or permanent interruption of the subject's participation in the study (at his/her request or at the investigator's discretion), or concomitant treatment, was to be recorded in the AE form of the CRF. An entry was to be made on the AE form for all AEs.

Time frame:
Week 4
Reported as:
Number · participants
Worst Post Baseline Tolerability Assessment - Stinging/Burning
participantsEpiduo® Gel
None29
Mild1

Adverse events

Collected over Safety assessments were conducted for all subjects during each visit (baseline, week 2, week 4/early termination) after enrollment in the study. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Epiduo® Gel—0/30 (0%)0/30 (0%)

Baseline characteristics

Age, Continuous
Age, Continuous(years)Epiduo® Gel
Mean36.0 ± 12.51
Sex: Female, Male
Sex: Female, Male(Participants)Epiduo® Gel
Female8
Male22
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Epiduo® Gel
American Indian or Alaska Native0
Asian0
Native Hawaiian or Other Pacific Islander0
Black or African American1
White29
More than one race0
Unknown or Not Reported0
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)Epiduo® Gel
Hispanic or Latino1
Not Hispanic or Latino29
Unknown or Not Reported0
Skin Type
Skin Type(participants)Epiduo® Gel
Dry3
Normal11
Oily5
Combination11
Fitzpatrick Skin Type
Fitzpatrick Skin Type(participants)Epiduo® Gel
I0
II3
III12
IV12
V3
VI0
08

Study locations

1 site
  • Skin Study Center
    Broomall, Pennsylvania 19008, United States
09

References and documents

Publications

  • Leyden JJ, Preston N, Osborn C, Gottschalk RW. In-vivo Effectiveness of Adapalene 0.1%/Benzoyl Peroxide 2.5% Gel on Antibiotic-sensitive and Resistant Propionibacterium acnes. J Clin Aesthet Dermatol. 2011 May;4(5):22-6. PubMed 21607190 ↗
10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 1, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT00907101
Lead sponsor
Galderma R&D
Responsible party
Sponsor
First posted
May 22, 2009
Start date
Jun 2009
Primary completion
Jul 2009
Completion
Jul 2009
Results posted
Mar 16, 2016
Last update
Aug 1, 2022

Study contacts

Ronald W Gottschalk, MD
study director · Galderma R&D

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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