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CompletedNCT00105469Updated Dec 16, 2013Results posted

Evaluation of Clinical and Microbial Efficacy and Safety of AzaSite Compared to Tobramycin for Bacterial Conjunctivitis (C-01-401-004)

A Phase 3 interventional study of AzaSite and Tobramycin in Bacterial Conjunctivitis, sponsored by Merck Sharp & Dohme LLC. Completed at 26 sites in United States. Open to participants aged 1 Year and older. Per ClinicalTrials.gov, last updated 2013-12-16.

Sponsored by Merck Sharp & Dohme LLC (part of Merck & Co., Inc) · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
743
Allocation
Randomized
Ages
1 Year and older
Sex
All
01

Study summary

The purpose of this study is to evaluate the clinical and microbial efficacy and safety of AzaSite compared to tobramycin for bacterial conjunctivitis. Adults and children one year of age and older with bacterial conjunctivitis in at least one eye are eligible. Subjects will be randomly assigned to the AzaSite group or Tobramycin group. Three visits will be required for the study.

02

Conditions studied

  • Bacterial Conjunctivitis

Keywords

  • Bacterial Conjunctivitis
  • Pink Eye
  • Conjunctivitis
  • Eye Infection
03

In context

Conjunctivitis, Bacterial

40 studies on the registry are indexed under Conjunctivitis, Bacterial; 2 are open to participants now.

This study's enrollment of 743 is above the median of 261 across 36 interventional studies indexed under Conjunctivitis, Bacterial.

Browse Conjunctivitis, Bacterial studies →

Lead sponsor

Merck Sharp & Dohme LLC is the lead sponsor of 2,166 studies on the registry; 132 are open to participants now.

Of its 501 completed or terminated interventional studies of FDA-regulated products, 370 (74%) have results posted.

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

04

Who can participate

Ages eligible
1 Year and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Male or female subject, of any race, who is at least 1 year of age.
  • Subjects must have a clinical diagnosis of acute bacterial conjunctivitis and exhibit mucopurulent or purulent conjunctival discharge (crusty or sticky eyelids, globular and yellow discharge) and redness in at least one eye.
  • The symptoms of bacterial conjunctivitis must be present for 3 days (approximately 72 hours) or less.
  • Must be willing to discontinue contact lens wear for the duration of the study.

Exclusion criteria

Exclusion Criteria:

  • Any uncontrolled systemic disease or debilitating disease.
  • Use of topical ophthalmic solutions including tear substitutes within 2 hours before and during the study.
  • Use of any topical ophthalmic anti-inflammatory agents within 48 hours before and during study.
  • Any active upper respiratory tract infection.
  • Pregnant or nursing females.
  • Use of any antibiotic (topical or systemic) within 72 hours of enrollment.
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Investigator, Outcomes assessor)
Enrollment
743 participants (actual)

Study arms

  • Experimental
    AzaSite

    1.0% azithromycin in DuraSite

    Drug: AzaSite

  • Active comparator
    Tobramycin

    0.3% tobramycin

    Drug: Tobramycin

Interventions

  • AzaSite ophthalmic solution; one topical drop to the infected eye or eyes twice daily (in the morning and at bedtime) on Days 1 and 2 followed by once daily (in the morning between 7 and 10am) on Days 3 through 5.

  • Tobramycin ophthalmic solution; one topical drop to the infected eye or eyes four times daily at 4 to 6 hour intervals (first dose in the morning between 7 and 10am) for 5 days.

06

What researchers measure

Primary outcomes

  1. Number of Participants Who Achieved Clinical Resolution at Visit 3

    Clinical resolution is defined as absence of all three clinical signs (ocular discharge, bulbar conjunctival injection, and palpebral conjunctival injection).

    Time frame: Visit 3 (Day 6)

Secondary outcomes

  1. Number of Participants Who Achieved Bacterial Eradication at Visit 3

    Bacterial eradication is defined as eradication of the causative pathogens as indicated by the absence of growth (0 colony forming units/mL) of the original infecting organism(s).

    Time frame: Visit 3 (Day 6)

07

Results

Posted Oct 27, 2011

Participant flow

Participant flow — Overall Study
MilestoneAzaSiteTobramycin
Started365378
Completed343367
Not completed2211
Withdrew: Adverse event98
Withdrew: Protocol violation40
Withdrew: Withdrawal by subject23
Withdrew: Lost to follow-up10
Withdrew: Lack of efficacy20
Withdrew: Other reason40

Outcome measures

PrimaryNumber of Participants Who Achieved Clinical Resolution at Visit 3

Clinical resolution is defined as absence of all three clinical signs (ocular discharge, bulbar conjunctival injection, and palpebral conjunctival injection).

Time frame:
Visit 3 (Day 6)
Reported as:
Number · Participants
Number of Participants Who Achieved Clinical Resolution at Visit 3
ParticipantsAzaSiteTobramycin
Number of Participants Who Achieved Clinical Resolution at Visit 3127123
SecondaryNumber of Participants Who Achieved Bacterial Eradication at Visit 3

Bacterial eradication is defined as eradication of the causative pathogens as indicated by the absence of growth (0 colony forming units/mL) of the original infecting organism(s).

Time frame:
Visit 3 (Day 6)
Reported as:
Number · Participants
Number of Participants Who Achieved Bacterial Eradication at Visit 3
ParticipantsAzaSiteTobramycin
Number of Participants Who Achieved Bacterial Eradication at Visit 3140148

Adverse events

Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
AzaSite—0/365 (0%)0/365 (0%)
Tobramycin—0/378 (0%)0/378 (0%)

Baseline characteristics

Age, Continuous
Age, Continuous(years)AzaSiteTobramycinTotal
Mean17.9 ± 20.2322.8 ± 22.6120.4 ± 21.55
Sex: Female, Male
Sex: Female, Male(Participants)AzaSiteTobramycinTotal
Female8190171
Male7867145
08

Study locations

26 sites
  • Renaissance Center
    Birmingham, Alabama 35205, United States
  • Children's Eye Physicians
    Littleton, Colorado 80122, United States
  • Palm Beach Eye Associates
    Atlantis, Florida 33462, United States
  • The Eye Associates
    Bradenton, Florida 34209, United States
  • Alan Shuster, MD
    Jupiter, Florida 33458, United States
  • Pasco Eye Institute
    New Port Richey, Florida 34652, United States
  • Tukoi Institute for Clinical Research
    North Miami Beach, Florida 33169, United States
  • Advanced Eye Care
    Panama City, Florida 32405, United States
  • Presidential Eye Center
    West Palm Beach, Florida 33401, United States
  • Jon Fishburn, MD
    Boise, Idaho 83706, United States
  • Medisphere Medical Research Center, LLC
    Evansville, Indiana 47714, United States
  • Hutchinson Clinic
    Hutchinson, Kansas 67502, United States
  • Massachusetts Eye and Ear Infirmary
    Boston, Massachusetts 02114, United States
  • Mason Eye Institute
    Columbia, Missouri 65212, United States
  • Ophthalmology Associates
    Creve Coeur, Missouri 63141, United States
  • Research Eye Care Center
    Kansas City, Missouri 64132, United States
  • Ophthalmology Associates
    Princeton, New Jersey 08540, United States
  • Huntington Medical Group
    Huntington Station, New York 11746, United States
  • Cornerstone Eye Care
    High Point, North Carolina 27262, United States
  • Eye Health Northwest
    Portland, Oregon 97209, United States
  • Irving Weinberger, MD
    Pittsburgh, Pennsylvania 15228, United States
  • Southern Eye Associates, PA
    Greenville, South Carolina 29605, United States
  • Corona Research Consultants, Inc.
    El Paso, Texas 79904, United States
  • Cottonwood Ophthalmology Associates
    Murray, Utah 84107, United States
  • Rockwood Clinic, PS-Eye Center
    Spokane, Washington 99205, United States
  • Wenatchee Valley Medical Center
    Wenatchee, Washington 98801, United States
09

References and documents

Publications

  • Protzko E, Bowman L, Abelson M, Shapiro A; AzaSite Clinical Study Group. Phase 3 safety comparisons for 1.0% azithromycin in polymeric mucoadhesive eye drops versus 0.3% tobramycin eye drops for bacterial conjunctivitis. Invest Ophthalmol Vis Sci. 2007 Aug;48(8):3425-9. doi: 10.1167/iovs.06-1413. PubMed 17652708 ↗

Related links

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 16, 2013, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT00105469
First posted
Mar 15, 2005
Start date
Jul 2004
Primary completion
Oct 2005
Completion
Oct 2005
Results posted
Oct 27, 2011
Last update
Dec 16, 2013

Oversight

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

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