ClinicalTrials.gg
CompletedNCT00874887Updated Dec 19, 2011Results posted

A Clinical Study to Evaluate if Benzalkonium Chloride (BAK) in a Quinolone Eyedrop Reduces the Likelihood of Developing Resistant Organisms

A Phase 4 interventional study of moxifloxacin 0.5% HCI ophthalmic solution and gatifloxacin ophthalmic solution 0.3% in Anti-biotic Resistance, sponsored by Allergan. Completed at 2 sites in 2 countries. Open to participants aged 50 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2011-12-19.

Sponsored by Allergan (part of AbbVie) · Phase 4, Interventional, and Basic science

Phase
Phase 4
Study type
Interventional
Enrollment
66
Allocation
Randomized
Ages
50 Years and older
Sex
All
01

Study summary

The purpose of this study is to assess if the presence of BAK in a fluoroquinolone in the study eye affects the development of resistant bacteria on the conjunctiva based upon changes in the surface flora over the course of 2 weeks of topical treatment in healthy adult subjects.

02

Conditions studied

  • Anti-biotic Resistance
03

In context

Lead sponsor

Allergan is the lead sponsor of 505 studies on the registry; none are open to participants now.

Of its 93 completed or terminated interventional studies of FDA-regulated products, 91 (98%) have results posted.

First submitted before Allergan became part of AbbVie.

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

04

Who can participate

Ages eligible
50 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

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
  • At least 50 years of age
  • In good general health

Exclusion criteria

Exclusion Criteria:

  • Any ocular surgery or use of topical antibiotics or antiseptics in either eye within the last 3 months
  • Use of topical steroids, or non-steroidal anti inflammatory drugs in either eye within 30 days of Baseline (or anticipated during the study)
  • Use of lid scrubs within 7 days of Baseline in either eye (or anticipated use during the study)
05

Study design

Phase
Phase 4
Primary purpose
Basic science
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Investigator)
Enrollment
66 participants (actual)

Study arms

  • Active comparator
    Vigamox®

    moxifloxacin 0.5% (m mg/mL), boric acid, sodium chloride, and purified water

    Drug: moxifloxacin 0.5% HCI ophthalmic solution

  • Active comparator
    Zymar®

    gatifloxacin 0.3% (3 mg/mL), benzalkonium chloride 0.005%, edetate disodium; purified water and sodium chloride

    Drug: gatifloxacin ophthalmic solution 0.3%

Interventions

06

What researchers measure

Primary outcomes

  1. Percentage of Subjects With Strain Resistance of the Conjunctiva as Determined by Minimum Inhibitory Concentration (MIC) at Day 14

    Percentage of subjects with strain resistance as determined by Minimum Inhibitory Concentration (MIC) of the conjunctiva (clear membrane covering the white surface of the eye) at day 14. MIC is the lowest concentration of an antimicrobial that inhibits the visible growth of a microorganism after incubation. The MIC cut-off values include: Intermediate is 1 to less than 2; Resistant is greater than or equal to 2.

    Time frame: Day 14

Secondary outcomes

  1. Mutant Prevention Concentration (MPC) of the Conjunctiva at Day 14

    Mutant Prevention Concentration (MPC) of the conjunctiva (clear membrane covering the white surface of the eye) at day 14. MPC is the lowest drug concentration which prevents growth of any colony of bacteria on the conjunctiva. The MPC outcome measure was not analyzed due to the low number of data points.

    Time frame: Day 14

  2. Minimum Inhibitory Concentration 50 (MIC50) at Day 14

    The Minimum Inhibitory Concentration 50 (MIC50) is the minimum concentration required to inhibit the growth of 50% of microorganisms. The MIC50 outcome measure was not analyzed due to the low number of data points.

    Time frame: Day 14

  3. Minimum Inhibitory Concentration 90 (MIC90) at Day 14

    The Minimum Inhibitory Concentration 90 (MIC90) is the minimum concentration required to inhibit the growth of 90% of microorganisms. The MIC90 outcome measure was not analyzed due to the low number of data points.

    Time frame: Day 14

  4. Minimum Inhibitory Concentration (MIC) Range at Day 14

    MIC range at day 14. MIC is the lowest concentration of an antimicrobial that inhibits the visible growth of a microorganism after incubation. The MIC cut-off values include: Intermediate is 1 to less than 2; Resistant is greater than or equal to 2. The MIC outcome measure was not analyzed due to the low number of data points.

    Time frame: Day 14

07

Results

Posted Dec 19, 2011
Limitations and caveats
Only a small number of resistant species were obtained at the study endpoints. Therefore, some outcome measures were not able to be analyzed.

Participant flow

Participant flow — Overall Study
MilestoneVigamox®Zymar®
Started3234
Completed3234
Not completed00

Outcome measures

PrimaryPercentage of Subjects With Strain Resistance of the Conjunctiva as Determined by Minimum Inhibitory Concentration (MIC) at Day 14

Percentage of subjects with strain resistance as determined by Minimum Inhibitory Concentration (MIC) of the conjunctiva (clear membrane covering the white surface of the eye) at day 14. MIC is the lowest concentration of an antimicrobial that inhibits the visible growth of a microorganism after incubation. The MIC cut-off values include: Intermediate is 1 to less than 2; Resistant is greater than or equal to 2.

Time frame:
Day 14
Reported as:
Number · Percentage of Subjects
Percentage of Subjects With Strain Resistance of the Conjunctiva as Determined by Minimum Inhibitory Concentration (MIC) at Day 14
Percentage of SubjectsVigamox®Zymar®
Percentage of Subjects With Strain Resistance of the Conjunctiva as Determined by Minimum Inhibitory Concentration (MIC) at Day 149.40
SecondaryMutant Prevention Concentration (MPC) of the Conjunctiva at Day 14

Mutant Prevention Concentration (MPC) of the conjunctiva (clear membrane covering the white surface of the eye) at day 14. MPC is the lowest drug concentration which prevents growth of any colony of bacteria on the conjunctiva. The MPC outcome measure was not analyzed due to the low number of data points.

Time frame:
Day 14
Reported as:
Number · micrograms per milliliter (ug/mL)

No measurements were reported for this outcome.

SecondaryMinimum Inhibitory Concentration 50 (MIC50) at Day 14

The Minimum Inhibitory Concentration 50 (MIC50) is the minimum concentration required to inhibit the growth of 50% of microorganisms. The MIC50 outcome measure was not analyzed due to the low number of data points.

Time frame:
Day 14
Reported as:
Number · micrograms per milliliter (ug/mL)

No measurements were reported for this outcome.

SecondaryMinimum Inhibitory Concentration 90 (MIC90) at Day 14

The Minimum Inhibitory Concentration 90 (MIC90) is the minimum concentration required to inhibit the growth of 90% of microorganisms. The MIC90 outcome measure was not analyzed due to the low number of data points.

Time frame:
Day 14
Reported as:
Number · micrograms per milliliter (ug/mL)

No measurements were reported for this outcome.

SecondaryMinimum Inhibitory Concentration (MIC) Range at Day 14

MIC range at day 14. MIC is the lowest concentration of an antimicrobial that inhibits the visible growth of a microorganism after incubation. The MIC cut-off values include: Intermediate is 1 to less than 2; Resistant is greater than or equal to 2. The MIC outcome measure was not analyzed due to the low number of data points.

Time frame:
Day 14
Reported as:
Number · micrograms per milliliter (ug/mL)

No measurements were reported for this outcome.

Adverse events

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

Adverse event summary by group
GroupDeathsSeriousOther
Vigamox®—0/32 (0%)0/32 (0%)
Zymar®—0/34 (0%)0/34 (0%)

Baseline characteristics

Age Continuous
Age Continuous(years)Vigamox®Zymar®Total
Mean60.3750 ± 7.827862.5000 ± 8.389261.625 ± 8.1085
Sex: Female, Male
Sex: Female, Male(Participants)Vigamox®Zymar®Total
Female182139
Male141327
08

Study locations

2 sites
  • Minneapolis, Minnesota, United States
  • Saskatoon, Saskatchewan, Canada
09

Timeline

Tracking since Sep 25, 2026
Not marked actual or estimatedDates not marked actual or estimated

The record gives a start of Mar 2009, a primary completion of Sep 2009 and a completion of Oct 2009. It does not say whether these dates are actual or estimated.

Results were first posted in Dec 2011, 2 years 3 months after primary completion.

How these figures are worked out, and which studies are left out of them.

Registered
Apr 1, 2009
First posted
Apr 3, 2009
Start
Mar 2009
Primary completionActual
Sep 2009
CompletionActual
Oct 2009
Results first posted
Dec 19, 2011
Last update
Dec 19, 2011
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Dec 19, 2011, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT00874887
Lead sponsor
Allergan
Responsible party
Sponsor
First posted
Apr 3, 2009
Start date
Mar 2009
Primary completion
Sep 2009
Completion
Oct 2009
Results posted
Dec 19, 2011
Last update
Dec 19, 2011

Study contacts

Medical Director
study director · Allergan
View the source record on ClinicalTrials.gov ↗

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Studies of the drugs tested here: Moxifloxacin · Gatifloxacin

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