ClinicalTrials.gg
CompletedNCT03489941Updated Jun 8, 2023Results posted

A Single-Center Evaluation of the Relative Efficacy of EM-100 Compared to Zaditor® (Ketotifen Fumarate Ophthalmic Solution 0.035%) and Vehicle

A Phase 3 interventional study of EM-100 and Zaditor® in Allergic Conjunctivitis, sponsored by Bausch & Lomb Incorporated. Completed at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2023-06-08.

Sponsored by Bausch & Lomb Incorporated (part of Bausch Health Companies Inc.) · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
65
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

A Single-Center study to demonstrate the non-inferiority of EM-100 to Zaditor® in the treatment of ocular itching.

02

Conditions studied

  • Allergic Conjunctivitis
03

In context

Conjunctivitis, Allergic

210 studies on the registry are indexed under Conjunctivitis, Allergic; 18 are open to participants now.

This study's enrollment of 65 is below the median of 87 across 174 interventional studies indexed under Conjunctivitis, Allergic.

Browse Conjunctivitis, Allergic studies →

Lead sponsor

Bausch & Lomb Incorporated is the lead sponsor of 223 studies on the registry; 5 are open to participants now.

Of its 51 completed or terminated interventional studies of FDA-regulated products, 41 (80%) have results posted.

First submitted after Bausch & Lomb Incorporated became part of Bausch Health Companies Inc..

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

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

  • be at least 18 years old
  • have a positive history of allergic conjunctivitis and positive skin test reaction to allergens
  • be willing to avoid disallowed medications for the appropriate and throughout the trial
  • be willing to avoid contact lens use
  • be willing to have a pregnancy test
  • must be able to read an eye chart from 10 feet away

Exclusion criteria

Exclusion Criteria:

  • must not have any allergies to the study medications
  • must not have any ocular or non ocular condition that investigator feels will interfere with study parameters
  • must not have used an drug or device in the past 30 days or currently be enrolled in another investigational trial
Terms in these criteria, in plain language(2)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Washout period

A planned gap after a treatment, so that its effects can lessen before the study treatment or a study assessment. Ask the study team and the doctor who prescribed it before changing any medicine.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
65 participants (actual)

Study arms

  • Experimental
    EM-100

    One drop of EM-100 in either the right or left eye once on Day 1.

    Drug: EM-100

  • Experimental
    Zaditor®

    One drop of Zaditor® in either the right or left eye once on Day 1.

    Drug: Zaditor®

  • Experimental
    Vehicle

    One drop of Vehicle in either the right or left eye once on Day 1.

    Drug: Vehicle

Interventions

  • DrugEM-100

    Subjects will receive one drop in one eye only based on the randomization list, one time over the course of the trial.

  • DrugZaditor®

    Subjects will receive one drop in one eye only based on the randomization list, one time over the course of the trial.

  • DrugVehicle

    Subjects will receive one drop in one eye only based on the randomization list, one time over the course of the trial.

06

What researchers measure

Primary outcomes

  1. Ocular Itching

    Ocular itching scores were self-assessed by the participant using a 5-point scale with 0.5 unit increments, wherein 0 = None (normal, no itching), 1.0 = Intermittent tickle sensation involving more than just the corner of the eye, 2.0 = Mild continuous itch without desire to rub, 3.0 = Severe itch with desire to rub, and 4.0 = Incapacitating itch with irresistible urge to rub.

    Time frame: 3, 5 and 7 minutes post-Conjunctival Allergen Challenge (CAC) on Day 1

Secondary outcomes

  1. Conjunctival Redness

    The investigator assessed conjunctival redness scores using a 5-point scale with 0.5 unit increments, wherein 0 = None (normal, no dilated blood vessels), 1 = Mild (slightly dilated blood vessels: pink color; can be quadrantal), 2 = Moderate (more apparent dilation, with redder color, involving majority of the vessel bed), 3 = Severe (numerous and obvious dilated blood vessels, with deep red color and no color, or less red with chemosis), and 4 = Extremely Severe (large, numerous, dilated blood vessels characterized by unusually severe deep red color regardless of chemosis and involving the entire vessel bed).

    Time frame: 7, 15 and 20 minutes post-Conjunctival Allergen Challenge (CAC) on Day 1

07

Results

Posted May 17, 2021

Participant flow

There were 65 participants enrolled (130 eyes). 38 participants received EM-100 in one eye and Zaditor in the other eye. 13 participants received EM-100 in one eye and vehicle in the other eye. 14 participants received Zaditor in one eye and vehicle in the other eye. Thus, of 65 participants, 51 received EM-100 in one of their eyes, 52 received Zaditor in one of their eyes, and 27 received vehicle in one of their eyes. Each participant received 2 of the 3 study treatments, one in each eye.

Participant flow — Overall Study
MilestoneEM-100Zaditor®Vehicle
Started515227
Completed515227
Not completed000

Outcome measures

PrimaryOcular Itching

Ocular itching scores were self-assessed by the participant using a 5-point scale with 0.5 unit increments, wherein 0 = None (normal, no itching), 1.0 = Intermittent tickle sensation involving more than just the corner of the eye, 2.0 = Mild continuous itch without desire to rub, 3.0 = Severe itch with desire to rub, and 4.0 = Incapacitating itch with irresistible urge to rub.

Time frame:
3, 5 and 7 minutes post-Conjunctival Allergen Challenge (CAC) on Day 1
Reported as:
Mean · score on a scale
Ocular Itching
score on a scaleEM-100Zaditor®Vehicle
3 minutes post CAC0.81 ± 0.7870.79 ± 0.7501.98 ± 0.935
5 minutes post CAC1.09 ± 1.0471.04 ± 0.9892.17 ± 1.00
7 minutes post CAC1.17 ± 1.1031.04 ± 1.0472.22 ± 1.032
SecondaryConjunctival Redness

The investigator assessed conjunctival redness scores using a 5-point scale with 0.5 unit increments, wherein 0 = None (normal, no dilated blood vessels), 1 = Mild (slightly dilated blood vessels: pink color; can be quadrantal), 2 = Moderate (more apparent dilation, with redder color, involving majority of the vessel bed), 3 = Severe (numerous and obvious dilated blood vessels, with deep red color and no color, or less red with chemosis), and 4 = Extremely Severe (large, numerous, dilated blood vessels characterized by unusually severe deep red color regardless of chemosis and involving the entire vessel bed).

Time frame:
7, 15 and 20 minutes post-Conjunctival Allergen Challenge (CAC) on Day 1
Reported as:
Mean · score on a scale
Conjunctival Redness
score on a scaleEM-100Zaditor®Vehicle
7 minutes post-CAC2.13 ± 0.8242.14 ± 0.7432.72 ± 0.725
15 minutes post-CAC2.25 ± 0.7832.29 ± 0.7372.61 ± 0.847
20 minutes post-CAC2.16 ± 0.8572.24 ± 0.7042.46 ± 0.784

Adverse events

Collected over 1 day. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Overall Participants0/65 (0%)0/65 (0%)0/65 (0%)

Baseline characteristics

Age, Continuous
Age, Continuous(years)Overall Participants
Mean44.4 ± 12.16
Sex: Female, Male
Sex: Female, Male(Participants)Overall Participants
Female44
Male21
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Overall Participants
American Indian or Alaska Native0
Asian0
Native Hawaiian or Other Pacific Islander0
Black or African American36
White29
More than one race0
Unknown or Not Reported0
Iris color
Iris color(Participants)Overall Participants
Black1
Blue8
Brown46
Hazel6
Green4
08

Study locations

1 site
  • Total Eye Care, PA
    Memphis, Tennessee 38119, United States
09

References and documents

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

Individual participant data

Plan to share: No

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Apr 2018 to primary completion in Apr 2018, 0 months.

Results were first posted in May 2021, 3 years after primary completion. A results delay was requested in Sep 2020.

Of 21 phase 3 interventional studies under Conjunctivitis, Allergic, half reached primary completion within 6 months of starting (the median), counting those still running; a quarter within 4 and three quarters within 14. This study's 0 months is below that.

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

Registered
Mar 29, 2018
First posted
Apr 6, 2018
StartActual
Apr 7, 2018
Primary completionActual
Apr 29, 2018
CompletionActual
Apr 29, 2018
Results delay requested
Sep 1, 2020
Results first posted
May 17, 2021
Last update
Jun 8, 2023
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 Jun 8, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT03489941
Collaborators
ORA, Inc.
Responsible party
Sponsor
First posted
Apr 6, 2018
Start date
Apr 7, 2018
Primary completion
Apr 29, 2018
Completion
Apr 29, 2018
Results posted
May 17, 2021
Last update
Jun 8, 2023

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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