Try our beta test site
IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...

A Study to Evaluate the Safety and Efficacy of the QLT Proprietary Olopatadine-PPDS in Subjects With Seasonal Allergic Conjunctivitis to Ragweed in an Environmental Exposure Chamber Model.

This study has been terminated.
(Lack of definitive clinical results.)
Information provided by (Responsible Party):
Mati Therapeutics Inc. Identifier:
First received: January 27, 2011
Last updated: September 16, 2013
Last verified: September 2013
The purpose of this study is to test if olopatadine punctal plugs can reduce the symptoms (itching) of allergic conjunctivitis to ragweed in an Environmental Exposure Chamber model.

Condition Intervention Phase
Seasonal Allergic Conjunctivitis to Ragweed
Drug: Olopatadine
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Randomized, Double-Masked, Placebo-Controlled, Proof of Concept Study to Evaluate the Short-term Safety and Efficacy of the QLT Proprietary Olopatadine Punctal Plug Delivery System in Subjects With Seasonal Allergic Conjunctivitis to Ragweed in an Environmental Exposure Chamber Model.

Resource links provided by NLM:

Further study details as provided by Mati Therapeutics Inc.:

Primary Outcome Measures:
  • Safety of olopatadine-PPDS in subjects with seasonal allergic conjunctivitis to ragweed [ Time Frame: 4 Days ]
  • Change from baseline in subject-rated ocular itching scores in treated vs placebo control arms in subjects with seasonal allergic conjunctivitis to ragweed [ Time Frame: 4 days ]

Secondary Outcome Measures:
  • Change from baseline and observed values in subject rated ocular itching scores compared between lower puncta delivery and double puncta delivery arms [ Time Frame: 4 ]

Enrollment: 143
Study Start Date: October 2010
Study Completion Date: January 2011
Primary Completion Date: January 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Lower Puncta Delivery Drug: Olopatadine
low dose
Experimental: Double Puncta Delivery Drug: Olopatadine
high dose


Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • History of allergic conjunctivitis to ragweed for at least one year
  • Positive skin prick test to ragweed pollen within 12 months prior to visit 1
  • BCVA of at leat 20/400

Exclusion Criteria:

  • Structural lid abnormalities (ectropion, entropion)
  • Active lid disease ( ie moderate or severe blepharitis, meibomianitis) that requires medical treatment
  • Presence of follicular conjunctivitis, anterior uveitis or preauricular lymphadenopathy
  • History of ophthalmic abnormality, including a history of dry eye
  • Perennial allergic rhinoconjunctivitis having significant allergy to animal dander that cannot be avoided during the study period
  • History of chronic bacterial or viral ocular infection, such as herpes keratitis, and/or presence of active bacterial or viral ocular infection
  • presence of mucous discharge, excess lacrimation or burning as a symptoms of ocular disease
  • Currently on any chronic ocular topical medications
  • Use of topical or systemic ocular medications during the study period
  • History of complications, adverse events, trauma or disease in the nasolacrimal area
  • History of symptomatic epiphoria
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01287338

Canada, Ontario
Cetero Research
Toronto, Ontario, Canada
Sponsors and Collaborators
Mati Therapeutics Inc.
Study Director: Dipak Panigrahi, MD QLT Inc.
Principal Investigator: Deepen Patel, MD Cetero Research, San Antonio
  More Information

Responsible Party: Mati Therapeutics Inc. Identifier: NCT01287338     History of Changes
Other Study ID Numbers: PP0 AC 01
141741 ( Other Identifier: Health Canada: Therapeutic Products Directorate )
Study First Received: January 27, 2011
Last Updated: September 16, 2013

Additional relevant MeSH terms:
Conjunctivitis, Allergic
Conjunctival Diseases
Eye Diseases
Hypersensitivity, Immediate
Immune System Diseases
Olopatadine Hydrochloride
Anti-Inflammatory Agents, Non-Steroidal
Analgesics, Non-Narcotic
Sensory System Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Anti-Inflammatory Agents
Antirheumatic Agents
Anti-Allergic Agents
Histamine H1 Antagonists, Non-Sedating
Histamine H1 Antagonists
Histamine Antagonists
Histamine Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action processed this record on May 25, 2017