Efficacy and Safety of PQ Grass in Subjects With Seasonal Allergic Rhinitis and/or Rhinoconjunctivitis Induced by Grass Pollen
Public ClinicalTrials.gov record NCT05540717. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
A Randomised, Double-blind, Placebo-controlled Clinical Trial to Evaluate the Efficacy and Safety of PQ Grass in Subjects With Seasonal Allergic Rhinitis and/or Rhinoconjunctivitis Induced by Grass Pollen Exposure
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The PQGrass306 (G306) clinical trial is the pivotal Phase III efficacy clinical trial of PQ Grass. The aim of the G306 pivotal clinical trial is to confirm the efficacy and safety of the optimal effective dose of PQ Grass 27600 SU. This will be determined through the measurements of the effect of PQ Grass on the symptoms of seasonal allergic rhinitis (SAR)/rhinoconjunctivitis and the use of relief medications to control these symptoms during the peak grass pollen season (GPS).
Study identification
- NCT ID
- NCT05540717
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 3
- Enrollment
- 555 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 18 Years to 65 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Oct 11, 2022 (Actual)
- Primary completion
- Nov 1, 2023 (Actual)
- Completion
- Nov 1, 2023 (Actual)
- Last update posted
- Apr 2, 2025
2022 – 2023
United States locations
- U.S. sites
- 33
- U.S. states
- 18
- U.S. cities
- 30
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| IMMUNOe Research Centers | Centennial | Colorado | 80112 | — |
| Velocity Clinical Research Denver | Denver | Colorado | 80209 | — |
| Allergy Partners of Central Kentucky | Lexington | Kentucky | 40503 | — |
| Allergy and Asthma Associates of Bluegrass | Lexington | Kentucky | 40509 | — |
| Family Allergy Asthma Research Institute | Louisville | Kentucky | 40202 | — |
| Allergy & Asthma Specialists PSC | Owensboro | Kentucky | 42301 | — |
| Northern Light Allergy and Immunology | Bangor | Maine | 04401 | — |
| Paul A. Shapero M.D. | Bangor | Maine | 04401 | — |
| Chesapeake Clinical Research Inc | White Marsh | Maryland | 21162 | — |
| Respiratory Medicine Research Institute of Michigan | Ypsilanti | Michigan | 48197 | — |
| Clinical Research of The Ozarks Inc - Warrensburg | Columbia | Missouri | 65203 | — |
| Montana Medical Research | Missoula | Montana | 59808 | — |
| Nebraska Medical Research Institute, The Asthma & Allergy Center | Bellevue | Nebraska | 68123 | — |
| Parikh Institute for Research LLC | Highland Park | New Jersey | 08904 | — |
| Atlantic Research Center LLC | Ocean City | New Jersey | 07712 | — |
| Weiss Medical | Riverdale | New Jersey | 07457 | — |
| Allergy Asthma and Immunology Research Institute | Charlotte | North Carolina | 28204 | — |
| Cincinnati Allergy and Asthma Center | Cincinnati | Ohio | 45209 | — |
| Bernstein Clinical Research Center, LLC | Cincinnati | Ohio | 45236 | — |
| Optimed Research Ltd | Columbus | Ohio | 43235 | — |
| Toledo Institute of Clinical Research Inc | Toledo | Ohio | 43617 | — |
| Oklahoma Institute of Allergy and Asthma Clinical Research, LLC - CRN - PPDS | Oklahoma City | Oklahoma | 73131 | — |
| Velocity Clinical Research, Inc | Grants Pass | Oregon | 97527 | — |
| Velocity Clinical Research - Medford - ERN - PPDS | Medford | Oregon | 97504 | — |
| Northwest Research Center | Portland | Oregon | 97202 | — |
| Allergy & Asthma Specialists | Blue Bell | Pennsylvania | 19422 | — |
| Allergy and Clinical Immunology Associates | Pittsburgh | Pennsylvania | 15241 | — |
| Allergy Associate of Utah | Murray | Utah | 84107 | — |
| Lysosomal Rare Disorders Research & Treatment Center | Fairfax | Virginia | 22030-7404 | — |
| Eastern Virginia Medical School | Norfolk | Virginia | 23507 | — |
| Bellingham Asthma Allergy and Immunology Clinic | Bellingham | Washington | 98225 | — |
| Allergy, Asthma & Sinus Center, S.C. | Greenfield | Wisconsin | 53228 | — |
| University of Wisconsin Clinical Science Center | Madison | Wisconsin | 53792 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
Non-U.S. locations
This page focuses on the U.S. directory. The official record also lists 69 non-U.S. sites.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT05540717, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Apr 2, 2025 · Synced Oct 21, 2026
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Open the official record
The complete public registry record, listed eligibility criteria, and available contact information for NCT05540717 live on ClinicalTrials.gov.