Environmental Exposure Unit Trial in Subjects With Ragweed-induced Allergic Rhinitis (NCT07556393) | Clinical Trial Compass
CompletedPhase 2
Environmental Exposure Unit Trial in Subjects With Ragweed-induced Allergic Rhinitis
Canada78 participantsStarted 2026-01-19
Plain-language summary
The purpose of this trial is to see how well an experimental nasal spray, called INI-2004, works for those with allergy symptoms to ragweed. This nasal spray will compare how well 500mcg of INI-2004, given once per week for 4 weeks, works at reducing ragweed allergy symptoms in an Environmental Exposure Unit (EEU), compared to placebo.
Who can participate
Age range
18 Years – 64 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion criteria
. Must have given valid written informed consent, before any study-related activities are carried out and must be able to understand the full nature and purpose of the trial, including possible risks and adverse effects.
. Healthy male or female, aged between 18 and 64 years, inclusive at screening.
. Minimum 12-month history of ragweed-induced AR requiring pharmacotherapy (self-reported history accepted), history of or current positive ragweed skin prick test reaction (≥ 5mm greater than the diluent) at SV1, and a TNSS score of ≥ 6 at 2 timepoints during the SV2 ragweed allergen EEU challenge, including a "congestion" score of ≥ 2 at ≥ 1 time point.
. Body mass index (BMI) of 17 to 39 kg/m2, inclusive, at screening. Subjects with BMI \> 39 kg/m2 may be included with permission of the Sponsor.
. Participant is medically healthy (in the opinion of the PI \[or delegate\]), as determined by medical history and without clinically significant abnormalities including:
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Assessment of incidence, severity and relationship of treatment-emergent adverse events (TEAEs), leading to discontinuation of study treatment
Timeframe: Baseline (SV2) vs Day 24
2
Calculate the change from baseline (SV2) vs D24 in Total Nasal Symptom Score (TNSS) during the chamber exposure (AUC0-180) for all subjects
. Physical examination without any additional clinically relevant findings
. Vital signs (pulse, blood pressure, respiratory rate, temperature) without clinically significant abnormalities, in the opinion of the PI (or delegate).
. Electrocardiogram without clinically significant abnormality at screening including QT interval corrected for Fredericia (QTcF) ≤ 450 msec for male subjects and ≤ 470 msec for female subjects. The ECG may be repeated if technically unsatisfactory (e.g. artifact) or otherwise thought not to be representative, at the discretion of the Investigator.
Exclusion criteria
. Hypersensitivity or other clinically significant reaction to the study drug or its active ingredients.
. History of perennial allergic rhinitis which may confound study results.
. Ragweed targeted allergy immunotherapy within five years of screening.
. Expected travel to an area with potential environmental ragweed exposure within 7 days of SV2 through Day 38.
. History of any clinically relevant or unstable disorder which, in the opinion of the PI (or delegate) would make implementation of the protocol or interpretation of study results difficult, or that would put the subject at risk by participating in the study, including uncontrolled cardiovascular, hematologic, pulmonary, hepatic, renal, gastrointestinal, connective tissue disease, immunologic, uncontrolled endocrine/metabolic, oncologic (within the last 5 years), neurologic, and psychiatric diseases. Note: a history of fully resolved childhood asthma is not exclusionary; history of cholecystectomy is not exclusionary; history of anxiety and/or depression is permitted provided symptoms are controlled on or off approved concomitant medication for at least 6 months prior to SV1. Local malignancies with complete surgical resection (e.g. basal cell carcinoma, cervical cancer-in-situ) are not exclusionary.
. Asthma that requires regular pharmacotherapy, is expected to require regular pharmacotherapy during study participation, or that is expected to be exacerbated by ragweed EEU challenge. Note: PRN pharmacotherapy for asthma is permitted, as long as there has been no use within 14 days prior to the first dose of study drug on Day 0. Participants must refrain from use during the study, unless medically necessary.
. Currently experiencing symptomatic perennial rhinitis requiring medication as per PI (or delegate) judgement.
. Use of oral or systemic steroids within 28 days of SV2, oral anti-histamines within 14 days of SV2, and intranasal medications, or any prescription or over-the-counter medication within 7 days prior to SV2 or expected use during study conduct from 7 days before Day 0 through Day 38, that would affect TNSS scores, in the opinion of the PI (or delegate). Topical steroids are allowable.