Ragweed Observational Study
Public ClinicalTrials.gov record NCT01398137. 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
An Observational Multi-Centre Field Study to Assess Symptom Scores and Rescue Medication Usage in Subjects With a History of Ragweed Allergen-Induced Rhinoconjunctivitis
Study identification
- NCT ID
- NCT01398137
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Lead sponsor
- Circassia Limited
- Industry
- Enrollment
- 90 participants
Conditions and interventions
Conditions
Interventions
Not listed
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
- Jun 30, 2011
- Primary completion
- Sep 30, 2011
- Completion
- Sep 30, 2011
- Last update posted
- Oct 26, 2011
2011
United States locations
- U.S. sites
- 10
- U.S. states
- 7
- U.S. cities
- 10
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Not listed | Owensboro | Kentucky | — | — |
| Not listed | Minneapolis | Minnesota | — | — |
| Not listed | Plymouth | Minnesota | — | — |
| Not listed | Rolla | Missouri | — | — |
| Not listed | St Louis | Missouri | — | — |
| Not listed | Warrensburg | Missouri | — | — |
| Not listed | High Point | North Carolina | — | — |
| Not listed | Canton | Ohio | — | — |
| Not listed | Springfield | Virginia | — | — |
| Not listed | Greenfield | Wisconsin | — | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT01398137, 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 Oct 26, 2011 · Synced Jun 26, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT01398137 live on ClinicalTrials.gov.