Echinacea Versus Placebo Effect in Common Cold (Physician Echinacea Placebo)
Public ClinicalTrials.gov record NCT00065715. 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
Placebo: Physician or Pill? A Randomized Trial in a Common Cold Model Funded by NIH NCCAM Under RFA "The Placebo Effect in Clinical Practice"
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The design and interpretation of randomized trials is intimately connected to the use of "placebo". The nature and magnitude of placebo effects, however, is very poorly understood. This study will assess and compare placebo effects and physician interaction effects within a community-acquired common cold model. The goal of this study is to assess two kinds of placebo affects and how physician interaction effects; 1. The effect of receiving blinded placebo, compared to no treatment; and 2. The effect of receiving open-label active Echinacea treatment compared to blinded active treatment.
Study identification
- NCT ID
- NCT00065715
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 3
- Enrollment
- 719 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 12 Years and older
- 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
- Aug 31, 2003
- Primary completion
- Jul 31, 2008
- Completion
- Mar 31, 2013
- Last update posted
- Dec 3, 2014
2003 – 2013
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| University of Wisconsin-Madison Department of Family Medicine | Madison | Wisconsin | 53706-1490 | — |
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 NCT00065715, 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 Dec 3, 2014 · Synced Sep 9, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00065715 live on ClinicalTrials.gov.