# Echinacea Versus Placebo Effect in Common Cold (Physician Echinacea Placebo)

> **NCT00065715** · PHASE3 · COMPLETED · sponsor: **University of Wisconsin, Madison** · enrollment: 719 (actual)

## Conditions studied

- Common Cold

## Interventions

- **DIETARY_SUPPLEMENT:** Echinacea
- **OTHER:** Blinded placebo

## Key facts

- **NCT ID:** NCT00065715
- **Lead sponsor:** University of Wisconsin, Madison
- **Sponsor class:** OTHER
- **Phase:** PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2003-09
- **Primary completion:** 2008-08
- **Final completion:** 2013-04
- **Target enrollment:** 719 (ACTUAL)
- **Last updated:** 2014-12-04

## Collaborators

- [object Object]
- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00065715

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00065715, "Echinacea Versus Placebo Effect in Common Cold (Physician Echinacea Placebo)". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT00065715. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*