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Clinical Trial Details — Status: Terminated

Administrative data

NCT number NCT04898023
Other study ID # 2035652
Secondary ID
Status Terminated
Phase Phase 2
First received
Last updated
Start date September 21, 2022
Est. completion date December 20, 2023

Study information

Verified date May 2024
Source University of Missouri-Columbia
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

Zinc and green tea supplementation have both been independently studied for supporting immune health during cold and flu-like illness in non-hospitalized patients with clinical trials demonstrating promising but inconsistent results. Combination therapy may offer an improved effect as the antioxidant compounds found in green tea have been shown to increase cellular zinc concentrations thereby inhibiting viral replication. This study seeks to evaluate the effect of combination supplementation using established doses of zinc and green tea extract on symptom duration and severity from cold and flu-like illness, including COVID-19, in adult community patients enrolled in a randomized placebo-controlled trial.


Recruitment information / eligibility

Status Terminated
Enrollment 17
Est. completion date December 20, 2023
Est. primary completion date October 31, 2023
Accepts healthy volunteers No
Gender All
Age group 18 Years and older
Eligibility Inclusion Criteria: 1. Provision of signed and dated informed consent form 2. Stated willingness to comply with all study procedures and availability for the duration of the study 3. Male or female, aged 18 years and older 4. Ability to take oral medication and be willing to adhere to the prescribed dosing regimen 5. Self-reported cold or flu symptoms for < 72 hours Exclusion Criteria: 1. Pregnant or actively seeking to become pregnant 2. Positive for influenza with planned treatment with oseltamivir or baloxavir 3. Current or planned treatment with an FDA regulated drug (including those under EUA) for COVID-19 4. Chronic liver disease (i.e. baseline liver function tests (LFTs) > 1.5x the upper limit of normal (ULN) or established cirrhosis 5. Chronic renal failure stage 4 or greater 6. History of kidney stones 7. Acute secondary bacterial infection at the time of enrollment 8. Requiring hospitalization for any reason at the time of enrollment 9. History of copper or iron deficiency 10. Current prescription for quinolone antibiotics, tetracycline antibiotics, or penicillamine at the time of enrollment 11. Allergy/intolerance to any of the active ingredients under investigation including zinc citrate, green tea, and ascorbic acid (vitamin C) 12. Patients without decision making capacity 13. Currently enrolled in another clinical trial for a respiratory viral infection

Study Design


Intervention

Drug:
zinc-green tea extract-ascorbic acid
Compounded capsules containing each zinc citrate, green tea extract, and ascorbic acid.
Placebo
Compounded capsules containing microcrystalline cellulose.

Locations

Country Name City State
United States University of Missouri Columbia Missouri

Sponsors (1)

Lead Sponsor Collaborator
University of Missouri-Columbia

Country where clinical trial is conducted

United States, 

Outcome

Type Measure Description Time frame Safety issue
Primary Rate of recovery from cold and flu-like symptoms Rate of recovery is defined as achieving a daily total symptom severity score of 0 or 1 within 7 days using an established 12 symptom scoring system with a severity scale ranging from 0-absent to 3-very severe for each symptom (max of 36 points) 7 days of follow-up
Secondary Rates of patient-reported adverse events Adverse events to be collected include: nausea, vomiting, indigestion, worsening of shortness of breath or difficulty breathing, allergic reaction including skin rash, and need to seek medical care (e.g. hospitalization or physician visit) for a suspected study drug related adverse effect 7 days of follow-up
Secondary Rates of patient-reported days of absence and/or healthcare visits Absence will include missed days from work or school and healthcare visits will include hospitalization or physician office visit(s) for respiratory viral illness related complications 7 days of follow-up
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