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Showing 1–15 of 15 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Polyphenon E and Placebo Clear all
Completed Phase 2 Interventional Results available

Study of Polyphenon E in Men With High-grade Prostatic Intraepithelial Neoplasia

NCT00596011
View directory record Official record
Conditions
Prostatic Hyperplasia
Interventions
Polyphenon E, Placebo
Drug
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
30 Years to 80 Years · Male only
Enrollment
97 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2018
U.S. locations
10
States / cities
Gainesville, Florida • Jacksonville, Florida • Lakeland, Florida + 5 more
Source: ClinicalTrials.gov public record
Updated Oct 3, 2019 · Synced Sep 21, 2026, 10:16 PM EDT
Completed Phase 2 Interventional Results available

Green Tea Extract in Treating Patients With Nonmetastatic Bladder Cancer

NCT00666562
View directory record Official record
Conditions
Stage I Bladder Cancer, Stage II Bladder Cancer, Stage III Bladder Cancer
Interventions
Defined Green Tea Catechin Extract, Laboratory Biomarker Analysis, Pharmacological Study, Placebo, Therapeutic Conventional Surgery
Dietary Supplement · Other · Drug + 1 more
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2017
U.S. locations
6
States / cities
Birmingham, Alabama • Burlington, Massachusetts • Minneapolis, Minnesota + 3 more
Source: ClinicalTrials.gov public record
Updated Nov 16, 2017 · Synced Sep 21, 2026, 10:16 PM EDT
Terminated Phase 2 Interventional Results available

Safety and Neuroprotective Effects of Polyphenon E in MS; Phase II

NCT01451723
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Polyphenon E, Placebo
Drug · Other
Lead sponsor
Louisiana State University Health Sciences Center in New Orleans
Other
Eligibility
18 Years to 60 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Mar 13, 2014 · Synced Sep 21, 2026, 10:16 PM EDT
Terminated Phase 2 Interventional

Defined Green Tea Catechin Extract in Treating Patients With Localized Prostate Cancer Undergoing Surgery

NCT01340599
View directory record Official record
Conditions
Stage I Prostate Cancer, Stage IIA Prostate Cancer, Stage IIB Prostate Cancer
Interventions
defined green tea catechin extract, placebo, immunohistochemistry staining method, immunoenzyme technique, questionnaire administration, therapeutic conventional surgery, high performance liquid chromatography, mass spectrometry
Dietary Supplement · Other · Procedure
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
45 Years to 75 Years · Male only
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 14, 2012 · Synced Sep 21, 2026, 10:16 PM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers Results available

Sexual Penetration Pain in Postmenopausal Women: A Topical Botanical Drug Treatment

NCT03682601
View directory record Official record
Conditions
Sexual Pain Disorders, Postmenopausal Symptoms, Vulvovaginal Atrophy, Female Sexual Dysfunction, Dyspareunia, Vulvodynia, Vestibulodynia, Arousal Disorders, Sexual, Genito-Pelvic Pain/Penetration Disorder, Female Sexual Arousal Disorder
Interventions
5% sinecatechins ointment, Placebo, 10% sinecatechins ointment
Drug
Lead sponsor
GTO Pharmaceutical, LLC
Other
Eligibility
20 Years to 70 Years · Female only
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
4
States / cities
New York, New York • Nyack, New York
Source: ClinicalTrials.gov public record
Updated Jul 26, 2022 · Synced Sep 21, 2026, 10:16 PM EDT
Completed Phase 2 Interventional Results available

Green Tea Extract in Preventing Cervical Cancer in Patients With Human Papillomavirus and Low-Grade Cervical Intraepithelial Neoplasia

NCT00303823
View directory record Official record
Conditions
Cervical Cancer, Cervical Intraepithelial Neoplasia Grade 1, Human Papilloma Virus Infection
Interventions
placebo, defined green tea catechin extract, laboratory biomarker analysis
Drug · Dietary Supplement · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older · Female only
Enrollment
98 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2011
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated May 4, 2015 · Synced Sep 21, 2026, 10:16 PM EDT
Active, not recruiting Phase 2 Interventional

To Evaluate if Green Tea Can be Effective in Reducing the Progression of Prostate Cancer in Men on Close Monitoring

NCT04597359
View directory record Official record
Conditions
Prostate Carcinoma
Interventions
Placebo Administration, Quality-of-Life Assessment, Questionnaire Administration, Sinecatechins
Drug · Other
Lead sponsor
ECOG-ACRIN Cancer Research Group
Network
Eligibility
21 Years and older
Enrollment
360 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
345
States / cities
Fairbanks, Alaska • Phoenix, Arizona • Fayetteville, Arkansas + 224 more
Source: ClinicalTrials.gov public record
Updated Sep 3, 2026 · Synced Sep 21, 2026, 10:16 PM EDT
Completed Phase 2 Interventional Results available

Green Tea or Polyphenon E in Preventing Lung Cancer in Former Smokers With Chronic Obstructive Pulmonary Disease

NCT00363805
View directory record Official record
Conditions
Lung Cancer Prevention
Interventions
green tea, Polyphenon E, placebo
Dietary Supplement · Drug · Other
Lead sponsor
Sherry Chow
Other
Eligibility
40 Years to 80 Years
Enrollment
178 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2004
U.S. locations
3
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Nov 27, 2013 · Synced Sep 21, 2026, 10:16 PM EDT
Completed Phase 2 Interventional Results available

Pilot Study of Green Tea Extract (Polyphenon E®)in Ulcerative Colitis

NCT00718094
View directory record Official record
Conditions
Mild to Moderately Active Ulcerative Colitis
Interventions
Polyphenon E®, Placebo Oral Tablet
Drug
Lead sponsor
University of Louisville
Other
Eligibility
18 Years to 85 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Dec 13, 2017 · Synced Sep 21, 2026, 10:16 PM EDT
Completed Phase 2 Interventional

Erlotinib and Green Tea Extract (Polyphenon® E) in Preventing Cancer Recurrence in Former Smokers Who Have Undergone Surgery for Bladder Cancer

NCT00088946
View directory record Official record
Conditions
Bladder Cancer
Interventions
Polyphenon E, erlotinib hydrochloride, Erlotinib placebo, Polyphenon E
Dietary Supplement · Drug · Other
Lead sponsor
Jonsson Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
5
States / cities
Phoenix, Arizona • Los Angeles, California • Santa Monica, California + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 30, 2020 · Synced Sep 21, 2026, 10:16 PM EDT
Completed Phase 1 Interventional Results available

Study to Evaluate Safety and Toxicity of Polyphenon E (EGCG) in HIV-1-Infected Individuals

NCT01433289
View directory record Official record
Conditions
HIV Infection
Interventions
Polyphenon E, Placebo
Drug
Lead sponsor
Baylor College of Medicine
Other
Eligibility
18 Years to 65 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
2
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 18, 2023 · Synced Sep 21, 2026, 10:16 PM EDT
Completed Phase 3 Interventional

Efficacy and Safety Study of Polyphenon E to Treat External Genital Warts

NCT00449982
View directory record Official record
Conditions
Condylomata Acuminata
Interventions
Polyphenon E Ointment 10%, Polyphenon E Ointment 15%
Drug
Lead sponsor
MediGene
Industry
Eligibility
18 Years and older
Enrollment
480 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2004
U.S. locations
6
States / cities
Davis, San Diego, California • Denver, Colorado • New York, New York + 3 more
Source: ClinicalTrials.gov public record
Updated Mar 20, 2007 · Synced Sep 21, 2026, 10:16 PM EDT
Terminated Phase 2 Interventional

Green Tea Extract in Treating Patients With Actinic Keratosis

NCT00005097
View directory record Official record
Conditions
Non-melanomatous Skin Cancer
Interventions
Polyphenon E and Placebo
Drug
Lead sponsor
Frank Meyskens
Other
Eligibility
18 Years and older
Enrollment
88 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2002
U.S. locations
1
States / cities
Orange, California
Source: ClinicalTrials.gov public record
Updated Apr 4, 2018 · Synced Sep 21, 2026, 10:16 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Fish Oil and Green Tea Extract in Preventing Prostate Cancer in Patients Who Are at Risk for Developing Prostate Cancer

NCT00253643
View directory record Official record
Conditions
Precancerous Condition, Prostate Cancer
Interventions
green tea catechin extract, fish oil, placebo
Dietary Supplement · Other
Lead sponsor
OHSU Knight Cancer Institute
Other
Eligibility
21 Years to 120 Years · Male only
Enrollment
89 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2013
U.S. locations
3
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 17, 2017 · Synced Sep 21, 2026, 10:16 PM EDT
Completed Phase 1 Interventional

Defined Green Tea Catechins in Treating Patients With Prostate Cancer Undergoing Surgery to Remove the Prostate

NCT00459407
View directory record Official record
Conditions
Adenocarcinoma of the Prostate, Stage I Prostate Cancer, Stage II Prostate Cancer
Interventions
defined green tea catechin extract, placebo, immunohistochemistry staining method, immunoenzyme technique, laboratory biomarker analysis, biopsy, mass spectrometry, high performance liquid chromatography
Dietary Supplement · Drug · Other + 1 more
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older · Male only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Oct 7, 2014 · Synced Sep 21, 2026, 10:16 PM EDT