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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Tamoxifen Clear all
Completed Phase 2 Interventional

Chemoprevention Therapy Plus Surgery in Treating Women With Breast Cancer

NCT00003099
View directory record Official record
Conditions
Breast Cancer
Interventions
Fenretinide, Tamoxifen Citrate, Placebo
Drug · Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older · Female only
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1996 – 2003
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 29, 2012 · Synced Sep 27, 2026, 10:14 PM EDT
Completed No phase listed Observational

Effect of Counseling on Psychological Stress Amongst Women Felt to be at High Risk for Breast Cancer Development

NCT00381927
View directory record Official record
Conditions
Breast Cancer
Interventions
Physician Counseling
Behavioral
Lead sponsor
Baystate Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
1
States / cities
Springfield, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 19, 2007 · Synced Sep 27, 2026, 10:14 PM EDT
Completed Phase 3 Interventional Results available

Tamoxifen Compared With Thalidomide in Treating Women With Ovarian Epithelial Cancer, Fallopian Tube Cancer, or Primary Peritoneal Cancer

NCT00041080
View directory record Official record
Conditions
Fallopian Tube Cancer, Primary Peritoneal Cavity Cancer, Recurrent Ovarian Epithelial Cancer, Stage III Ovarian Epithelial Cancer, Stage IV Ovarian Epithelial Cancer
Interventions
tamoxifen citrate, thalidomide, laboratory biomarker analysis
Drug · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
Female only
Enrollment
139 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2011
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 29, 2019 · Synced Sep 27, 2026, 10:14 PM EDT
Completed Phase 2 Interventional

Tipifarnib Plus Tamoxifen in Treating Women With Metastatic Breast Cancer

NCT00052728
View directory record Official record
Conditions
Breast Cancer
Interventions
tamoxifen citrate, tipifarnib
Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2006
U.S. locations
2
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 18, 2013 · Synced Sep 27, 2026, 10:14 PM EDT
Completed No phase listed Observational

A Pilot Study of Varying Doses of Tamoxifen in the Setting of Genetic Polymorphisms of CYP2D6

NCT00900744
View directory record Official record
Conditions
Breast Cancer
Interventions
Tamoxifen
Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Enrollment
121 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 24, 2017 · Synced Sep 27, 2026, 10:14 PM EDT
Completed Phase 2 Interventional

Radiation Therapy and Tamoxifen in Treating Adults With Newly Diagnosed Supratentorial Glioblastoma Multiforme

NCT00006388
View directory record Official record
Conditions
Brain and Central Nervous System Tumors
Interventions
tamoxifen citrate, radiation therapy
Drug · Radiation
Lead sponsor
Radiation Therapy Oncology Group
Network
Eligibility
18 Years and older
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2000
U.S. locations
237
States / cities
Birmingham, Alabama • Huntsville, Alabama • Mobile, Alabama + 184 more
Source: ClinicalTrials.gov public record
Updated Oct 21, 2020 · Synced Sep 27, 2026, 10:14 PM EDT
Completed No phase listed Observational

The Clinical and Economic Impact of Pharmacogenomic Testing for Tamoxifen Metabolism in Postmenopausal Women Receiving Tamoxifen for Prevention of Recurrent Breast Cancer

NCT00830973
View directory record Official record
Conditions
Breast Neoplasms, Tamoxifen
Interventions
Poor Metabolism Status Follow Up Therapy Considerations, CYP2D6 Inhibiting Drugs
Other
Lead sponsor
Medco Health Solutions, Inc.
Industry
Eligibility
50 Years and older · Female only
Enrollment
184 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
1
States / cities
Franklin Lakes, New Jersey
Source: ClinicalTrials.gov public record
Updated Oct 13, 2009 · Synced Sep 27, 2026, 10:14 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Hormonal Effects on Tc-99m Sestamibi Uptake in the Breast

NCT00943527
View directory record Official record
Conditions
Breast Cancer
Interventions
Not listed
Lead sponsor
Mayo Clinic
Other
Eligibility
35 Years to 45 Years · Female only
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 24, 2012 · Synced Sep 27, 2026, 10:14 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Cognition in the Study of Tamoxifen and Raloxifene

NCT00687102
View directory record Official record
Conditions
Cognition, Aging
Interventions
tamoxifen, raloxifene
Drug
Lead sponsor
Wake Forest University
Other
Eligibility
65 Years and older · Female only
Enrollment
1,498 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001 – 2008
U.S. locations
127
States / cities
Phoenix, Arizona • Tucson, Arizona • Camp Pendleton, California + 102 more
Source: ClinicalTrials.gov public record
Updated Sep 11, 2018 · Synced Sep 27, 2026, 10:14 PM EDT
Completed Phase 2 Interventional

Study of Tamoxifen in Well Differentiated Neuroendocrine Tumors and Hormone Receptor Positive Expression

NCT03870399
View directory record Official record
Conditions
Neuroendocrine Tumors, Progesterone Receptor Positive Tumor, Estrogen Receptor Positive Tumor
Interventions
Tamoxifen
Drug
Lead sponsor
AC Camargo Cancer Center
Other
Eligibility
18 Years and older
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated May 5, 2024 · Synced Sep 27, 2026, 10:14 PM EDT
Completed Phase 3 Interventional

A Trial Comparing the Efficacy and Tolerability of Faslodex With Nolvadex in Postmenopausal Women With Advanced Breast Cancer

NCT00241449
View directory record Official record
Conditions
Breast Cancer, Metastasis
Interventions
Fulvestrant, Tamoxifen
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
Female only
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2012
U.S. locations
24
States / cities
Little Rock, Arkansas • Fountain Valley, California • La Jolla, California + 21 more
Source: ClinicalTrials.gov public record
Updated Jun 5, 2012 · Synced Sep 27, 2026, 10:14 PM EDT
Completed Not applicable Interventional

Diindolylmethane in Treating Patients With Breast Cancer

NCT01391689
View directory record Official record
Conditions
Stage IA Breast Cancer, Stage IB Breast Cancer, Stage II Breast Cancer, Stage IIIA Breast Cancer
Interventions
diindolylmethane, placebo
Dietary Supplement
Lead sponsor
University of Arizona
Other
Eligibility
19 Years and older · Female only
Enrollment
144 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Nov 5, 2017 · Synced Sep 27, 2026, 10:14 PM EDT
Not yet recruiting Phase 2 Interventional

Randomized Double-Blind Phase II Trial of Baby Exemestane Versus Baby Tamoxifen in Post-Menopausal Women at High Risk for Breast Cancer

NCT07499999
View directory record Official record
Conditions
Breast Cancer, Ductal Carcinoma, Estrogen-receptor-positive Breast Cancer, Atypical Lobular Hyperplasia, BRCA2 Mutation, CHEK2 Gene Mutation, Ataxia Telangiectasia Mutated Gene Mutation
Interventions
Exemestane, Tamoxifen
Drug
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
Female only
Enrollment
140 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 29, 2026 · Synced Sep 27, 2026, 10:14 PM EDT
Completed No phase listed Observational

Effect of Tamoxifen or an Aromatase Inhibitor on Estrogen Metabolism in Women Treated for Newly Diagnosed Breast Cancer

NCT00569543
View directory record Official record
Conditions
Breast Cancer
Interventions
high performance liquid chromatography, laboratory biomarker analysis, mass spectrometry, medical chart review
Other
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older · Female only
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2012
U.S. locations
2
States / cities
Rochester, Minnesota • Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Aug 31, 2023 · Synced Sep 27, 2026, 10:14 PM EDT
Completed Phase 2 Interventional Results available

Phase II Trial of SAHA & Tamoxifen for Patients With Breast Cancer

NCT00365599
View directory record Official record
Conditions
Breast Cancer
Interventions
suberoylanilide hydroxamic acid (SAHA, Vorinostat), tamoxifen citrate (Tamoxifen)
Drug
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
18 Years and older
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2012
U.S. locations
8
States / cities
San Francisco, California • Boynton Beach, Florida • Orlando, Florida + 5 more
Source: ClinicalTrials.gov public record
Updated Nov 20, 2014 · Synced Sep 27, 2026, 10:14 PM EDT
Active, not recruiting Phase 3 Interventional

An Adjuvant Endocrine-based Therapy Study of Camizestrant (AZD9833) in ER+/HER2- Early Breast Cancer (CAMBRIA-2)

NCT05952557
View directory record Official record
Conditions
Breast Cancer, Early Breast Cancer
Interventions
Camizestrant, Tamoxifen, Anastrozole, Letrozole, Exemestane, Abemaciclib
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 130 Years
Enrollment
5,511 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2037
U.S. locations
111
States / cities
Dothan, Alabama • Phoenix, Arizona • Tucson, Arizona + 98 more
Source: ClinicalTrials.gov public record
Updated Aug 9, 2026 · Synced Sep 27, 2026, 10:14 PM EDT
Active, not recruiting Phase 2 Interventional

SHORTened Duration of TAMoxifen

NCT07806630
View directory record Official record
Conditions
High Risk for Invasive Breast Cancer
Interventions
Tamoxifen, Tamoxifen (Nolvadex)
Drug
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
30 Years and older
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Sep 7, 2026 · Synced Sep 27, 2026, 10:14 PM EDT
Completed Phase 3 Interventional Results available

Randomized Trial Of Exemestane Versus Continued Tamoxifen In Postmenopausal Women With Early Breast Cancer

NCT00038467
View directory record Official record
Conditions
Breast Neoplasms
Interventions
Tamoxifen, Exemestane
Drug
Lead sponsor
Pfizer
Industry
Eligibility
30 Years and older · Female only
Enrollment
4,740 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2013
U.S. locations
57
States / cities
Birmingham, Alabama • Green Valley, Arizona • Green Velley, Arizona + 36 more
Source: ClinicalTrials.gov public record
Updated May 6, 2014 · Synced Sep 27, 2026, 10:14 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Genetic Risk Estimation of Breast Cancer Prior to Preventive Medication Uptake

NCT02517593
View directory record Official record
Conditions
Breast Cancer
Interventions
Polygenic Risk Score
Genetic
Lead sponsor
Mayo Clinic
Other
Eligibility
35 Years to 75 Years · Female only
Enrollment
151 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Dec 29, 2020 · Synced Sep 27, 2026, 10:14 PM EDT
Terminated Phase 2 Interventional Results available

Reversing Therapy Resistance With Epigenetic-Immune Modification

NCT02395627
View directory record Official record
Conditions
Breast Neoplasms
Interventions
Tamoxifen, Vorinostat, Pembrolizumab
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jul 6, 2020 · Synced Sep 27, 2026, 10:14 PM EDT
Completed Phase 1 Interventional

Fourteen Day Safety of Low-Dose Tamoxifen in Patients With Chronic Hepatitis C Who Have Failed Standard Medical Therapy

NCT00749138
View directory record Official record
Conditions
Chronic Hepatitis C
Interventions
tamoxifen
Drug
Lead sponsor
Bader, Ted, M.D.
Individual
Eligibility
18 Years to 75 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Mar 8, 2010 · Synced Sep 27, 2026, 10:14 PM EDT
Completed Phase 2 Interventional

Tamoxifen, Carboplatin, and Topotecan in Treating Patients With CNS Metastases or Recurrent Brain or Spinal Cord Tumors

NCT00541138
View directory record Official record
Conditions
Brain and Central Nervous System Tumors, Metastatic Cancer, Unspecified Adult Solid Tumor, Protocol Specific
Interventions
carboplatin, tamoxifen citrate, topotecan hydrochloride, pharmacological study
Drug · Other
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2007
U.S. locations
1
States / cities
Duarte, California
Source: ClinicalTrials.gov public record
Updated Sep 20, 2011 · Synced Sep 27, 2026, 10:14 PM EDT
Completed Phase 2 Interventional Results available

Tamoxifen for Progressive Transitional Cell Carcinoma Following Previous Chemotherapy Treatment

NCT00710970
View directory record Official record
Conditions
Urinary Bladder Neoplasms
Interventions
Tamoxifen
Drug
Lead sponsor
Seth Lerner
Other
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 23, 2022 · Synced Sep 27, 2026, 10:14 PM EDT
Recruiting Phase 2 Interventional

Tamoxifen and Pegylated Liposomal Doxorubicin for the Treatment of Patients With Metastatic or Inoperable, Locally Advanced Triple Negative Breast Cancer

NCT06434064
View directory record Official record
Conditions
Anatomic Stage III Breast Cancer AJCC v8, Anatomic Stage IV Breast Cancer AJCC v8, Locally Advanced Unresectable Triple-Negative Breast Carcinoma, Metastatic Triple-Negative Breast Carcinoma
Interventions
Biopsy, Biospecimen Collection, Computed Tomography, Echocardiography, Magnetic Resonance Imaging, Pegylated Liposomal Doxorubicin Hydrochloride, Tamoxifen
Procedure · Drug
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Apr 23, 2026 · Synced Sep 27, 2026, 10:14 PM EDT