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ClinicalTrials.gov public records Last synced Jun 11, 2026, 5:10 AM EDT

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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Condition: Tamoxifen Clear all
Active, not recruiting Phase 2 Interventional Results available

A Study of Abemaciclib (LY2835219) Plus Tamoxifen or Abemaciclib Alone in Women With Metastatic Breast Cancer

NCT02747004
View directory record Official record
Conditions
Metastatic Breast Cancer
Interventions
Abemaciclib, Tamoxifen, Prophylactic Loperamide
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years and older · Female only
Enrollment
234 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2026
U.S. locations
5
States / cities
Tucson, Arizona • Lebanon, New Hampshire • Nashville, Tennessee + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 5, 2026 · Synced Jun 11, 2026, 5:10 AM EDT
Completed No phase listed Observational

Investigating the Impact of Tamoxifen Therapy on Ovarian Aging

NCT01384526
View directory record Official record
Conditions
Breast Cancer, Fertility
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
25 Years and older · Female only
Enrollment
266 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Mar 8, 2015 · Synced Jun 11, 2026, 5:10 AM EDT
Recruiting Early Phase 1 Interventional

FES Imaging to Optimize Tamoxifen for Metastatic Breast Cancer

NCT04174352
View directory record Official record
Conditions
ERα+ Breast Cancer, ESR1 Gene Mutation
Interventions
Tamoxifen, FES PET/CT
Drug · Diagnostic Test
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
19 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
2
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 21, 2025 · Synced Jun 11, 2026, 5:10 AM EDT
Terminated Phase 2 Interventional

Oral Tamoxifen vs. TamGel vs. Control in Women With Atypical Hyperplasia, Lobular Carcinoma In Situ, or Increased Breast Cancer Risk

NCT04570956
View directory record Official record
Conditions
Breast Atypical Hyperplasia, Breast Lobular Carcinoma in Situ, Breast Atypical Lobular Hyperplasia, Breast Carcinoma
Interventions
Tamoxifen, Topical 4-OHT( 4-hydroxytamoxifen)gel 4 mg/each breast/day, Placebo, Questionnaire Administration
Drug · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 80 Years · Female only
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
3
States / cities
Evanston, Illinois • Rochester, Minnesota • Camden, New Jersey
Source: ClinicalTrials.gov public record
Updated Jan 22, 2026 · Synced Jun 11, 2026, 5:10 AM EDT
Completed Phase 3 Interventional

Tamoxifen With or Without Octreotide in Treating Postmenopausal Women With Stage I, Stage II, or Stage III Breast Cancer

NCT00002864
View directory record Official record
Conditions
Breast Cancer
Interventions
octreotide acetate, tamoxifen citrate
Drug
Lead sponsor
NCIC Clinical Trials Group
Network
Eligibility
Up to 120 Years · Female only
Enrollment
667 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1996 – 2010
U.S. locations
2
States / cities
Duluth, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 31, 2020 · Synced Jun 11, 2026, 5:10 AM EDT
Completed Phase 3 Interventional

Hormone Therapy in Treating Postmenopausal Women With Receptor-Positive Breast Cancer

NCT00002646
View directory record Official record
Conditions
Breast Cancer
Interventions
fenretinide, tamoxifen citrate
Drug
Lead sponsor
Eastern Cooperative Oncology Group
Network
Eligibility
Female only
Enrollment
1,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1995
U.S. locations
85
States / cities
Mobile, Alabama • Phoenix, Arizona • Tucson, Arizona + 54 more
Source: ClinicalTrials.gov public record
Updated Jan 4, 2012 · Synced Jun 11, 2026, 5:10 AM EDT
Completed Phase 2 Interventional Results available

Lapatinib and Tamoxifen in Treating Patients With Locally Advanced or Metastatic Breast Cancer That Did Not Respond to Previous Tamoxifen

NCT00118157
View directory record Official record
Conditions
Estrogen Receptor Positive, Male Breast Carcinoma, Progesterone Receptor Positive, Recurrent Breast Carcinoma, Stage IIIB Breast Cancer, Stage IIIC Breast Cancer, Stage IV Breast Cancer
Interventions
Laboratory Biomarker Analysis, Lapatinib Ditosylate, Tamoxifen Citrate
Other · Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2014
U.S. locations
2
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Dec 3, 2017 · Synced Jun 11, 2026, 5:10 AM EDT
Completed Phase 3 Interventional Results available

Randomized Phase III Study Of Exemestane (Aromasin) For 5 Years Versus Tamoxifen for 2.5 to 3 Years Followed By Exemestane

NCT00036270
View directory record Official record
Conditions
Breast Neoplasms
Interventions
exemestane (Aromasin), tamoxifen + exemestane
Drug
Lead sponsor
Pfizer
Industry
Eligibility
50 Years and older · Female only
Enrollment
9,779 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2011
U.S. locations
179
States / cities
Bessemer, Alabama • Birmingham, Alabama • Flagstaff, Arizona + 139 more
Source: ClinicalTrials.gov public record
Updated Oct 27, 2015 · Synced Jun 11, 2026, 5:10 AM EDT
Completed Phase 2 Interventional

Tamoxifen Therapy in Amyotrophic Lateral Sclerosis [ALS]

NCT00214110
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis (ALS)
Interventions
Tamoxifen
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 90 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2005
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 4, 2015 · Synced Jun 11, 2026, 5:10 AM 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 Jun 11, 2026, 5:10 AM EDT
Completed Phase 2 Interventional Results available

Tamoxifen and Bortezomib to Treat Recurrent Brain Tumors

NCT00108069
View directory record Official record
Conditions
Glioma
Interventions
Tamoxifen citrate, Bortezomib
Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2013
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 4, 2015 · Synced Jun 11, 2026, 5:10 AM EDT
Completed No phase listed Observational Results available

Loss of Grip Strength, BMI, and Adjuvant Endocrine Therapy Breast Cancer

NCT01896050
View directory record Official record
Conditions
Breast Cancer, Arthralgia, Obesity
Interventions
anastrozole, letrozole, exemestane, Tamoxifen
Drug
Lead sponsor
University of Michigan Rogel Cancer Center
Other
Eligibility
18 Years and older · Female only
Enrollment
115 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 27, 2016 · Synced Jun 11, 2026, 5:10 AM 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 Jun 11, 2026, 5:10 AM EDT
Completed Phase 2 Interventional Results available

Tamoxifen Citrate in Treating Patients With Metastatic or Recurrent Breast Cancer

NCT01124695
View directory record Official record
Conditions
Breast Cancer, Stage IV Breast Cancer
Interventions
tamoxifen
Drug
Lead sponsor
ECOG-ACRIN Cancer Research Group
Network
Eligibility
18 Years and older
Enrollment
124 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2022
U.S. locations
292
States / cities
Birmingham, Alabama • Mobile, Alabama • Fort Smith, Arkansas + 203 more
Source: ClinicalTrials.gov public record
Updated Jun 28, 2023 · Synced Jun 11, 2026, 5:10 AM EDT
Terminated Phase 3 Interventional

Combination Chemotherapy Compared With Hormone Therapy in Treating Patients With Recurrent, Stage III, or Stage IV Endometrial Cancer

NCT00016341
View directory record Official record
Conditions
Endometrial Cancer
Interventions
filgrastim, cisplatin, doxorubicin hydrochloride, megestrol acetate, paclitaxel, tamoxifen citrate
Biological · Drug
Lead sponsor
Gynecologic Oncology Group
Network
Eligibility
Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2001
U.S. locations
49
States / cities
Birmingham, Alabama • Los Angeles, California • Los Gatos, California + 41 more
Source: ClinicalTrials.gov public record
Updated Apr 10, 2013 · Synced Jun 11, 2026, 5:10 AM EDT
Not listed Phase 2 Interventional

ERA-923 in Treating Postmenopausal Women With Metastatic Breast Cancer

NCT00006369
View directory record Official record
Conditions
Breast Cancer
Interventions
ERA-923
Drug
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2000
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Nov 5, 2013 · Synced Jun 11, 2026, 5:10 AM EDT
Completed Phase 2 Interventional Results available

Testing an Active Form of Tamoxifen (4-hydroxytamoxifen) Delivered Through Breast Skin to Control Ductal Carcinoma in Situ (DCIS) of the Breast

NCT02993159
View directory record Official record
Conditions
Ductal Breast Carcinoma In Situ, Estrogen Receptor Positive
Interventions
Afimoxifene, Laboratory Biomarker Analysis, Placebo, Tamoxifen Citrate
Drug · Other
Lead sponsor
Northwestern University
Other
Eligibility
18 Years and older · Female only
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
6
States / cities
Chicago, Illinois • Edgewood, Kentucky • Rochester, Minnesota + 3 more
Source: ClinicalTrials.gov public record
Updated Dec 17, 2024 · Synced Jun 11, 2026, 5:10 AM EDT
Completed No phase listed Observational

Effect of Pharmacogenomics Differences in Phase I and II Metabolism of Tamoxifen on Efficacy and Toxicity

NCT00886535
View directory record Official record
Conditions
Breast Cancer, Ductal Carcinoma in Situ
Interventions
Not listed
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2017
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 13, 2019 · Synced Jun 11, 2026, 5:10 AM EDT
Not listed Phase 3 Interventional

Prevention of Breast Cancer: As Simple as hCG-A Randomized Clinical Trial in High Risk Women

NCT00808522
View directory record Official record
Conditions
Breast Cancer
Interventions
hCG
Drug
Lead sponsor
New York Presbyterian Hospital
Other
Eligibility
30 Years to 75 Years · Female only
Enrollment
84 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 15, 2008 · Synced Jun 11, 2026, 5:10 AM EDT
Completed Phase 1 Interventional

Endoxifen in Adults With Hormone Receptor Positive Solid Tumors

NCT01273168
View directory record Official record
Conditions
Hormone Receptor-Positive Breast, Gynecologic, Desmoid, Hormone Receptor-Positive Neoplasms
Interventions
Z-Endoxifen
Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years to 120 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2025
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 22, 2025 · Synced Jun 11, 2026, 5:10 AM EDT
Completed Phase 2 Interventional Results available

Preoperative Hormone Therapy for Postmenopausal Women With ER+ Clinical Stage T2-4 Tumors

NCT01831076
View directory record Official record
Conditions
Breast Cancer, Stage II Breast Cancer, Stage III Breast Cancer
Interventions
Exemestane, Exemestane and tamoxifen
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
50 Years and older · Female only
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2022
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 2, 2022 · Synced Jun 11, 2026, 5:10 AM EDT
Completed Phase 2 Interventional Results available

Stellate Ganglion Block (SGB) For Women for Breast Cancer

NCT02513329
View directory record Official record
Conditions
Hot Flushes, Hot Flashes
Interventions
Bupivicaine, Saline
Drug
Lead sponsor
Northwestern University
Other
Eligibility
30 Years to 70 Years · Female only
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 4, 2023 · Synced Jun 11, 2026, 5:10 AM EDT
Not listed Phase 3 Interventional Results available

Letrozole in Treating Postmenopausal Women Who Have Received Hormone Therapy for Hormone Receptor-Positive Breast Cancer

NCT00382070
View directory record Official record
Conditions
Breast Cancer
Interventions
Letrozole, Placebo
Drug · Other
Lead sponsor
NSABP Foundation Inc
Network
Eligibility
18 Years to 120 Years · Female only
Enrollment
3,966 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2025
U.S. locations
777
States / cities
Anniston, Alabama • Mobile, Alabama • Anchorage, Alaska + 523 more
Source: ClinicalTrials.gov public record
Updated Mar 21, 2024 · Synced Jun 11, 2026, 5:10 AM EDT
Completed Phase 3 Interventional Results available

Suppression of Ovarian Function With Either Tamoxifen or Exemestane Compared With Tamoxifen Alone in Treating Premenopausal Women With Hormone-Responsive Breast Cancer

NCT00066690
View directory record Official record
Conditions
Estrogen Receptor Positive Breast Cancer, Progesterone Receptor Positive Tumor, Recurrent Breast Carcinoma, Stage IA Breast Cancer, Stage IB Breast Cancer, Stage IIA Breast Cancer, Stage IIB Breast Cancer, Stage IIIA Breast Cancer
Interventions
Exemestane, Laboratory Biomarker Analysis, Oophorectomy, Quality-of-Life Assessment, Radiation Therapy, Tamoxifen, Triptorelin
Drug · Other · Procedure + 1 more
Lead sponsor
ETOP IBCSG Partners Foundation
Network
Eligibility
18 Years to 65 Years · Female only
Enrollment
3,066 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2024
U.S. locations
480
States / cities
Birmingham, Alabama • Anchorage, Alaska • Scottsdale, Arizona + 323 more
Source: ClinicalTrials.gov public record
Updated Feb 5, 2026 · Synced Jun 11, 2026, 5:10 AM EDT