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ClinicalTrials.gov public records Last synced Oct 5, 2026, 12:27 AM EDT

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Showing 73–93 of 93 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Estrogen Receptor Antagonist Clear all
Completed Phase 1Phase 2 Interventional Results available

68-Ga-RM2 PET/MRI in Imaging Patients With Estrogen Receptor-Positive Breast Cancer

NCT03831711
View directory record Official record
Conditions
Breast Carcinoma, Estrogen Receptor Positive
Interventions
Gallium Ga 68-labeled GRPR Antagonist BAY86-7548, Magnetic Resonance Imaging, Positron Emission Tomography, Investigational software and coils in PET/MR scan
Drug · Procedure · Device
Lead sponsor
Andrei Iagaru
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Dec 13, 2023 · Synced Oct 5, 2026, 12:27 AM EDT
Completed No phase listed Observational Results available

Study to Compare Overall Survival in Medicare Patients With Metastatic Breast Cancer Treated With a Medicine Called Palbociclib in Combination With Aromatase Inhibitor and Aromatase Inhibitor by Itself.

NCT06086340
View directory record Official record
Conditions
Breast Cancer
Interventions
Palbociclib, Aromatase Inhibitor
Drug
Lead sponsor
Pfizer
Industry
Eligibility
65 Years and older
Enrollment
779 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 18, 2025 · Synced Oct 5, 2026, 12:27 AM EDT
Completed Phase 2 Interventional Results available

Bevacizumab and Combination Chemotherapy in Patients With Lymph Node Positive Breast Cancer

NCT00119262
View directory record Official record
Conditions
Male Breast Cancer, Stage II Breast Cancer, Stage IIIA Breast Cancer, Stage IIIB Breast Cancer
Interventions
doxorubicin hydrochloride, cyclophosphamide, bevacizumab, paclitaxel, filgrastim, pegfilgrastim, radiation therapy, tamoxifen citrate, aromatase inhibition therapy
Drug · Biological · Radiation
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
226 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2009
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 15, 2014 · Synced Oct 5, 2026, 12:27 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 5, 2023 · Synced Oct 5, 2026, 12:27 AM EDT
Completed Phase 3 Interventional

Calcium With or Without Estrogen and/or Risedronate in Preventing Osteoporosis in Patients With Prostate Cancer

NCT00043069
View directory record Official record
Conditions
Osteoporosis, Prostate Cancer
Interventions
calcium carbonate, cholecalciferol, Estrogen Antagonists, risedronate sodium, placebo
Dietary Supplement · Drug · Other
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older · Male only
Enrollment
71 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2010
U.S. locations
112
States / cities
Scottsdale, Arizona • Jacksonville, Florida • Aurora, Illinois + 71 more
Source: ClinicalTrials.gov public record
Updated Dec 7, 2016 · Synced Oct 5, 2026, 12:27 AM EDT
Active, not recruiting Phase 2 Interventional

Levels of Circulating Tumor DNA as a Predictive Marker for Early Switch in Treatment for Patients With Metastatic (Stage IV) Breast Cancer

NCT05826964
View directory record Official record
Conditions
Breast Cancer, ER-positive Breast Cancer, HER2-negative Breast Cancer, Metastatic Breast Cancer
Interventions
AI+CDK4/6i, SERD+CDK4/6i, mTOR inhibitor + AI, mTOR inhibitor + SERD, mTOR inhibitor + Selective estrogen receptor modulator, PI3K inhibitor + SERD, PI3K inhibitor + AI, Chemotherapy, Oral SERD, PARPi, AKT inhibitor, Step 3 Arm 2
Drug · Other
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2029
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jan 13, 2026 · Synced Oct 5, 2026, 12:27 AM EDT
Completed Phase 3 Interventional Results available

A Study to Compare the Safety and Efficacy of an Aromatase Inhibitor in Combination With Lapatinib, Trastuzumab or Both for the Treatment of Hormone Receptor Positive, HER2+ Metastatic Breast Cancer

NCT01160211
View directory record Official record
Conditions
Neoplasms, Breast
Interventions
Lapatinib, Trastuzumab, Aromatase Inhibitor
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years and older · Female only
Enrollment
369 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2022
U.S. locations
4
States / cities
Hollywood, Florida • Augusta, Georgia • Germantown, Tennessee + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 7, 2025 · Synced Oct 5, 2026, 12:27 AM EDT
Not yet recruiting Phase 1Phase 2 Interventional

BRE-06: Study to Increase Tolerance to Aromatase Inhibitors for Patients With Early-Stage Hormone Receptor Positive Breast Cancer Who Developed Hypoactive Sexual Desire Disorder

NCT07596212
View directory record Official record
Conditions
Early-stage Breast Cancer, Hypoactive Sexual Desire Disorder, Hormone Receptor Positive Breast Carcinoma, Breast Cancer
Interventions
Aromatase Inhibitors, Bupropion, GnRH agonist
Drug
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
18 Years and older · Female only
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2031
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 24, 2026 · Synced Oct 5, 2026, 12:27 AM EDT
Recruiting Phase 1 Interventional

An Investigational Study of BG-75202 Alone and in Combination With Other Therapeutic Agents in Adults With Advanced Solid Tumors

NCT07222267
View directory record Official record
Conditions
Breast Cancer, Advanced Solid Tumor
Interventions
BG-75202, CDK4 Inhibitor, Estrogen Receptor Antagonist, Aromatase Inhibitor
Drug
Lead sponsor
BeOne Medicines
Industry
Eligibility
18 Years and older
Enrollment
86 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2037
U.S. locations
6
States / cities
Birmingham, Alabama • New Haven, Connecticut • St Louis, Missouri + 3 more
Source: ClinicalTrials.gov public record
Updated Sep 28, 2026 · Synced Oct 5, 2026, 12:27 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

Dovitinib Plus an Aromatase Inhibitor for Metastatic Breast Cancer

NCT01484041
View directory record Official record
Conditions
Breast Cancer
Interventions
Dovitinib, Aromatase Inhibitors
Drug
Lead sponsor
Georgetown University
Other
Eligibility
18 Years and older · Female only
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2017
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Feb 9, 2018 · Synced Oct 5, 2026, 12:27 AM EDT
Completed Phase 2 Interventional Results available

Study of MEDI-573 Plus Standard Endocrine Therapy for Women With Hormone-sensitive Metastatic Breast Cancer

NCT01446159
View directory record Official record
Conditions
Hormone-sensitive, HER-2 Negative Metastatic Breast Cancer
Interventions
MEDI-573, Aromatase Inhibitor
Drug
Lead sponsor
MedImmune LLC
Industry
Eligibility
18 Years to 99 Years · Female only
Enrollment
188 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2019
U.S. locations
34
States / cities
Scottsdale, Arizona • Bakersfield, California • Pleasant Hill, California + 28 more
Source: ClinicalTrials.gov public record
Updated Jun 2, 2020 · Synced Oct 5, 2026, 12:27 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 14, 2009 · Synced Oct 5, 2026, 12:27 AM EDT
Recruiting Not applicable Interventional

Acutherapy to Prevent Aromatase Inhibitor-Associated Arthralgias in Non-Hispanic Black Postmenopausal Women With Early-Stage Breast Cancer

NCT06534125
View directory record Official record
Conditions
Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, HER2-Negative Breast Carcinoma, Hormone Receptor-Positive Breast Carcinoma
Interventions
Acupressure Therapy, Acupuncture Therapy, Aromatase Inhibition Therapy, Discussion, Survey Administration
Procedure · Device · Drug + 1 more
Lead sponsor
Emory University
Other
Eligibility
18 Years and older · Female only
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
4
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 29, 2026 · Synced Oct 5, 2026, 12:27 AM EDT
Completed Phase 1Phase 2 Interventional Results available

A Dose Escalation/Expansion Study of Oral OP-1250 in Subjects With Advanced and/or Metastatic HR+, HER2- Breast Cancer

NCT04505826
View directory record Official record
Conditions
Hormone Receptor Positive Breast Carcinoma, HER2-negative Breast Cancer
Interventions
OP-1250
Drug
Lead sponsor
Olema Pharmaceuticals, Inc.
Industry
Eligibility
18 Years and older
Enrollment
153 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
15
States / cities
Los Angeles, California • Aurora, Colorado • Deerfield Beach, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated May 11, 2026 · Synced Oct 5, 2026, 12:27 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

Atezolizumab and Cobimetinib or Idasanutlin in Participants With Stage IV or Unresectable Recurrent Estrogen Receptor Positive Breast Cancer

NCT03566485
View directory record Official record
Conditions
Stage III Breast Cancer, Stage IIIA Breast Cancer, Stage IIIB Breast Cancer, Stage IIIC Breast Cancer, Stage IV Breast Cancer, Estrogen Receptor-positive, HER2/Neu Negative
Interventions
Atezolizumab, Cobimetinib, Idasanutlin
Drug
Lead sponsor
Vanderbilt-Ingram Cancer Center
Other
Eligibility
18 Years and older · Female only
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 11, 2021 · Synced Oct 5, 2026, 12:27 AM EDT
Active, not recruiting Phase 2 Interventional

Alpelisib (BYL719) in Combination With Continued Endocrine Therapy Following Progression on Endocrine Therapy in Hormone Receptor Positive, HER2 Negative, PIK3CA Mutant Metastatic Breast Cancer

NCT04762979
View directory record Official record
Conditions
Hormone Receptor Positive Breast Carcinoma, HER2-negative Breast Cancer, PIK3CA Mutant Metastatic Breast Cancer
Interventions
Alpelisib, Fulvestrant, Aromatase inhibitor
Drug
Lead sponsor
Marina N Sharifi
Other
Eligibility
18 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
4
States / cities
Chicago, Illinois • Omaha, Nebraska • Hershey, Pennsylvania + 1 more
Source: ClinicalTrials.gov public record
Updated Jan 2, 2026 · Synced Oct 5, 2026, 12:27 AM EDT
Recruiting Phase 2 Interventional

Molecular Analyses to Predict Pathways of Endocrine Resistance Following Short Term Neoadjuvant Endocrine Treatment in Patients With Hormone Receptor-Positive HER2-negative Breast Cancer

NCT06361940
View directory record Official record
Conditions
Breast Cancer
Interventions
Aromatase inhibitors or tamoxifen
Drug
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years and older · Female only
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 14, 2025 · Synced Oct 5, 2026, 12:27 AM EDT
Completed Phase 2 Interventional Results available

Paclitaxel, Cyclophosphamide & Doxorubicin, Autologous Dendritic Cells & Surgery in Stage II/III Breast Cancer (Women)

NCT00499083
View directory record Official record
Conditions
Breast Cancer
Interventions
therapeutic autologous dendritic cells, aromatase inhibition therapy, cyclophosphamide, doxorubicin hydrochloride, paclitaxel, tamoxifen citrate, gene expression analysis, protein expression analysis, reverse transcriptase-polymerase chain reaction, immunoenzyme technique, immunohistochemistry staining method, laboratory biomarker analysis, adjuvant therapy, biopsy, conventional surgery, neoadjuvant therapy, radiation therapy
Biological · Drug · Genetic + 3 more
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years to 120 Years · Female only
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
2
States / cities
Tampa, Florida • Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 29, 2023 · Synced Oct 5, 2026, 12:27 AM EDT
Recruiting Phase 1 Interventional

Phase 1 Study of OP-3136 in Advanced or Metastatic Solid Tumors

NCT06784193
View directory record Official record
Conditions
Advanced or Metastatic ER+ HER2- Breast Cancer (mBC), Advanced or Metastatic Non-Small Cell Lung Cancer (NSCLC), Advanced or Metastatic Castration-Resistant Prostate Cancer (mCRPC), Metastatic Breast Cancer, Fulvestrant, Palazestrant
Interventions
OP-3136, Fulvestrant, Palazestrant
Drug
Lead sponsor
Olema Pharmaceuticals, Inc.
Industry
Eligibility
18 Years and older
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
7
States / cities
Sarasota, Florida • New Orleans, Louisiana • Boston, Massachusetts + 4 more
Source: ClinicalTrials.gov public record
Updated Oct 10, 2025 · Synced Oct 5, 2026, 12:27 AM EDT
Not listed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Letrozole Treatment in Normal and GnRH Deficient Women

NCT00351416
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Letrozole, NAL-GLU GnRH antagonist
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2004
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 27, 2017 · Synced Oct 5, 2026, 12:27 AM EDT
Completed Phase 2 Interventional Results available

Elagolix for Fertility Enhancement Clinical Trial

NCT04039204
View directory record Official record
Conditions
Endometriosis, Unexplained Infertility
Interventions
Elagolix, Ortho Cyclen
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 42 Years · Female only
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 26, 2024 · Synced Oct 5, 2026, 12:27 AM EDT