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ClinicalTrials.gov public records Last synced Sep 18, 2026, 6:14 PM EDT

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Showing 1–19 of 19 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: letrozole plus leuprolide Clear all
Active, not recruiting Phase 2 Interventional

A Study Evaluating the Efficacy and Safety of Biomarker-Driven Therapies in Patients With Persistent or Recurrent Rare Epithelial Ovarian Tumors

NCT04931342
View directory record Official record
Conditions
Ovarian Cancer
Interventions
Ipatasertib, Cobimetinib, Trastuzumab Emtansine, Atezolizumab, Bevacizumab, Paclitaxel, Giredestrant, Abemaciclib, Inavolisib, Palbociclib, Letrozole, Olaparib, Luteinizing Hormone-Releasing Hormone (LHRH) Agonists, Cyclophosphamide
Drug
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
18 Years and older · Female only
Enrollment
176 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2028
U.S. locations
8
States / cities
San Francisco, California • St Louis, Missouri • Charlotte, North Carolina + 5 more
Source: ClinicalTrials.gov public record
Updated Sep 9, 2026 · Synced Sep 18, 2026, 6:14 PM EDT
Completed Phase 2 Interventional Results available

Study Assessing the Efficacy and Safety of Alpelisib Plus Fulvestrant or Letrozole, Based on Prior Endocrine Therapy, in Patients With PIK3CA Mutant, HR+, HER2- Advanced Breast Cancer Who Have Progressed on or After Prior Treatments

NCT03056755
View directory record Official record
Conditions
Breast Cancer
Interventions
Alpelisib, Fulvestrant, Letrozole, Goserelin, Leuprolide
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years to 99 Years
Enrollment
383 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2024
U.S. locations
25
States / cities
Gilbert, Arizona • Phoenix, Arizona • Anaheim, California + 20 more
Source: ClinicalTrials.gov public record
Updated Jan 12, 2026 · Synced Sep 18, 2026, 6:14 PM EDT
Active, not recruiting Phase 2 Interventional

Neoadjuvant Endocrine Therapy, Palbociclib, Avelumab in Estrogen Receptor Positive Breast Cancer

NCT03573648
View directory record Official record
Conditions
Breast Cancer
Interventions
Avelumab, Endocrine therapy, Palbociclib
Drug
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Other
Eligibility
18 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2026
U.S. locations
4
States / cities
Birmingham, Alabama • Washington D.C., District of Columbia • Baltimore, Maryland + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 18, 2026 · Synced Sep 18, 2026, 6:14 PM EDT
Recruiting Phase 3 Interventional

Phase IIIb Study of Ribociclib + ET in Early Breast Cancer

NCT05827081
View directory record Official record
Conditions
Early Breast Cancer
Interventions
Ribociclib, Letrozole, Ansastrozole, Goserelin, Leuprolide, Exemestane
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years to 100 Years
Enrollment
1,400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2030
U.S. locations
85
States / cities
Birmingham, Alabama • Anchorage, Alaska • Goodyear, Arizona + 74 more
Source: ClinicalTrials.gov public record
Updated Sep 17, 2026 · Synced Sep 18, 2026, 6:14 PM EDT
Terminated Phase 4 Interventional Results available

Pharmacokinetics and Pharmacogenomics of Ribociclib in Race-based Cohorts

NCT04657679
View directory record Official record
Conditions
Breast Cancer
Interventions
Ribociclib
Drug
Lead sponsor
Georgetown University
Other
Eligibility
18 Years and older · Female only
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
3
States / cities
Washington D.C., District of Columbia • Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 25, 2024 · Synced Sep 18, 2026, 6:14 PM EDT
Terminated Phase 2 Interventional

Letrozole and Goserelin or Leuprolide in Treating Premenopausal Estrogen Receptor-Positive Patients With Stage IV Breast Cancer

NCT00498901
View directory record Official record
Conditions
Breast Cancer
Interventions
goserelin, letrozole, leuprolide acetate, conventional surgery
Drug · Procedure
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older · Female only
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
2
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 8, 2013 · Synced Sep 18, 2026, 6:14 PM EDT
Completed Phase 2 Interventional Results available

Study of (1) Everolimus, (2) Estrogen Deprivation Therapy (EDT) With Leuprolide + Letrozole and (3) Everolimus + EDT in Patients With Unresectable Fibrolamellar Hepatocellular Carcinoma (FLL-HCC)

NCT01642186
View directory record Official record
Conditions
Fibrolamellar Carcinoma, Fibrolamellar Liver Cancer
Interventions
everolimus, letrozole plus leuprolide, combination of everolimus, letrozole and leuprolide
Drug
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
12 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2021
U.S. locations
6
States / cities
San Francisco, California • Baltimore, Maryland • Boston, Massachusetts + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 28, 2022 · Synced Sep 18, 2026, 6:14 PM EDT
Active, not recruiting Phase 3 Interventional

A Study Evaluating the Efficacy and Safety of Adjuvant Giredestrant Compared With Physician's Choice of Adjuvant Endocrine Monotherapy in Participants With Estrogen Receptor-Positive, HER2-Negative Early Breast Cancer (lidERA Breast Cancer)

NCT04961996
View directory record Official record
Conditions
Early Breast Cancer
Interventions
Giredestrant, Physician's Choice of Endocrine Therapy, LHRH Agonist
Drug
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
18 Years and older
Enrollment
4,170 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2033
U.S. locations
72
States / cities
Daphne, Alabama • Bakersfield, California • Fullerton, California + 66 more
Source: ClinicalTrials.gov public record
Updated Jun 16, 2026 · Synced Sep 18, 2026, 6:14 PM EDT
Completed Phase 3 Interventional Results available

Three Drug Combination Therapy Versus Conventional Treatment of Children With Congenital Adrenal Hyperplasia

NCT00001521
View directory record Official record
Conditions
Congenital Adrenal Hyperplasia (CAH)
Interventions
Fludrocortisone, Hydrocortisone, Letrozole, Flutamide, Testolactone
Drug
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
2 Years to 18 Years
Enrollment
66 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1995 – 2024
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 11, 2025 · Synced Sep 18, 2026, 6:14 PM EDT
Active, not recruiting Phase 3 Interventional Results available

S1207 Hormone Therapy With or Without Everolimus in Treating Patients With Breast Cancer

NCT01674140
View directory record Official record
Conditions
Breast Cancer
Interventions
anastrozole, everolimus, exemestane, goserelin acetate, letrozole, leuprolide acetate, tamoxifen citrate, placebo
Drug · Other
Lead sponsor
SWOG Cancer Research Network
Network
Eligibility
18 Years and older
Enrollment
1,939 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2030
U.S. locations
1455
States / cities
Birmingham, Alabama • Anchorage, Alaska • Fairbanks, Alaska + 887 more
Source: ClinicalTrials.gov public record
Updated Feb 9, 2026 · Synced Sep 18, 2026, 6:14 PM EDT
Active, not recruiting Phase 2 Interventional

A Single Arm Phase II Study of ADjuvant Endocrine Therapy, Pertuzumab, and Trastuzumab for Patients With Anatomic Stage I Hormone Receptor-positive, HER2-positive Breast Cancer

NCT04569747
View directory record Official record
Conditions
HER2-positive Breast Cancer, Invasive Carcinoma of the Breast, Breast Cancer, Node Negative Breast Cancer, Micrometastasis Breast Cancer, Hormone Receptor Positive Breast Cancer
Interventions
Pertuzumab+TRASTUZUMAB, ADJUVANT ENDOCRINE THERAPY
Combination Product · Drug
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
393 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2030
U.S. locations
32
States / cities
Stamford, Connecticut • Miami, Florida • Atlanta, Georgia + 20 more
Source: ClinicalTrials.gov public record
Updated Apr 1, 2026 · Synced Sep 18, 2026, 6:14 PM EDT
Withdrawn Phase 4 Interventional Accepts healthy volunteers

Does Letrozole Improve the Outcomes and/or Reduce the Cost of IVF-ET Cycles?

NCT00804960
View directory record Official record
Conditions
Infertility
Interventions
Letrozole, Std IVF Protocol
Drug
Lead sponsor
Center for Human Reproduction
Other
Eligibility
21 Years to 38 Years · Female only
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 24, 2015 · Synced Sep 18, 2026, 6:14 PM EDT
Not listed Phase 2 Interventional

NEOADjuvant Aromatase Inhibitor and Pertuzumab/Trastuzumab for Women With Breast Cancer

NCT02689921
View directory record Official record
Conditions
Breast Neoplasms
Interventions
Exemestane, Letrozole, Anastrozole, Leuprolide Acetate, Pertuzumab, Trastuzumab
Drug
Lead sponsor
Midwestern Regional Medical Center
Other
Eligibility
18 Years and older
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
2
States / cities
Newnan, Georgia • Zion, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 27, 2018 · Synced Sep 18, 2026, 6:14 PM EDT
Recruiting Phase 2 Interventional

A Study of Avutometinib, Defactinib, and Letrozole in People With Low-Grade Serous Ovarian Cancer

NCT06394804
View directory record Official record
Conditions
Low-Grade Serous Ovarian Cancer
Interventions
Avutometinib, Defactinib, Letrozole
Drug
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older · Female only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
8
States / cities
Atlanta, Georgia • Basking Ridge, New Jersey • Middletown, New Jersey + 5 more
Source: ClinicalTrials.gov public record
Updated Jul 19, 2026 · Synced Sep 18, 2026, 6:14 PM EDT
Completed Phase 3 Interventional Results available

Study to Assess the Safety and Efficacy of Ribociclib (LEE011) in Combination With Letrozole for the Treatment of Men and Pre/Postmenopausal Women With HR+ HER2- aBC

NCT02941926
View directory record Official record
Conditions
Breast Cancer
Interventions
Ribociclib, Letrozole, Goserelin, Leuprolide
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
3,246 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2022
U.S. locations
71
States / cities
Anchorage, Alaska • Chandler, Arizona • Phoenix, Arizona + 66 more
Source: ClinicalTrials.gov public record
Updated Oct 23, 2023 · Synced Sep 18, 2026, 6:14 PM EDT
Completed Phase 2 Interventional Results available

Extended Endocrine Therapy for Premenopausal Women With Breast Cancer

NCT00903162
View directory record Official record
Conditions
Breast Cancer
Interventions
leuprolide, letrozole, zoledronic acid
Drug
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
18 Years and older · Female only
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
4
States / cities
Denver, Colorado • Boston, Massachusetts • Newton, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 17, 2016 · Synced Sep 18, 2026, 6:14 PM 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 23, 2026 · Synced Sep 18, 2026, 6:14 PM EDT
Active, not recruiting Phase 3 Interventional

Ovarian Suppression Evaluating Subcutaneous Leuprolide Acetate in Breast Cancer

NCT04906395
View directory record Official record
Conditions
Breast Cancer
Interventions
TOL2506, Tamoxifen, Letrozole Tablets, Anastrozole Tablets, Exemestane Tablets
Drug
Lead sponsor
Tolmar Inc.
Industry
Eligibility
18 Years to 49 Years
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
17
States / cities
Greenbrae, California • Parker, Colorado • Chicago, Illinois + 14 more
Source: ClinicalTrials.gov public record
Updated Jan 12, 2026 · Synced Sep 18, 2026, 6:14 PM EDT
Enrolling by invitation Phase 3 Interventional

Safety Extension Study for Subjects With HR+, HER2- Breast Cancer for Subjects Who Have Completed the OVELIA Study

NCT05645536
View directory record Official record
Conditions
Breast Cancer
Interventions
TOL2506, Tamoxifen, Letrozole tablets, Anastrozole Tablets, Exemestane Tablets
Drug
Lead sponsor
Tolmar Inc.
Industry
Eligibility
18 Years to 51 Years
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2030
U.S. locations
17
States / cities
Greenbrae, California • Fort Lauderdale, Florida • Lexington, Kentucky + 14 more
Source: ClinicalTrials.gov public record
Updated Aug 31, 2026 · Synced Sep 18, 2026, 6:14 PM EDT