Drug Pipeline

Tamoxifen Clinical Trials

Data updated daily from ClinicalTrials.gov — last refresh 2026-06-12
40
Active Studies
20
Recruiting
13
Phase 3
10
Top Sponsors
3
Changes, 30 Days
What Changed in the Last 30 Days
DetectedTrialChange
2026-05-28 NCT06492616
A Study of Elacestrant Versus Standard Endocrine Therapy in Women and Men With ER+,HER2…
Trial sites expanded: 536 -> 541 locations
2026-05-23 NCT07287098
A Study of Imlunestrant (LY3484356) in Premenopausal Women With Estrogen…
Trial sites expanded: 42 -> 60 locations
2026-05-14 NCT06979596
A Study of MK-5684 in People With Certain Solid Tumors (MK-5684-015/OMAHA-015)
Trial sites expanded: 52 -> 55 locations
Active Studies by Phase
Phase 4
1
Phase 3
13
Phase 2
21
Phase 1/2
1
Phase 1
3
Early Phase 1
1
Active Trials — top 25 of 40
NCT IDTitleConditionStatus
Phase 4
NCT05161195 Roll-over Study to Allow Continued Access to Ribociclib Metastatic Breast Cancer Active, Not Recruiting
Phase 3
NCT05774951 A Study of Camizestrant in ER+/HER2- Early Breast Cancer After at Least 2 Years of… Breast Cancer, Early Breast Cancer Recruiting
NCT05512364 Elacestrant for Treating ER+/HER2- Breast Cancer Patients With ctDNA Relapse (TREAT ctDNA) ER-positive Breast Cancer Recruiting
NCT06492616 A Study of Elacestrant Versus Standard Endocrine Therapy in Women and Men With ER+,HER2… Breast Cancer Recruiting
NCT05952557 An Adjuvant Endocrine-based Therapy Study of Camizestrant (AZD9833) in ER+/HER2- Early… Breast Cancer, Early Breast Cancer Recruiting
NCT03011684 Fertility Preservation Using Tamoxifen and Letrozole in Estrogen Sensitive Tumors Trial Infertility Recruiting
NCT05645536 Safety Extension Study for Subjects With HR+, HER2- Breast Cancer for Subjects Who Have… Breast Cancer Enrolling by Invitation
NCT04906395 Ovarian Suppression Evaluating Subcutaneous Leuprolide Acetate in Breast Cancer Breast Cancer Active, Not Recruiting
NCT01674140 S1207 Hormone Therapy With or Without Everolimus in Treating Patients With Breast Cancer Breast Cancer Active, Not Recruiting
NCT05514054 A Study of Imlunestrant Versus Standard Endocrine Therapy in Participants With Early… Breast Neoplasms Active, Not Recruiting
NCT06440967 A Study to Confirm if Fezolinetant Helps Reduce Hot Flashes in Women With Breast Cancer… Hot Flashes Active, Not Recruiting
NCT05306340 A Study Evaluating the Efficacy and Safety of Giredestrant Plus Everolimus Compared With… Estrogen Receptor (ER)-Positive, HER2-negative, Locally Advanced or Metastatic Breast Cancer Active, Not Recruiting
NCT00310180 Hormone Therapy With or Without Combination Chemotherapy in Treating Women Who Have… Breast Adenocarcinoma Active, Not Recruiting
NCT01272037 Tamoxifen Citrate, Letrozole, Anastrozole, or Exemestane With or Without Chemotherapy in… Breast Ductal Carcinoma In Situ Active, Not Recruiting
Phase 2
NCT06348134 Assessing the Efficacy and Safety of Anti-HER2 Therapy in Nigerian Women With HER2+… Human Epidermal Growth Factor 2 Negative Carcinoma of Breast Recruiting
NCT06179303 Functional Imaging in Prediction of Response to Abemaciclib for Advanced Hormone… Anatomic Stage III Breast Cancer AJCC v8 Recruiting
NCT05982093 Elacestrant With/Without Triptorelin in Premenopausal Women With Luminal Breast Cancer Breast Cancer Recruiting
NCT06434064 Tamoxifen and Pegylated Liposomal Doxorubicin for the Treatment of Patients With… Anatomic Stage III Breast Cancer AJCC v8 Recruiting
NCT05501704 ETHAN - ET for Male BC Male Breast Cancer Recruiting
NCT05941520 Acolbifene Versus Low Dose Tamoxifen for the Prevention of Breast Cancer in Premenopausal… Breast Atypical Hyperplasia Recruiting
NCT06184750 Finding the Best Tamoxifen Dose for Breast Cancer Risk Reduction in Premenopausal Women… Breast Atypical Ductal Hyperplasia Recruiting
NCT06979596 A Study of MK-5684 in People With Certain Solid Tumors (MK-5684-015/OMAHA-015) Malignant Neoplasm Recruiting
NCT06195306 Low Dose Tamoxifen With or Without Omega-3 Fatty Acids for Breast Cancer Risk Reduction Breast Atypical Hyperplasia Recruiting
NCT06075953 DCIS: RECAST Trial Ductal Carcinoma In Situ: Re-Evaluating Conditions for Active… Ductal Carcinoma in Situ Recruiting
NCT05035836 A Phase 2 Single-Arm Open-Label Pilot Trial Evaluating Zanidatamab (ZW25) in Patients… Breast Cancer Recruiting
Sponsors Running Tamoxifen Trials
Disease Areas
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