Drug Pipeline

Letrozole Clinical Trials

Data updated daily from ClinicalTrials.gov — last refresh 2026-06-12
103
Active Studies
54
Recruiting
31
Phase 3
10
Top Sponsors
27
Changes, 30 Days
What Changed in the Last 30 Days
DetectedTrialChange
2026-06-12 NCT07604272
Reversing InGuinal Hernia Trial: The Evaluation of Sex Hormones to Reverse Inguinal…
Enrollment reduced: 75 -> 30 participants
2026-06-12 NCT07604272
Reversing InGuinal Hernia Trial: The Evaluation of Sex Hormones to Reverse Inguinal…
Trial arms changed: 3 -> 2
2026-06-12 NCT07391774
Testing Whether Hormone Therapy With Ribociclib is as Effective as Chemotherapy Followed…
Trial sites expanded: 14 -> 18 locations
2026-06-06 NCT01953588
Fulvestrant and/or Anastrozole in Treating Postmenopausal Patients With Stage II-III…
Primary endpoint(s) modified
2026-06-06 NCT07391774
Testing Whether Hormone Therapy With Ribociclib is as Effective as Chemotherapy Followed…
Recruitment opened
2026-06-06 NCT07391774
Testing Whether Hormone Therapy With Ribociclib is as Effective as Chemotherapy Followed…
Trial sites expanded: 0 -> 14 locations
2026-06-05 NCT07174336
A Study of Tersolisib (LY4064809/STX-478) With Other Anti-Cancer Treatments in…
Trial sites expanded: 324 -> 327 locations
2026-06-05 NCT05183828
Effect of HSD3B1 (1245C) Gene Mutation on Treatment of Stage I-III Breast Cancer
Trial terminated — check why_stopped for reason
2026-06-05 NCT05183828
Effect of HSD3B1 (1245C) Gene Mutation on Treatment of Stage I-III Breast Cancer
critical why stopped: null → "Study ended earlier than anticipated due to end of funding."
2026-06-05 NCT05183828
Effect of HSD3B1 (1245C) Gene Mutation on Treatment of Stage I-III Breast Cancer
date change Primary completion moved earlier: 2026-06-30 -> 2026-05-13
2026-06-05 NCT05183828
Effect of HSD3B1 (1245C) Gene Mutation on Treatment of Stage I-III Breast Cancer
date change Completion moved earlier: 2026-06-30 -> 2026-05-13
2026-06-04 NCT07492641
BGB-43395 Plus Letrozole Versus CDK4/6i Plus Letrozole for Patients With Advanced or…
Trial sites expanded: 4 -> 13 locations
2026-06-03 NCT05827081
Phase IIIb Study of Ribociclib + ET in Early Breast Cancer
Trial sites expanded: 207 -> 215 locations
2026-05-29 NCT04568616
Phase II Study of Neoadjuvant ArOMatase Inhibitor Therapy for ER+ Breast Cancer (NAOMI)
date change Primary completion pushed: 2025-04-02 -> 2028-04-02
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
2026-05-28 NCT07604571
Study of IEV407 as Single Agent or in Combination in Patients With Advanced HR+/HER2…
Recruitment opened
2026-05-23 NCT07492641
BGB-43395 Plus Letrozole Versus CDK4/6i Plus Letrozole for Patients With Advanced or…
Recruitment opened
2026-05-23 NCT07492641
BGB-43395 Plus Letrozole Versus CDK4/6i Plus Letrozole for Patients With Advanced or…
Trial sites expanded: 0 -> 4 locations
2026-05-21 NCT06143631
Prescription of Letrozole for Uterine Myoma
date change Primary completion pushed: 2027-06-30 -> 2027-09-06
2026-05-21 NCT06143631
Prescription of Letrozole for Uterine Myoma
date change Completion pushed: 2027-06-30 -> 2027-12-13
Showing 20 of 27 changes detected in the last 30 days.
New Trial Filings, Last 30 Days
First PostedTrialPhaseStatus
2026-06-03 NCT07624903 Letrozole Versus Methotrexate for Management of Undisturbed Ectopic Pregnancy Phase 2 Not Yet Recruiting
2026-06-01 NCT07616427 Fovinaciclib Plus Aromatase Inhibitors and Dual HER2 Blockade in a Response-Adapted… Phase 2 Recruiting
2026-06-01 NCT07616453 Efficacy and Safety of Culmerciclib Plus Aromatase Inhibitors in a Response-Adapted… Phase 2 Recruiting
2026-06-01 NCT07616973 Letrozole vs. Clomiphene Citrate Plus Tamoxifen for Ovulation Induction and Pregnancy… Phase 3 Active, Not Recruiting
2026-06-01 NCT07618923 Neoadjuvant Dalpiciclib + AI → SHR-A1811 for HR+/HER2-Low Breast Cancer Phase 2 Not Yet Recruiting
2026-05-22 NCT07604272 Reversing InGuinal Hernia Trial: The Evaluation of Sex Hormones to Reverse Inguinal… Phase 1 Not Yet Recruiting
2026-05-22 NCT07604571 Study of IEV407 as Single Agent or in Combination in Patients With Advanced HR+/HER2… Phase 1 Recruiting
2026-05-19 NCT07596212 BRE-06: Study to Increase Tolerance to Aromatase Inhibitors for Patients With Early-Stage… Phase 1/2 Not Yet Recruiting
2026-05-15 NCT07589075 Sodium-Glucose Co-Transporter-2 Inhibitors as Adjuvant Therapy With Letrozole in… Phase 4 Completed
Active Studies by Phase
Phase 4
2
Phase 3
31
Phase 2
44
Phase 1/2
9
Phase 1
10
Early Phase 1
1
Not specified
6
Active Trials — top 25 of 103
NCT IDTitleConditionStatus
Phase 4
NCT06143631 Prescription of Letrozole for Uterine Myoma Leiomyoma, Uterine Recruiting
NCT05161195 Roll-over Study to Allow Continued Access to Ribociclib Metastatic Breast Cancer Active, Not Recruiting
Phase 3
NCT06016738 OP-1250 (Palazestrant) vs. Standard of Care for the Treatment of ER+/HER2- Advanced… Breast Cancer Recruiting
NCT06072781 A Study of Avutometinib (VS-6766) + Defactinib (VS-6063) in Recurrent Low-Grade Serous… Low Grade Serous Ovarian Cancer Recruiting
NCT07400523 Ribociclib in Hormone Receptor-positive, HER2-negative Early Breast Cancer With Residual… Breast Cancer Recruiting
NCT05774951 A Study of Camizestrant in ER+/HER2- Early Breast Cancer After at Least 2 Years of… Breast Cancer, Early Breast Cancer Recruiting
NCT05586802 Sex Steroids Balance for Metabolic and Reproductive Health in Klinefelter Syndrome Klinefelter Syndrome Recruiting
NCT05512364 Elacestrant for Treating ER+/HER2- Breast Cancer Patients With ctDNA Relapse (TREAT ctDNA) ER-positive Breast Cancer Recruiting
NCT06380751 Saruparib (AZD5305) Plus Camizestrant Compared With CDK4/6 Inhibitor Plus Endocrine… Advanced Breast Cancer Recruiting
NCT07085767 Palazestrant in Combination With Ribociclib for the First-line Treatment of ER+/HER2… 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
NCT06790693 A Study Evaluating the Efficacy and Safety of Inavolisib Plus CDK4/6 Inhibitor and… Breast Cancer Recruiting
NCT07492641 BGB-43395 Plus Letrozole Versus CDK4/6i Plus Letrozole for Patients With Advanced or… HR+/HER2- Breast Cancer Recruiting
NCT03011684 Fertility Preservation Using Tamoxifen and Letrozole in Estrogen Sensitive Tumors Trial Infertility Recruiting
NCT07174336 A Study of Tersolisib (LY4064809/STX-478) With Other Anti-Cancer Treatments in… Breast Neoplasms Recruiting
NCT05827081 Phase IIIb Study of Ribociclib + ET in Early Breast Cancer Early Breast Cancer Recruiting
NCT07391774 Testing Whether Hormone Therapy With Ribociclib is as Effective as Chemotherapy Followed… Anatomic Stage II Breast Cancer AJCC v8 Recruiting
NCT02246621 A Study of Nonsteroidal Aromatase Inhibitors Plus Abemaciclib (LY2835219) in… Breast Cancer Active, Not Recruiting
NCT02763566 A Study of Abemaciclib (LY2835219) in Participants With 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
NCT05909397 Vepdegestrant (ARV-471/PF-07850327) + Palbociclib vs Letrozole + Palbociclib in… Breast Cancer Active, Not Recruiting
NCT02947685 Randomized, Open Label, Clinical Study of the Targeted Therapy, Palbociclib, to Treat… HER-2 Positive Breast Cancer Active, Not Recruiting
NCT04095364 Letrozole With or Without Paclitaxel and Carboplatin in Treating Patients With Stage… Low Grade Fallopian Tube Serous Adenocarcinoma Active, Not Recruiting
NCT05514054 A Study of Imlunestrant Versus Standard Endocrine Therapy in Participants With Early… Breast Neoplasms Active, Not Recruiting
Sponsors Running Letrozole Trials
Disease Areas
Get alerts when Letrozole trials change
Status changes, date slips, and new filings — detected daily, delivered to your inbox.
Start monitoring free