Drug or intervention
Letrozole Clinical Trials
Studies that test Letrozole, alone, with other treatments or as the comparison.
In numbers
Open to volunteers: recruiting, not yet recruiting or enrolling by invitation. Active adds studies under way that have stopped recruiting.
Open to volunteers
All 123Breast Cancer
Safety Extension Study for Subjects With HR+, HER2- Breast Cancer for Subjects Who Have Completed the OVELIA Study
TOL2506A (OVELIA) is a Phase 3, single arm, open-label study evaluating the effectiveness of TOL2506 in suppressing ovarian function in premenopausal women with HR+, HER2-negative breast cancer and men with HR+ breast cancer.
- Trial name
- NCT05645536
- Testing
- TOL2506, Tamoxifen, Letrozole tablets
- Where
- 46 sites in United States, Argentina and 4 more
- Volunteers
- 250 people
- Sponsor
- Tolmar Inc.
Low-Grade Serous Ovarian Cancer
A Study of Avutometinib, Defactinib, and Letrozole in People With Low-Grade Serous Ovarian Cancer
The researchers are doing this study to find out whether the combination of avutometinib, defactinib, and letrozole is an effective treatment for people with low-grade serous ovarian cancer (LGSOC).
- Trial name
- CHAMELEON (NCT06394804)
- Testing
- Avutometinib, Defactinib, Letrozole
- Where
- 8 sites in United States
- Volunteers
- 20 people
- Sponsor
- Memorial Sloan Kettering Cancer Center
Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage IIIA Breast Cancer AJCC v8
Testing Whether Hormone Therapy With Ribociclib is as Effective as Chemotherapy Followed by Hormone Therapy With Ribociclib for the Treatment of High Anatomic Stage Breast Cancer With Low Recurrence Risk, The RxFINE-Low Trial
This phase III trial compares standard of care hormone therapy plus ribociclib to chemotherapy followed by hormone therapy plus ribociclib for the treatment of patients with high anatomic stage breast cancer with low risk of the…
- Conditions
- Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage IIIA Breast Cancer AJCC v8, Anatomic Stage IIIC Breast Cancer AJCC v8, Estrogen Receptor-Positive Breast Carcinoma
- Trial name
- NCT07391774
- Testing
- Anastrozole, Biospecimen Collection, Bone Scan
- Where
- 223 sites in United States, Puerto Rico
- Volunteers
- 1,978 people
- Sponsor
- National Cancer Institute (NCI)
Advanced Unresectable or Metastatic Breast Cancer, Advanced Solid Tumors
A Trial of HRS-6209 in Combination With Other Antitumor Therapies in Breast Cancer Patients or HRS-9813 as Monotherapy in Patients With Advanced Solid Tumors
The study is being conducted to evaluate the safety, PK and efficacy of HRS-6209 in Combination with Fulvestrant, Letrozole, HRS-8080, HRS-1358 ,or HRS-9813 and HRS-8080，or letrozole and trastuzumab, with or without pertuzumab…
- Trial name
- NCT06555068
- Testing
- HRS-6209 in Combination with Fulvestrant, HRS-6209 in Combination with HRS-1358, HRS-6209 in Combination with Letrozole
- Where
- China
- Volunteers
- 528 people
- Sponsor
- Jiangsu HengRui Medicine Co., Ltd.
Liposarcoma, Prostate Cancer
Study to Test the Safety and Tolerability of PF-07220060 in Participants With Advance Solid Tumors
This is a Phase 1/2A, open label, multicenter, nonrandomized, multiple dose, safety, tolerability, pharmacokinetic and pharmacodynamic study of PF-07220060 administered as a single agent and in combination with endocrine therapy.
- Conditions
- Liposarcoma, Prostate Cancer, Advanced Breast Cancer, NSCLC (Non-small Cell Lung Cancer)
- Trial name
- CDK4i (NCT04557449)
- Testing
- PF-07220060, Letrozole, Fulvestrant
- Where
- 39 sites in United States, Argentina and 6 more
- Volunteers
- 430 people
- Sponsor
- Pfizer
Locally Advanced or Metastatic ER+ HER2- Breast Cancer, Locally Advanced or Metastatic Castration-resistant Prostate Cancer
Study of PF-07248144 in Advanced or Metastatic Solid Tumors
This is an open-label, multi center study to evaluate safety, tolerability, pharmacokinetics (PK), and pharmacodynamics (PD) of PF-07248144 and early signs of clinical efficacy of PF-07248144 as a single agent and in combination…
- Conditions
- Locally Advanced or Metastatic ER+ HER2- Breast Cancer, Locally Advanced or Metastatic Castration-resistant Prostate Cancer, Locally Advanced or Metastatic Non-small Cell Lung Cancer
- Trial name
- KAT6 (NCT04606446)
- Testing
- PF-07248144, Fulvestrant, Letrozole
- Where
- 43 sites in United States, Australia and 3 more
- Volunteers
- 320 people
- Sponsor
- Pfizer
Advanced HR+/HER2- Breast Cancer
Study of IEV407 as Single Agent or in Combination in Patients With Advanced HR+/HER2- Breast Cancer
The purpose of this study is to evaluate the safety, tolerability and preliminary activity of IEV407 as a single agent and in combination with endocrine therapy (fulvestrant or letrozole) in patients with advanced hormone…
- Trial name
- NCT07604571
- Testing
- IEV407, Fulvestrant, Letrozole
- Where
- 10 sites in United States, Canada and 5 more
- Volunteers
- 194 people
- Sponsor
- Novartis Pharmaceuticals
Ductal Carcinoma in Situ
Prototype DAA/TAA Vaccine Targeting MUC1 for Immune Interception and Prevention in Ductal Carcinoma In Situ
Women with biopsy-proven ductal carcinoma in situ (DCIS) will be enrolled into two cohorts. One cohort will receive neoadjuvant therapy with an aromatase inhibitor or selective estrogen receptor modulator (SERM) for about 12…
- Trial name
- NCT06218303
- Testing
- MUC1 Peptide Vaccine, Hiltonol®, Aromatase Inhibitor
- Where
- United States
- Volunteers
- 50 people
- Sponsor
- Finn, Olivera, PhD
HR+/HER2- Breast Cancer
BGB-43395 Plus Letrozole Versus CDK4/6i Plus Letrozole for Patients With Advanced or Metastatic HR+/HER2- Breast Cancer Who Have Not Received Prior Treatment for Advanced or Metastatic Disease
The purpose of this study is to investigate the efficacy and safety of BGB-43395 in combination with letrozole compared with investigator's choice of cyclin-dependent kinase 4/6 inhibitor (CDK4/6i) in combination with letrozole…
- Trial name
- KANDELA-302 (NCT07492641)
- Testing
- BGB-43395, Letrozole, Abemaciclib
- Where
- 206 sites in United States, Australia and 14 more
- Volunteers
- 1,056 people
- Sponsor
- BeOne Medicines
Advanced Solid Tumor, Advanced Breast Cancer
BGB-43395 Alone or as Part of Combination Therapies in Participants With Breast Cancer and Other Advanced Solid Tumors
This is a dose escalation and dose expansion study to compare how well BGB-43395, a selective cyclin-dependent kinase 4 (CDK4) inhibitor, works as monotherapy or in combination with fulvestrant, letrozole, or elacestrant in…
- Conditions
- Advanced Solid Tumor, Advanced Breast Cancer, Metastatic Breast Cancer, Hormone-receptor-positive Breast Cancer
- Trial name
- NCT06120283
- Testing
- BGB-43395, Fulvestrant, Letrozole
- Where
- 61 sites in United States, Australia and 9 more
- Volunteers
- 433 people
- Sponsor
- BeOne Medicines
Completed, with results posted
All –Breast Cancer
Letrozole in Preventing Cancer in Postmenopausal Women Who Have Received 4-6 Years of Hormone Therapy for Hormone Receptor-Positive, Lymph Node-Positive, Early-Stage Breast Cancer
RATIONALE: Estrogen can cause the growth of breast cancer cells. Letrozole may fight breast cancer by lowering the amount of estrogen the body makes.
- Trial name
- SOLE (NCT00553410)
- Testing
- Letrozole
- Where
- 164 sites in United States, Australia and 18 more
- Volunteers
- 4,884 people
- Sponsor
- ETOP IBCSG Partners Foundation
Breast Cancer, Estrogen Receptor Positive Tumor
To Reduce the Use of Chemotherapy in Postmenopausal Patients With ER-positive and HER2-positive Breast Cancer (TOUCH)
This is a phase II open-label, multicentre, randomized trial. The study assesses the treatment of postmenopausal patients with hormone receptor positive/HER2 positive early breast cancer with neoadjuvant palbociclib in…
- Conditions
- Breast Cancer, Estrogen Receptor Positive Tumor, HER2-positive Breast Cancer
- Trial name
- TOUCH (NCT03644186)
- Testing
- Paclitaxel, Trastuzumab, Pertuzumab
- Where
- 54 sites in Belgium, France and 2 more
- Volunteers
- 147 people
- Sponsor
- ETOP IBCSG Partners Foundation
Advanced Breast Carcinoma, HER2-Positive Breast Carcinoma
TVB-2640 and Trastuzumab With Paclitaxel or Endocrine Therapy for Treatment of HER2 Positive Metastatic Breast Cancer
This phase II trial studies how well FASN inhibitor TVB-2640, paclitaxel, and trastuzumab work in treating patients with HER2 positive breast cancer that has spread to other places in the body (metastatic).
- Conditions
- Advanced Breast Carcinoma, HER2-Positive Breast Carcinoma, Anatomic Stage III Breast Cancer AJCC v8, Anatomic Stage IV Breast Cancer AJCC v8
- Trial name
- NCT03179904
- Testing
- Anastrozole, Denifanstat, Exemestane
- Where
- 3 sites in United States
- Volunteers
- 17 people
- Sponsor
- Mayo Clinic
Estrogen Receptor-positive Breast Cancer, HER2/Neu Negative
Testing the Effects of Palbociclib and Fulvestrant or Letrozole for Patients 70 Years of Age of Older With Metastatic Breast Cancer
This phase II trial studies the side effects and how well palbociclib and letrozole or fulvestrant works in treating patients aged 70 years and older with estrogen receptor positive, HER2 negative breast cancer that has spread to…
- Conditions
- Estrogen Receptor-positive Breast Cancer, HER2/Neu Negative, Stage IV Breast Cancer AJCC v6 and v7
- Trial name
- NCT03633331
- Testing
- Palbociclib, Letrozole, Fulvestrant
- Where
- 447 sites in United States
- Volunteers
- 93 people
- Sponsor
- Alliance for Clinical Trials in Oncology
Metastatic Breast Cancer
ER Reactivation Therapy for Breast Cancer
Before anti-estrogens such as tamoxifen were developed to treat estrogen receptor (ER)-positive breast cancer, high-dose estrogen therapies were used.
- Trial name
- POLLY (NCT02188745)
- Testing
- 17B-estradiol, Letrozole, Anastrozole
- Where
- 3 sites in United States
- Volunteers
- 20 people
- Sponsor
- Dartmouth-Hitchcock Medical Center