Therapy Detail

Therapy Name Letrozole
Therapy Description

Femara (letrozole) is an aromatase inhibitor, which inhibits estrogen synthesis (NCI Drug Dictionary). Femara (letrozole) is approved for postmenopausal women with hormone receptor positive breast cancer (


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Drug Name Trade Name Synonyms Drug Classes Drug Description
Letrozole Femara Letrozol Aromatase Inhibitor 3 Femara (letrozole) is an aromatase inhibitor, which inhibits estrogen synthesis (NCI Drug Dictionary). Femara (letrozole) is approved for postmenopausal women with hormone receptor positive breast cancer (
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
Clinical Trial Phase Therapies Title Recruitment Status
NCT00461773 Phase II Letrozole Bevacizumab Randomized Phase II Study of Preoperative Letrozole (Femara) in Combination With Avastin in Hormone Receptor Positive Breast Cancer Unknown status
NCT01272037 Phase III Anastrozole Letrozole Tamoxifen Exemestane Tamoxifen Citrate, Letrozole, Anastrozole, or Exemestane With or Without Chemotherapy in Treating Patients With Invasive RxPONDER Breast Cancer Active, not recruiting
NCT01923168 Phase II Buparlisib + Letrozole Letrozole Alpelisib + Letrozole Study of Letrozole With or Without BYL719 or Buparlisib, for the Neoadjuvant Treatment of Postmenopausal Women Completed
NCT02095184 Phase 0 Anastrozole Letrozole GCC 1366 Anti-Proliferative Response to NeoAdjuvant AIs in Overweight and Obese Patients Recruiting
NCT02040857 Phase II Exemestane Palbociclib Tamoxifen Letrozole Anastrozole Palbociclib + Endocrine Therapy for HR + BrCa Active, not recruiting
NCT02188745 Phase II Exemestane Estradiol Anastrozole Letrozole ER Reactivation Therapy for Breast Cancer (POLLY) Recruiting
NCT01035099 Phase I Letrozole RCT of Fixed vs Titrated Letrozole in Breast Cancer Patient Undergoing IVF Recruiting
NCT00651976 Phase I Letrozole Letrozole in Treating Postmenopausal Women With Stage I, II or III Breast Cancer That Can Be Removed by Surgery Terminated
NCT03219476 Phase II Anastrozole Letrozole Tamoxifen Exemestane Neoadjuvant Endocrine Therapy in Hormone Receptor-Positive HERNegative Node-Negative Breast Cancer Patients to Assess Responses and Mechanisms of Endocrine Resistance Recruiting
NCT01296555 Phase I Fulvestrant Taselisib Letrozole A Dose Escalation Study Evaluating the Safety and Tolerability of GDC-0032 in Patients With Locally Advanced or Metastatic Solid Tumors And in Combination With Endocrine Therapy in Patients With Locally Advanced or Metastatic Hormone Receptor-Positive Breast Cancer Active, not recruiting
NCT01491737 Phase II Anastrozole Letrozole Trastuzumab Pertuzumab + Trastuzumab A Study of Pertuzumab in Combination With Trastuzumab Plus an Aromatase Inhibitor in Participants With Metastatic Human Epidermal Growth Factor Receptor 2 (HER2)-Positive and Hormone Receptor-Positive Advanced Breast Cancer (PERTAIN) Active, not recruiting
NCT01797523 Phase II Letrozole Everolimus Metformin RAD/Letrozole/Metformin Active, not recruiting
NCT02684032 Phase I Letrozole Fulvestrant Gedatolisib + Palbociclib A Study To Assess The Tolerability And Clinical Activity Of Gedatolisib In Combination With Palbociclib/Letrozole Or Palbociclib/Fulvestrant In Women With Metastatic Breast Cancer Recruiting
NCT02947685 Phase III Fulvestrant Pertuzumab Letrozole Anastrozole Exemestane Trastuzumab Randomized, Open Label, Clinical Study of the Targeted Therapy, Palbociclib, to Treat Metastatic Breast Cancer (PATINA) Recruiting
NCT01674140 Phase III Goserelin Anastrozole Letrozole Leuprolide Everolimus Tamoxifen Exemestane S1207 Hormone Therapy With or Without Everolimus in Treating Patients With Breast Cancer Recruiting
NCT01958021 Phase III Letrozole + Ribociclib Letrozole Study of Efficacy and Safety of LEE011 in Postmenopausal Women With Advanced Breast Cancer.(MONALEESA-2) (MONALEESA-2) Active, not recruiting
NCT02010021 Phase I Letrozole Presurgical Treatment With Letrozole in Patients With Early-stage Breast Cancer. Completed
NCT02753686 Phase I Tamoxifen Exemestane Fulvestrant Letrozole Anastrozole Everolimus + Exemestane Treatment of Canadian Postmenopausal Women With ER+ Advanced Breast Cancer in the Real-World Setting With Hormone Therapy ± Targeted Therapy (Treat ER+ight) Recruiting
NCT03122197 Phase I Letrozole Study of Letrozole in Recurrent Gliomas Recruiting
NCT02296801 Phase II Palbociclib Letrozole A Phase II Randomized Study Evaluating the Biological and Clinical Effects of the Combination of Palbociclib With Letrozole as Neoadjuvant Therapy in Post-Menopausal Women With Estrogen-Receptor Positive Primary Breast Cancer Active, not recruiting
NCT02269670 Phase II Tamoxifen Everolimus Megestrol acetate Letrozole Fulvestrant Anastrozole Phase II Study of Everolimus Beyond Progression Active, not recruiting
NCT02278120 Phase III Goserelin + Ribociclib Tamoxifen Letrozole Goserelin Anastrozole Study of Efficacy and Safety in Premenopausal Women With Hormone Receptor Positive, HER2-negative Advanced Breast Cancer (MONALEESA-7) Active, not recruiting
NCT02619669 Phase I Sapanisertib Letrozole Neoadjuvant Run-In Study With TAK-228 (MLN0128) Followed by Letrozole/TAK-228 (MLN0128) in Women With High-Risk ER+/HER2- Breast Cancer Recruiting
NCT03238703 FDA approved Tamoxifen Exemestane Toremifene Anastrozole Letrozole Endocrine Therapy in Treating Patients With HER2 Negative, Low Risk Breast Cancer Withdrawn
NCT01669343 Phase I Letrozole Aromatase Inhibitor Host Factors Study Unknown status
NCT03747042 Phase I Letrozole Letrozole in Post-Menopausal Patients With Operable Hormone-Sensitive Breast Cancer Recruiting
NCT02115048 Phase II Afatinib Letrozole Clinical Study for the Treatment of Breast Cancer the Patient Will Receive Afatinib Plus Letrozole or Letrozole Alone Completed
NCT02764541 Phase II Palbociclib Palbociclib + Tamoxifen Letrozole Tamoxifen Palbociclib and Endocrine Therapy for LObular Breast Cancer Preoperative Study (PELOPS) Recruiting
NCT02450175 Phase I Letrozole Everolimus Etiology of the Platelet-Cancer Metastatic Pathway - A Study of Inflammatory Markers, Platelet Characteristics and Metastatic Surrogates in Cancer Patients and Controls Unknown status
NCT03778931 Phase III Letrozole Exemestane Elacestrant Fulvestrant Anastrozole Phase 3 Trial of Elacestrant vs. Standard of Care for the Treatment of Patients With ER+/HER2- Advanced Breast Cancer (EMERALD) Recruiting
NCT02689921 Phase II Anastrozole Letrozole Leuprolide Pertuzumab + Trastuzumab Exemestane NEOADjuvant Aromatase Inhibitor and Pertuzumab/Trastuzumab for Women With Breast Cancer (NEOADAPT) Active, not recruiting
NCT01160211 Phase III Lapatinib + Trastuzumab Letrozole Anastrozole Lapatinib Trastuzumab Exemestane 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 Active, not recruiting