Drugs / Letrozole
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Letrozole

Other / unclassified targets CYP19A1 via inhibition

Developed for
breast cancer · female breast carcinoma · hormone receptor-positive breast cancer · polycystic ovary syndrome · infertility disorder · breast neoplasm · estrogen-receptor positive breast cancer · HER2 positive breast carcinoma
+103 more · endometrial cancer · Her2-receptor negative breast cancer · female infertility · invasive breast carcinoma · pregnancy disorder with abortive outcome · ovarian cancer · progesterone-receptor positive breast cancer · obesity disorder · anovulation · endometriosis · ovarian carcinoma · atypical endometrial hyperplasia · breast carcinoma · cancer · endometrial carcinoma · endometrial endometrioid adenocarcinoma · fallopian tube cancer · ovarian hyperstimulation syndrome · ovarian serous adenocarcinoma · primary peritoneal carcinoma · ectopic pregnancy · endometrium neoplasm · fallopian tube carcinoma · leiomyoma · leiomyosarcoma · luminal B breast carcinoma · malignant epithelial tumor of ovary · malignant ovarian serous tumor · metastatic malignant neoplasm · metastatic neoplasm · ovarian cyst · ovarian endometrioid adenocarcinoma · peritoneum cancer · prostate carcinoma · tubal pregnancy · uterine corpus leiomyoma · adenomyosis · azoospermia · brain neoplasm · BRCA1-related cancer predisposition · BRCA2-related cancer predisposition · breast adenocarcinoma · breast carcinoma in situ · breast lobular carcinoma · breast mucinous carcinoma · carcinoma · congenital adrenal hyperplasia · exocrine pancreatic carcinoma · fallopian tube neoplasm · fallopian tube serous adenocarcinoma · fibrolamellar hepatocellular carcinoma · gestational trophoblastic neoplasm · hepatopulmonary syndrome · hereditary breast ovarian cancer syndrome · hypogonadotropic hypogonadism · inflammatory breast carcinoma · invasive ductal breast carcinoma · invasive tubular breast carcinoma · luminal A breast carcinoma · lymphangioleiomyomatosis · male breast carcinoma · male infertility · McCune-Albright syndrome · metastatic carcinoma in the bone · oligoasthenoteratozoospermia · oligospermia · ovarian endometriosis · ovarian germ cell tumor · ovarian granulosa cell tumor · ovarian seromucinous carcinoma · ovarian serous cystadenocarcinoma · ovarian serous surface papillary adenocarcinoma · pancreatic ductal adenocarcinoma · pancreatic large cell neuroendocrine carcinoma · peritoneal neoplasm · polyostotic fibrous dysplasia · precocious puberty · pregnancy disorder · pregnancy loss, recurrent, 4 · primary peritoneal serous adenocarcinoma · refractory malignant neoplasm · salivary gland carcinoma · sarcoma · serous neoplasm · soft tissue sarcoma · spermatogenic failure · undifferentiated ovarian carcinoma · uterine cancer · uterine carcinoma · uterine corpus cancer · uterine corpus endometrial stromal sarcoma · basal-like breast carcinoma · cervical squamous cell carcinoma · constitutional delay of growth and puberty · ductal breast carcinoma in situ · hypogonadism, male · isolated short stature · ovarian disorder · ovarian dysfunction · ovarian serous tumor · submucous uterine fibroid · tumor of uterus · uterine disorder
Investigated by
Novartis Pharmaceuticals · National Cancer Institute (NCI) · Pfizer · Novartis · Fudan University · Eli Lilly and Company
+367 more · Dana-Farber Cancer Institute · University of California, San Francisco · Genentech, Inc. · Hoffmann-La Roche · Jiangsu HengRui Medicine Co., Ltd. · M.D. Anderson Cancer Center · SOLTI Breast Cancer Research Group · Assiut University · Cairo University · Mayo Clinic · UNICANCER · University of Washington · Alliance for Clinical Trials in Oncology · Memorial Sloan Kettering Cancer Center · The University of Hong Kong · Vanderbilt-Ingram Cancer Center · Zhejiang Cancer Hospital · Chugai Pharmaceutical · ETOP IBCSG Partners Foundation · Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) · Mansoura University · Massachusetts General Hospital · Rovi Pharmaceuticals Laboratories · Shengjing Hospital · Washington University School of Medicine · Zagazig University · Agendia · Ain Shams University · AstraZeneca · Celcuity Inc · Danish Breast Cancer Cooperative Group · Eisai Inc. · GOG Foundation · GlaxoSmithKline · Johns Hopkins University · Medical College of Wisconsin · NSABP Foundation Inc · Peking University Third Hospital · Roche Pharma AG · University Hospital, Ghent · University of Alabama at Birmingham · Xiaojun Chen · Ahmed Elgazzar Hospital · Ain Shams Maternity Hospital · Anticancer Fund, Belgium · Asan Medical Center · Avenzo Therapeutics, Inc. · BeOne Medicines · Beni-Suef University · Beth Israel Deaconess Medical Center · Boehringer Ingelheim · Breast Cancer Research Foundation · Breast International Group · Brigham and Women's Hospital · Canadian Cancer Trials Group · Canadian Institutes of Health Research (CIHR) · Cancer Prevention Research Institute of Texas · Cancer and Leukemia Group B · Carol Fabian, MD · City of Hope Medical Center · Dartmouth-Hitchcock Medical Center · Dr. Reddy's Laboratories Limited · Duke University · Eastern Cooperative Oncology Group · Erasme University Hospital · European Network of Gynaecological Oncological Trial Groups (ENGOT) · European Organisation for Research and Treatment of Cancer - EORTC · Fondazione Sandro Pitigliani · GBG Forschungs GmbH · Georgetown University · Guangdong Provincial People's Hospital · Gynecologic Oncology Group · Haukeland University Hospital · Heilongjiang University of Chinese Medicine · all 373 on the full record

Regulatory milestones approvals, filings & regulatory actions · 8 recorded

MilestoneJurisdictionBrandIndicationDateSentence it was read from
Label expansions (7) US (FDA) FEMARA 2001-01-10 – 2010-04-30 fda.gov
Approved US (FDA) FEMARA 1997-07-25 fda.gov

Trials 451 · started per year

today
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PhaseRegistry idDatesIndicationSponsorStatusOutcome
Phase 011 trials
Phase 0 NCT05238831 Jan 2023 → May 2026 female breast carcinoma, ovarian carcinoma, pancreatic ductal adenocarcinoma, pancreatic large cell neuroendocrine carcinoma +2 OHSU Knight Cancer Institute Withdrawn No outcome recorded
Phase 0 NCT05157672 Dec 2021 → Aug 2023 Washington State University Unknown No outcome recorded
Phase 0 NCT04361175 Mar → Sep 2021 infertility disorder Assiut University Unknown No outcome recorded
Phase 0 NCT04630210 Feb 2021 → Jan 2025 breast cancer Universitaire Ziekenhuizen KU Leuven Withdrawn No outcome recorded
Phase 0 NCT04130152 Nov 2019 → Jan 2022 breast cancer SOLTI Breast Cancer Research Group Completed No outcome recorded
Phase 0 NCT04049227 Aug 2019 → Apr 2023 endometrial endometrioid adenocarcinoma Northwestern University Completed No outcome recorded
Phase 0 NCT04102618 Mar 2019 → Apr 2022 breast cancer Oncolytics Biotech Terminated No outcome recorded
Phase 0 NCT03378297 May 2018 → Jan 2023 ovarian cancer Haukeland University Hospital Completed No outcome recorded
Phase 0 NCT03122197 May 2017 → Sep 2027 expected brain neoplasm University of Cincinnati Recruiting No outcome recorded
Phase 0 NCT02802748 Jul 2016 → Jan 2018 breast cancer SOLTI Breast Cancer Research Group Completed No outcome recorded
Phase 142 trials
Phase 1 NCT07401381 Jun 2026 → May 2028 expected hormone receptor-positive breast cancer Rovi Pharmaceuticals Laboratories Recruiting No outcome recorded
Phase 1 NCT07604571 May 2026 → Jun 2032 expected hormone receptor-positive breast cancer Novartis Pharmaceuticals Recruiting No outcome recorded
Phase 1 NCT06139107 Aug 2024 → Sep 2026 expected breast cancer Mridula George, MD Recruiting No outcome recorded
Phase 1 NCT06813118 Jun 2024 → Mar 2025 polycystic ovary syndrome HITEC-Institute of Medical Sciences Completed No outcome recorded
Phase 1 NCT06253195 Apr 2024 → Apr 2026 hormone receptor-positive breast cancer, metastatic neoplasm BeOne Medicines Completed No outcome recorded
Phase 1 NCT06120283 Dec 2023 → Nov 2028 expected hormone receptor-positive breast cancer, non-small cell lung carcinoma BeOne Medicines Recruiting No outcome recorded
Phase 1 NCT06315205 Jul 2023 → Mar 2026 overdue Rovi Pharmaceuticals Laboratories Active not recruiting No outcome recorded
Phase 1 NCT04316169 Oct 2021 → Jan 2027 female breast carcinoma Medical College of Wisconsin Withdrawn No outcome recorded
Phase 1 NCT04987632 Aug 2021 → Dec 2022 female infertility, polycystic ovary syndrome Qiu-ping Lin Unknown No outcome recorded
Phase 1 NCT05337657 Jun 2021 → Dec 2023 breast cancer Genor Biopharma Co., Ltd. Unknown No outcome recorded
Phase 1/229 trials
Phase 1/2 NCT07570966 Jun 2026 → Aug 2031 castration-resistant prostate carcinoma, hormone receptor-positive breast cancer Novartis Pharmaceuticals Withdrawn No outcome recorded
Phase 1/2 NCT07389733 Mar 2026 → Dec 2028 expected breast cancer Shandong Suncadia Medicine Co., Ltd. Recruiting No outcome recorded
Phase 1/2 NCT07288359 Dec 2025 → May 2031 expected castration-resistant prostate carcinoma, hormone receptor-positive breast cancer Novartis Pharmaceuticals Recruiting No outcome recorded
Phase 1/2 NCT06998407 Aug 2025 → Aug 2028 expected hormone receptor-positive breast cancer Avenzo Therapeutics, Inc. Recruiting No outcome recorded
Phase 1/2 NCT06706414 Mar 2025 → Aug 2026 overdue male infertility Martin Blomberg Jensen Active not recruiting No outcome recorded
Phase 1/2 NCT06555068 Aug 2024 → Dec 2027 expected breast cancer Jiangsu HengRui Medicine Co., Ltd. Recruiting No outcome recorded
Phase 1/2 NCT05867251 Aug 2023 → Jan 2028 expected endometrial cancer, fallopian tube cancer, hormone receptor-positive breast cancer, malignant epithelial tumor of ovary +2 Avenzo Therapeutics, Inc. Recruiting No outcome recorded
Phase 1/2 NCT05705505 Mar 2023 → Jan 2026 endometrial endometrioid adenocarcinoma Traws Pharma, Inc. Unknown No outcome recorded
Phase 1/2 NCT05918718 Jan 2023 → May 2024 ectopic pregnancy Tehran University of Medical Sciences Unknown No outcome recorded
Phase 1/2 NCT05262400 Mar 2022 → Aug 2026 overdue breast cancer Pfizer Active not recruiting No outcome recorded
Phase 2191 trials
Phase 2 NCT07394946 Jun 2026 → Jul 2027 expected hormone receptor-positive breast cancer Cancer Care Hospital & Research Centre Foundation, Lahore Not yet recruiting No outcome recorded
Phase 2 NCT07618923 Jun 2026 → Jun 2028 expected hormone receptor-positive breast cancer Tang-Du Hospital Not yet recruiting No outcome recorded
Phase 2 NCT07527806 May 2026 → May 2029 expected breast cancer Peking University Cancer Hospital & Institute Not yet recruiting No outcome recorded
Phase 2 NCT07483307 Mar 2026 → Mar 2030 expected Her2-receptor negative breast cancer, breast lobular carcinoma, estrogen-receptor positive breast cancer Memorial Sloan Kettering Cancer Center Recruiting No outcome recorded
Phase 2 NCT07305246 Dec 2025 → Mar 2027 expected breast cancer First Hospital of China Medical University Not yet recruiting No outcome recorded
Phase 2 NCT07179939 Sep 2025 → Dec 2030 expected HER2 positive breast carcinoma Fudan University Not yet recruiting No outcome recorded
Phase 2 NCT07054190 Sep 2025 → Jul 2027 expected breast cancer Hoffmann-La Roche Recruiting No outcome recorded
Phase 2 NCT06979596 Aug 2025 → Nov 2027 expected cancer Merck Sharp & Dohme LLC Recruiting No outcome recorded
Phase 2 NCT06970912 Aug 2025 → Dec 2029 expected female breast carcinoma, hormone receptor-positive breast cancer Peking University People's Hospital Recruiting No outcome recorded
Phase 2 NCT06953882 Jul 2025 → Sep 2030 expected Her2-receptor negative breast cancer Yale University Recruiting No outcome recorded
Show all 191 trials opens the full record — a long page
Phase 2/317 trials
Phase 2/3 NCT07319429 Jan 2026 → Dec 2027 expected endometrial cancer, infertility disorder Fudan University Recruiting No outcome recorded
Phase 2/3 NCT07669402 Dec 2023 → Feb 2026 oligoasthenoteratozoospermia Tehran University of Medical Sciences Completed No outcome recorded
Phase 2/3 NCT03458221 Jan 2023 → Oct 2026 expected ovarian cancer Gynaecologisch Oncologisch Centrum Zuid Recruiting No outcome recorded
Phase 2/3 NCT05454358 Aug 2022 → Dec 2025 endometrial cancer Fudan University Terminated No outcome recorded
Phase 2/3 NCT05316935 Jul 2022 → Mar 2026 overdue atypical endometrial hyperplasia, endometrium neoplasm, progesterone resistance Xiaojun Chen Recruiting No outcome recorded
Phase 2/3 NCT06379113 Jul 2022 → Mar 2026 overdue atypical endometrial hyperplasia, endometrium neoplasm, obesity disorder, progesterone resistance Xiaojun Chen Recruiting No outcome recorded
Phase 2/3 NCT06390904 Jul 2022 → Jul 2025 overdue atypical endometrial hyperplasia, obesity disorder, progesterone resistance Xiaojun Chen Active not recruiting No outcome recorded
Phase 2/3 NCT05203562 Jun 2020 → Dec 2022 gestational trophoblastic neoplasm Zagazig University Unknown No outcome recorded
Phase 2/3 NCT03373708 Dec 2017 → Dec 2019 breast cancer Zhiyong Yu Unknown No outcome recorded
Phase 2/3 NCT03507465 Nov 2017 → Nov 2019 breast cancer Guangdong Provincial People's Hospital Unknown No outcome recorded
Phase 378 trials
Phase 3 NCT07391774 Feb 2027 → Jul 2029 expected Her2-receptor negative breast cancer, estrogen-receptor positive breast cancer National Cancer Institute (NCI) Recruiting No outcome recorded
Phase 3 NCT07340658 Aug 2026 → Feb 2029 expected breast cancer Rovi Pharmaceuticals Laboratories Not yet recruiting No outcome recorded
Phase 3 NCT07153757 Sep 2025 → Sep 2033 expected female breast carcinoma Fudan University Not yet recruiting No outcome recorded
Phase 3 NCT06757634 Jul 2025 → Mar 2029 expected breast cancer Celcuity Inc Recruiting No outcome recorded
Phase 3 NCT07005557 Jun 2025 → May 2030 expected breast cancer Fudan University Not yet recruiting No outcome recorded
Phase 3 NCT06223698 May 2025 → May 2032 expected breast cancer Region Örebro County Not yet recruiting No outcome recorded
Phase 3 NCT06492616 Sep 2024 → Aug 2029 expected breast cancer Stemline Therapeutics, Inc. Recruiting No outcome recorded
Phase 3 NCT06507618 Jul 2024 → Jun 2029 expected female breast carcinoma University of Virginia Recruiting No outcome recorded
Phase 3 NCT06405243 Jun → Dec 2024 polycystic ovary syndrome Beni-Suef University Unknown No outcome recorded
Phase 3 NCT06418347 Apr 2024 → Nov 2025 female infertility, polycystic ovary syndrome Ain Shams University Unknown No outcome recorded
Phase 447 trials
Phase 4 NCT06985186 Jun 2025 → Jun 2026 overdue adenomyosis University of Palermo Not yet recruiting No outcome recorded
Phase 4 NCT07160855 May → Nov 2025 overdue Nishtar Medical University Recruiting No outcome recorded
Phase 4 NCT06143631 Jul 2024 → Sep 2027 expected uterine corpus leiomyoma University of California, San Francisco Recruiting No outcome recorded
Phase 4 NCT06354439 Mar 2024 → Dec 2026 expected tubal pregnancy Hospital de Clinicas de Porto Alegre Recruiting No outcome recorded
Phase 4 NCT05168865 Aug 2023 → Feb 2024 polycystic ovary syndrome, pregnancy disorder with abortive outcome Dubai Fertility Center Withdrawn No outcome recorded
Phase 4 NCT04321551 Jul 2023 → Jun 2028 University of California, San Diego Withdrawn No outcome recorded
Phase 4 NCT05341817 Nov 2022 → Aug 2025 overdue KK Women's and Children's Hospital Recruiting No outcome recorded
Phase 4 NCT05362760 Apr 2022 → Apr 2029 expected hormone receptor-positive breast cancer University of Ulm Recruiting No outcome recorded
Phase 4 NCT05183828 Jan 2022 → May 2026 breast adenocarcinoma, female breast carcinoma, invasive breast carcinoma University of Washington Terminated No outcome recorded
Phase 4 NCT04137640 Jul 2021 → Nov 2025 breast cancer Shengjing Hospital Unknown No outcome recorded
Phase not applicable36 trials
NCT07425990 Feb 2026 → Feb 2027 expected female infertility University of Novi Sad Not yet recruiting No outcome recorded
NCT07636317 Jun 2025 → Mar 2026 pregnancy disorder with abortive outcome Sohag University Completed No outcome recorded
NCT06810492 Apr → Dec 2025 overdue female breast carcinoma Hongmei Zheng, PhD Not yet recruiting No outcome recorded
NCT06605690 Oct 2024 → Aug 2025 overdue breast cancer Liu Shu Not yet recruiting No outcome recorded
NCT06235931 Feb 2024 → Dec 2025 overdue breast neoplasm Second Affiliated Hospital of Soochow University Recruiting No outcome recorded
NCT06006091 Aug 2023 → Aug 2026 overdue female infertility International Peace Maternity and Child Health Hospital Recruiting No outcome recorded
NCT05940233 Jun 2023 → May 2025 overdue Queen Savang Vadhana Memorial Hospital, Thailand Recruiting No outcome recorded
NCT05487092 Dec 2022 → Dec 2026 expected ovarian endometriosis The University of Hong Kong Recruiting No outcome recorded
NCT04169451 Sep 2022 → Dec 2025 infertility disorder Peking University Third Hospital Unknown No outcome recorded
NCT06041204 May 2021 → May 2026 overdue female infertility, hypothyroidism, polycystic ovary syndrome Muhamed Ahmed Abdelmoaty Muhamed Alhagrasy Recruiting No outcome recorded
Also used as a comparator or background therapy in 300 trials
PhaseRegistry idDatesIndicationSponsorStatusOutcome
Phase 06 trials
Phase 0 NCT05464810 Background Sep 2022 → Apr 2027 expected female breast carcinoma, hormone receptor-positive breast cancer, invasive breast carcinoma Emory University Recruiting No outcome recorded
Phase 0 NCT04088032 Background Oct 2019 → Dec 2020 female breast carcinoma, hormone receptor-positive breast cancer Alison Stopeck Withdrawn No outcome recorded
Phase 0 NCT03962647 Background Jul 2019 → Mar 2024 estrogen-receptor positive breast cancer Vanderbilt-Ingram Cancer Center Completed No outcome recorded
Phase 0 NCT02538484 Comparator Apr 2016 → Mar 2020 breast cancer The University of Texas Health Science Center at San Antonio Completed No outcome recorded
Phase 0 NCT02341703 Comparator Feb → Jul 2015 infertility disorder, polycystic ovary syndrome Cairo University Completed No outcome recorded
Phase 118 trials
Phase 1 NCT07029399 Background Mar 2025 → Jul 2027 expected hormone receptor-positive breast cancer, triple-negative breast carcinoma NiKang Therapeutics, Inc. Recruiting No outcome recorded
Phase 1 NCT06218303 Background Feb 2024 → Aug 2026 overdue ductal breast carcinoma in situ Finn, Olivera, PhD Recruiting No outcome recorded
Phase 1 NCT06367712 Comparator Nov 2022 → Nov 2023 polycystic ovary syndrome Egymedicalpedia Completed No outcome recorded
Phase 1 NCT05307705 Background May 2022 → Dec 2026 expected breast cancer Eli Lilly and Company Recruiting No outcome recorded
Phase 1 NCT06570031 Background Nov 2021 → Apr 2026 hormone receptor-positive breast cancer Ono Pharmaceutical Co., Ltd. Completed No outcome recorded
Phase 1/211 trials
Phase 1/2 NCT07596212 Background Jul 2026 → Jul 2028 expected hormone receptor-positive breast cancer, hypoactive sexual desire disorder University of Illinois at Chicago Not yet recruiting No outcome recorded
Phase 1/2 NCT07708194 Background Jun 2025 → Feb 2027 expected HER2 positive breast carcinoma, hormone receptor-positive breast cancer Tianjin Medical University Cancer Institute and Hospital Recruiting No outcome recorded
Phase 1/2 NCT06974929 Background May 2025 → Dec 2026 expected breast cancer Jiangsu HengRui Medicine Co., Ltd. Recruiting No outcome recorded
Phase 1/2 NCT05768139 Background Apr 2023 → Jul 2030 expected breast cancer Eli Lilly and Company Recruiting No outcome recorded
Phase 1/2 NCT03774472 Background Aug 2018 → Apr 2024 female breast carcinoma M.D. Anderson Cancer Center Completed No outcome recorded
Phase 2111 trials
Phase 2 NCT07679269 Background Jan 2027 → Jun 2031 expected PIK3CA-related overgrowth spectrum, breast neoplasm Novartis Pharmaceuticals Not yet recruiting No outcome recorded
Phase 2 NCT07676331 Comparator Aug 2026 → Mar 2028 expected female breast carcinoma, hormone receptor-positive breast cancer Universitaire Ziekenhuizen KU Leuven Not yet recruiting No outcome recorded
Phase 2 NCT07691333 Background Jun 2026 → Jan 2028 expected hormone receptor-positive breast cancer Fujian Cancer Hospital Not yet recruiting No outcome recorded
Phase 2 NCT07610720 Background Jun 2026 → Nov 2028 expected HER2 positive breast carcinoma Sun Yat-sen University Recruiting No outcome recorded
Phase 2 NCT07624903 Comparator Jun 2026 → Jun 2027 expected ectopic pregnancy Kafrelsheikh University Not yet recruiting No outcome recorded
Show all 111 trials opens the full record — a long page
Phase 2/311 trials
Phase 2/3 NCT05860465 Background Sep 2023 → Dec 2026 expected breast cancer Shanghai Pharmaceuticals Holding Co., Ltd Recruiting No outcome recorded
Phase 2/3 NCT05744687 Background Apr 2023 → May 2026 overdue breast cancer Shanghai Pharmaceuticals Holding Co., Ltd Recruiting No outcome recorded
Phase 2/3 NCT05523609 Background Nov 2022 → Sep 2024 breast cancer Tanta University Unknown No outcome recorded
Phase 2/3 NCT02946684 Comparator Feb 2017 → Oct 2018 infertility disorder Sven O. Skouby Completed No outcome recorded
Phase 2/3 NCT02939898 Comparator Aug 2016 → Jan 2018 infertility disorder Sven O. Skouby Completed No outcome recorded
Phase 384 trials
Phase 3 NCT07492641 Background May 2026 → Apr 2029 expected hormone receptor-positive breast cancer BeOne Medicines Recruiting No outcome recorded
Phase 3 NCT06405178 Background Mar 2026 polycystic ovary syndrome Beni-Suef University Completed No outcome recorded
Phase 3 NCT07349069 Comparator Mar 2026 → Dec 2030 expected breast cancer Shandong Suncadia Medicine Co., Ltd. Recruiting No outcome recorded
Phase 3 NCT07400523 Background Feb 2026 → Feb 2030 expected breast cancer Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University Recruiting No outcome recorded
Phase 3 NCT06585969 Comparator Jan 2026 basal-like breast carcinoma, estrogen-receptor positive breast cancer, luminal B breast carcinoma Danish Breast Cancer Cooperative Group Withdrawn No outcome recorded
Phase 417 trials
Phase 4 NCT06181305 Comparator Feb → Nov 2024 Rahem Fertility Center Unknown No outcome recorded
Phase 4 NCT07589075 Background Oct 2023 → Jul 2024 Beni-Suef University Completed No outcome recorded
Phase 4 NCT05809024 Background Mar 2023 → Mar 2025 female breast carcinoma, hormone receptor-positive breast cancer Yongsheng Wang Unknown No outcome recorded
Phase 4 NCT05161195 Background Jul 2022 → Jun 2030 expected metastatic malignant neoplasm Novartis Pharmaceuticals Active not recruiting No outcome recorded
Phase 4 NCT05362799 Comparator Jun 2022 → Dec 2023 female infertility Menoufia University Unknown No outcome recorded
Phase not applicable41 trials
NCT06913075 Comparator Jun → Jul 2026 overdue adenomyosis Indira IVF Hospital Pvt Ltd Not yet recruiting No outcome recorded
NCT07379502 Comparator Mar → Jun 2026 overdue polycystic ovary syndrome CMH Kharian Medical College Not yet recruiting No outcome recorded
NCT07159880 Comparator Sep 2025 → Jul 2026 overdue anovulation, female infertility, polycystic ovary syndrome GABRIEL MONTEIRO PINHEIRO Recruiting No outcome recorded
NCT07065539 Comparator Jul 2025 → May 2027 expected adenomyosis First Affiliated Hospital, Sun Yat-Sen University Not yet recruiting No outcome recorded
NCT07109947 Comparator Jul → Dec 2025 overdue pregnancy disorder with abortive outcome Aswan University Recruiting No outcome recorded
Phase not stated1 trial
NCT02142868 Background Her2-receptor negative breast cancer Pfizer No longer available No outcome recorded

Press releases naming this drug 5 releases

DateIssuerRelease
2017-12-06 Pfizer Updated Data from Phase 3 Trial of IBRANCE® (palbociclib) Plus Letrozole in ER+, HER2- Metastatic Breast Cancer Confirm Improvement in Progression-Free Survival pfizer.com
2017-06-02 Novartis Pharmaceuticals Novartis presents updated data that reinforce the efficacy and safety of Kisqali® (ribociclib) plus letrozole as a first-line option for HR+/HER2- advanced or metastatic breast cancer novartis.com
2016-12-09 Novartis Pharmaceuticals Novartis LEE011 (ribociclib) plus letrozole analyses show superior PFS across broad spectrum of patients in first-line HR+/HER2- advanced breast cancer versus letrozole novartis.com
2016-10-08 Novartis Pharmaceuticals Novartis breakthrough therapy LEE011 plus letrozole demonstrates superior progression-free survival as first-line treatment for HR+/HER2- advanced breast cancer compared to a standard of care novartis.com
2010-01-21 Teva Branded Pharmaceutical Products R&D, Inc. Teva Announces Tentative Approval of Generic Femara® Tablets tevapharm.com

Evidence & citations 24 cited values

Every value below carries the sentence it was read from. 758 sources stand behind the page.

FieldValueCited text
Known as Létrozole “POETIC was an open-label, multicentre, parallel-group, randomised, phase 3 trial (done in 130 UK hospitals) in which postmenopausal women aged at least 50 years with WHO...” PMID 33152284 Nov 2020
746

“One hundred fourteen consecutive elderly women with T2-4 N0-1 and estrogen receptor-positive breast cancer were randomly assigned to primary letrozole therapy (2.5 mg daily for...” PMID 16877730 Aug 2006

“Aromatase inhibitor (anastrozole or exemestane or letrozole) oral daily tablet, or Selective Estrogen Receptor Modulator (SERM) such as tamoxifen oral daily tablet or...” NCT03820830

“aromatase inhibitors ( letrozole 2.5 mg PO per day or Anastrozole 1 mg PO per day or aromasin 25 mg PO per day) if post-menopausal, if premenopausal leutnising hormone...” NCT04012918

“This treatment consisted of any aromatase inhibitor (e.g. letrozole or exemestane), administered intravenously in Cohort A Groups daily for either 18 (if 6 doses of WT1...” NCT01220128

“Options include tamoxifen (20 mg daily), aromatase inhibitors (letrozole 2.5 mg daily, anastrozole 1 mg daily, or exemestane 25 mg daily), or fulvestrant (500 mg...” NCT07708194

“Aromatase inhibitor of the investigator's choice (letrozole, anastrozole, or exemestane) will be provided orally once daily until unacceptable toxicity, documentation of...” NCT01446159

“Letrozole is an aromatase inhibitor. This means it blocks the enzyme aromatase (found in the body's muscle, skin, breast and fat), which is used to convert androgens (hormones...” NCT03959891

“Endocrine therapy is determined by the doctor, including any kind of letrozole, anastrozole, exemestane, fulvestrant, tamoxifen, toremifene, combined with or without drugs or...” NCT03204734

“Endocrine therapy (physician's choice based on prior administered agent including tamoxifen, exemestane, fulvestrant, anastrozole, or letrozole). Endocrine therapy must be...” NCT03184090

“Tamoxifen 20 mg daily, or letrozole 2.5 mg daily, or anastrozole 1 mg daily, or exemestane 25 mg daily (male patients will be treated with tamoxifen 20 mg daily) for a total...” NCT03081234

“They received tablet letrozole 2.5 mg a day for 12 weeks, and the effect of the drug on myoma size and volume and symptomatology was studied along with the adverse effect...” PMID 24103533 Sep 2013

“Postmenopausal patients: Letrozole (2.5 mg, orally, once daily, for 5 years) or Anastrozole (1 mg, orally, once daily, for 5 years) or Exemestane (25 mg, orally, once daily,...” NCT07153757

“Subjects will receive standard therapy with an aromatase inhibitor (exemestane, anastrozole, or letrozole), combined with the experimental treatment of abemaciclib and durvalumab” NCT04088032

“Letrozole 2.5 mg by mouth daily, or anastrozole 1 mg by mouth daily, exemestane 25 mg by mouth daily, tamoxifen 20 mg by mouth daily, for a total duration of at least 60 months.” NCT03078751

“The physician's choice of endocrine therapy (PCET) is limited to tamoxifen or one of the specified third generation aromatase inhibitors: letrozole, anastrozole, or exemestane.” NCT04961996

“Clomiphene citrate (Ovumid®, Iran Hormones Company) 25 mg/day with co-treatment of Letrozole (Letrofem®, Iran Hormones Company) 2.5 mg/day are given from cycle day 3 onwards.” NCT02732808

“Comparison of Clinical Efficacy Between Letrozole + Ribociclib and Fulvestrant + Letrozole + Ribociclib in Hormone Receptor Positive, HER2 Negative Metastatic Breast Cancer” NCT05816655

“Endocrine therapy: letrozole (2.5mg daily), anastrozole (1mg daily), exemestane (25mg daily), tamoxifen (20mg daily) or fulvestrant (intramuscular 500mg every 4 weeks)” NCT06585969

“OBJECTIVE: To examine the use of the aromatase inhibitor letrozole with FSH for ovarian stimulation in poor responders undergoing ovarian superovulation and IUI.” PMID 11937133 Apr 2002

“Patients will receive CB-103 capsules orally (QD) in combination with NSAI therapy (letrozole or anastrozole, continuing prior therapy) also orally once daily” NCT04714619

“aromatase inhibitor (letrozole 2.5mg/d PO, anastrazole 1mg/d PO, or exemestane 25mg/d PO)or Selective Estrogen Receptor Modulator (SERM) (tamoxifen 20mg/d PO)” NCT00240071

“Lapatinib in combination with paclitaxel, letrozole, capecitabine, capecitabine/oxaliplatin, gemcitabine, docetaxel, trastuzumab, FOLFOX4, or FOLFIRI” NCT00790816

“Patients will receive one of the aromatase inhibitors either anastrozole 1 mg po daily, letrozole 2.5 mg po daily, or exemestane 25 mg po daily” NCT01484041

“Aromatase inhibitors(Letrozole/Anastrozole/Exemestane, po, qd, specific dose (letrozole 2.5mg/ day; Anastrozole 1mg/ day, Exemestane 25mg/ day)” NCT05594095

“Anastrozole (1 mg/day) or letrozole (2.5 mg/day) or fulvestrant (2x250 mg at day 1 and day 15 then every 4 weeks after the first injection)” NCT05041842

“Aromatase Inhibitor ( Anastrozole 1 mg, Letrozole 2.5 mg or exemestane 25 mg orally every 24 hours on Days 1 to 28 of a 28-day cycle)” NCT05362760

“Women with ER-positive tumors also received letrozole (plus a luteinizing hormone-releasing hormone [LHRH] agonist if premenopausal).” PMID 23569315 Apr 2013

“The investigator chose an aromatase inhibitor (either anastrozole, letrozole or exemestane 1 mg/2.5 mg/25 mg), once daily, oral.” NCT03910712

“The investigator chose an aromatase inhibitor (either anastrozole, letrozole or exemestane 1 mg/2.5 mg/25 mg), once daily, oral.” NCT04088110

“The AIs the Investigator could choose from were anastrozole, exemestane, and letrozole and dosing was per product information.” NCT02213042

“Includes anastrozole 1 mg/day, letrozole 2.5 mg/day, or exemestane 25 mg/day, administered orally once daily for 4 cycles.” NCT07618923

“["Letrozole","Anastrozole","Exemestane","Tamoxifen","Leuprolide, or other LHRH agonist (per investigator discretion)"]” NCT04569747

“Letrozole is administered orally at 2.5 mg once daily from Day 2 to Day 5 of the menstrual cycle (5 consecutive days).” NCT07296614

“Aromatase inhibitor (either letrozole, anastrozole, or exemestane) of investigator's choice given by mouth once daily” NCT01160211

“drug letrozole in step up dose works better to treat anovulation in infertile women with polycystic ovary syndrome.” NCT07143682

“The hormone therapy will be either letrozole by mouth once a day at home, or fulvestrant as a shot into the muscle.” NCT03519178

“either Anastrozole 1 mg po daily; Letrozole 2.5 mg po daily, Exemestane 25 mg po daily or Tamoxifen 20 mg po daily” NCT01897441

“Endocrine therapy including but not limited to fulvestran, tanastrozole, letrozole or exemestane In regular doses” NCT05431504

“Hemay022 combined with AI (exemestane or letrozole) in the treatment of ER+/HER2+ advanced breast cancer patients” NCT06313983

“Letrozole 2.5mg, Anastrozole 1mg, Exemestane 25mg, or Fulvestrant 0.5g IM on Days 1, 28 (initial: Days 1, 15, 28)” NCT07610720

“Tamoxifen, letrozole, anastrozole, exemestane, fulvestrant, etc, selected at the discretion of the investigator.” NCT05983107

“The endocrine therapy used for the NET in this study will be anastrozole, letrozole, exemestane, or tamoxifen.” NCT07483307

“Letrozole, 2.5 mg, will be orally administered once a day in continuous daily dosing together with PD-0332991.” NCT01684215

“hormone receptor-positive patients were additionally given letrozole (2·5 mg per day orally; if menopausal)” PMID 28238593 Feb 2017

“physician's choice of endocrine therapy (ET) including fulvestrant, letrozole, anastrozole, and exemestane” NCT06486883

“Non-steroidal aromatase inhibitor (letrozole or anastrozole, at the discretion of the treating physician)” NCT03425838

“Investigators choose endocrine therapy including Letrozole, Anastrozole, Exemestane, and Fulvestrant.” NCT06447623

“Investigators choose endocrine therapy including Letrozole, Anastrozole, Exemestane, and Fulvestrant.” NCT05949541

“Clomiphene Citrate Plus HPuFSH Versus Letrozole Plus HPuFSH in Clomid Resistant Infertile PCOS Women” NCT01793038

“All patients will receive the standard of care treatment ie Palbociclib + letrozole for 24-26 weeks” NCT03870919

“Tamoxifen or aromatase inhibitors (Anastrozole, Letrozole, or Exemestane) combined with trastuzumab” NCT01950182

“Leucogen combined with Ribociclib (Kisqali®) and Endocrine Therapy (e.g., Letrozole, Anastrozol)” NCT07380646

“Either Letrozole, Anastrozole, Exemestane or Fulvestrant in combination with CDK 4/6-inhibitor” NCT06044623

“premenopausal: tamoxifen or toremifene; postmenopausal: letrozole or anastrozole or exemestane” NCT04383275

“Endocrine Therapy: Tamoxifen 20mg, Letrozole 2.5mg, Anastrozole 1mg, or Exemestane 25mg PO qd” NCT02040857

“Endocrine Therapy: Exemestane (Aromasin®), Letrozole (Femara®), or Anastrozole (Arimidex®)” NCT03846583

“Letrozole (2.5mg) will be given orally daily each cycle x 4 cycles. (Other Names: Femara)” NCT03573648

“Oral letrozole: 7.5 mg/day during the first 5 days of the controlled ovarian stimulation.” NCT02448459

“Oral letrozole: 7.5 mg/day during the first 5 days of the controlled ovarian stimulation.” NCT02288143

“Letrozole 2.5 mg daily p.o. for five 21-day cycles (to be continued until surgery).” NCT02411344

“Letrozole priming before mTOP is used as an alternative to the use of mifepristone.” NCT05341817

“letrozole oral 2·5 mg/day, anastrozole oral 1 mg/day, or exemestane oral 5 mg/day” NCT07400523

“Letrozole is formulated as tablets of 2.5 mg strength for oral administration.” NCT02511639

“Letrozole: 2.5 mg orally once daily, with a 4-week continuous treatment cycle.” NCT07000344

“Anastrozole or Exemestane or Letrozole administered orally (physician choice)” NCT04188548

“Endocrine therapy: aromatase inhibitors (anastrozole, letrozole, exemestane)” NCT01619111

“NSAI: Anastrozole 1mg, 1 time /d, oral or Letrozole: 2.5mg, 1 time /d, oral” NCT06375707

“Letrozole has been tried for ovarian stimulation for assisted reproduction.” NCT02429999

“Letrozole 2.5 mg/day will be given from cycle day 3 onwards for only 5 days” NCT06928844

“Post-menopausal women will receive letrozole 2.5 mg QD in 28-day cycles.” NCT03969121

“combined with an aromatase inhibitor (letrozole/anastrozole/exemestane)” NCT06970912

“Anastrozole 1 mg, letrozole 2.5 mg, or exemestane 25 mg by mouth daily” NCT06218303

“Letrozole: 2.5 mg once daily on a continuous scheme (tablets, per os)” NCT03079011

“Anastrozole 1mg/day p.o,Exemestane 25mg/day,Letrozole 2.5mg/day p.o.” NCT01924078

“* Letrozole: 2.5 mg, orally, once daily (continuous), every 28 days” NCT05861830

“Chidamide+ exemestane/Fulvestrant/Letrozole/Anastrozole/Tamoxifen” NCT05890287

“Letrozole or anastrozole administered orally (physician choice)” NCT04707196

“ANASTRAZOLE, ARIMIDEX, AROMASINE, EXEMESTANE, FEMARA, LETROZOLE” NCT03624244

“Any brand of letrozole, anastrozole or exemestane may be used” NCT02603679

“letrozole 2.5 mg, anastrozole 1 mg, or exemestane 20 mg PO qd” NCT06145308

“Letrozole 2.5mg PO daily + Placebo 1 tablet PO 2/day x 1week” NCT01589367

“Ribociclib 600 mg/day + letrozole during neoadjuvant phase.” NCT05296746

“letrozole 2.5 mg/day orally or anastrozole 1 mg/day orally” NCT03944434

“Letrozole tablets :Orally, 2.5mg once a day; 28 days/cycle” NCT05744687

“Dalpiciclib combined with Letrozole,28 days as one cycle.” NCT05512780

“Letrozole, anastrozole as prescribed per standard of care” NCT04352777

“Letrozole: 2.5 mg/day on a continuous dosing schedule” NCT03778931

“Endocrine therapy (letrozole/anastrozole/exemestane)” NCT07005557

“tamoxifen, Letrozole, Anastrazole, Exemestane, etc.” NCT04023292

“Endocrine therapy alone (letrozole or fulvestrant)” NCT03809988

“Dalpiciclib combined with letrozole or anastrozole” NCT05640778

“Letrozole selected by the doctor: 2.5mg, oral Q24H” NCT05969184

“2.5 mg of letrozole tablet by mouth once daily or” NCT06369285

“Letrozole 2,5 mg daily or Anastrozole 1 mg daily” NCT04227327

“Letrozole, Recombinant FSH, GnRH antagonist” NCT04356105

“* AI: Anastrozole, Letrozole or Exemestane” NCT05826964

“Letrozole tablets:Administered by oral” NCT05872347

“Letrozole tablets:Administered by oral” NCT05860465

“Letrozole, given per os, 2.5 mg daily” NCT05297617

“anastrozole, letrozole, or exemestane” NCT05894239

“Letrozole: daily oral dose of 2.5 mg.” NCT02448420

Létrozole 2.5 mg/day during 5 years” NCT01127295

“Letrozole, 2.5mg, orally once daily” NCT05411380

“Letrozole, 2.5mg, orally once daily” NCT02767661

“Fermara® (letrozole) 2.5 mg/day PO” NCT00828854

“Letrozole 2.5mg once a day orally” NCT02910050

“Letrozole: 2.5mg, 1 time /d, oral” NCT06656624

“letrozole (2.5 mg every day)” PMID 30106636 Aug 2018

“oral letrozole 2.5 mg daily” NCT04215003

“Letrozole 2.5mg once daily” NCT07527806

“Letrozole or anastrozole” NCT07616453

“Letrozole or anastrozole” NCT07616427

“Letrozole 2.5mg per day” NCT06176534

“Letrozole (2.5mg po qd)” NCT05885776

“letrozole or exemestane” NCT01654185

“Letrozole (2.5mg, qd).” NCT05429684

“ribociclib + letrozole” NCT03050398

“letrozole (Femara®)” NCT00508586

“Femara (Letrozole)” NCT01248416

“Drug: Letrozole” NCT04603183

“Drug: Letrozole” NCT06650748

“Letrozole” NCT04341545

“Letrozole” NCT05512780

“Letrozole” NCT02995772

“Letrozole” NCT07596212

“letrozole” NCT03321981

“Letrozole” NCT00740194

“Letrozole” NCT06810492

“Letrozole” NCT03948568

NCT00530868

NCT06555068

NCT06001762

NCT06492616

NCT00696072

NCT02401425

NCT00601900

NCT00247663

NCT00247650

NCT01219153

NCT02778685

NCT00290745

NCT02333370

NCT06985186

NCT01208441

NCT00960960

NCT00004251

NCT07394946

NCT02647424

NCT04563507

NCT02692755

NCT04331197

NCT05203562

NCT01908556

NCT01439711

NCT06348134

NCT03962647

NCT05800756

NCT01615211

NCT06016738

NCT04964934

NCT01035099

NCT03709082

NCT06047184

NCT05085002

NCT06235931

NCT05909397

NCT05768139

NCT01909141

NCT01758146

NCT00330317

NCT02188745

NCT02703649

NCT02520063

NCT07305246

NCT03220178

NCT01720602

NCT03822468

NCT05514054

NCT07109947

NCT00291135

NCT00498901

NCT03056755

NCT03024580

NCT06143631

NCT07492394

NCT00107016

NCT02137538

NCT04169451

NCT02764541

NCT00267553

NCT02648477

NCT06366347

NCT01919229

NCT04268927

NCT04293393

NCT04407988

NCT00721409

NCT06120283

NCT01046578

NCT04942899

NCT03272477

NCT03936270

NCT02958852

NCT00687648

NCT03691493

NCT02283658

NCT03009838

NCT07014410

NCT01072318

NCT02538484

NCT02939898

NCT00719186

NCT05851014

NCT00084396

NCT06671912

NCT04478266

NCT04002635

NCT01693289

NCT00329940

NCT06243185

NCT00634634

NCT01674140

NCT06413771

NCT07179939

NCT02470741

NCT00305825

NCT03874325

NCT02341703

NCT02344550

NCT00893061

NCT02400567

NCT04987632

NCT00422903

NCT06813118

NCT02188550

NCT06913075

NCT00107263

NCT00673335

NCT05075863

NCT01129622

NCT00754845

NCT02583828

NCT04630210

NCT04486352

NCT03901170

NCT04524026

NCT03439046

NCT02689921

NCT00433589

NCT03458221

NCT07349069

NCT01791478

NCT05952557

NCT01068704

NCT00199134

NCT01272037

NCT03906669

NCT03397537

NCT00134680

NCT01669343

NCT03099174

NCT06394804

NCT05839561

NCT00248170

NCT04486911

NCT03507465

NCT00161291

NCT01791985

NCT00963729

NCT07425990

NCT01105312

NCT03008408

NCT02712723

NCT07492641

NCT06006091

NCT07676331

NCT02742051

NCT04002141

NCT04272801

NCT00083993

NCT05872204

NCT07168837

NCT03355157

NCT02377479

NCT05206448

NCT00535418

NCT04095364

NCT02900105

NCT01999569

NCT05472792

NCT04557449

NCT07285382

NCT06390904

NCT05337657

NCT03481998

NCT05774951

NCT05238831

NCT00499681

NCT04341545

NCT01612871

NCT04568616

NCT00333047

NCT04488107

NCT05198050

NCT04095390

NCT07581834

NCT00101062

NCT04985266

NCT03644186

NCT00375752

NCT05839574

NCT01218581

NCT04191382

NCT07061717

NCT00461773

NCT05181033

NCT05582499

NCT00006174

NCT01499160

NCT05316935

NCT03308201

NCT05150652

NCT02214004

NCT04059484

NCT03007979

NCT00403182

NCT00416715

NCT04321551

NCT06630325

NCT01797718

NCT03284723

NCT04614194

NCT05439499

NCT02679755

NCT05307705

NCT02305693

NCT03283384

NCT02775877

NCT06426979

NCT03181919

NCT07691333

NCT06979596

NCT05512416

NCT02101788

NCT02389088

NCT06354439

NCT01686828

NCT04159649

NCT03285802

NCT00651976

NCT04193930

NCT01068249

NCT00014638

NCT03819010

NCT02450175

NCT03248427

NCT07604571

NCT07391774

NCT06570031

NCT05601700

NCT02946684

NCT03128619

NCT03096847

NCT05766410

NCT03400683

NCT00146146

NCT05512364

NCT03747042

NCT02499146

NCT00238316

NCT02739516

NCT05638594

NCT02619162

NCT01475318

NCT02457312

NCT04194658

NCT06790693

NCT02947685

NCT00114270

NCT06974929

NCT06072781

NCT03554044

NCT04469764

NCT05702957

NCT02313051

NCT02619669

NCT07319429

NCT03219476

NCT00579826

NCT03664050

NCT00238290

NCT04294225

NCT02221999

NCT05900206

NCT05469750

NCT05918718

NCT04606446

NCT03401320

NCT07019363

NCT02482740

NCT05257395

NCT06957379

NCT06276868

NCT01013506

NCT02293668

NCT04316169

NCT03555877

NCT03440359

NCT05649956

NCT01082068

NCT02115048

NCT01116167

NCT02297438

NCT03161353

NCT05163106

NCT00684216

NCT02562118

NCT07379502

NCT04571437

NCT01194440

NCT02686151

NCT02344472

NCT07174336

NCT04886531

NCT02278120

NCT01225172

NCT03135301

NCT00338728

NCT01199367

NCT07288359

NCT02585388

NCT03122197

NCT04069117

NCT07183787

NCT05780567

NCT01797523

NCT00648154

NCT01958021

NCT01375452

NCT02158689

NCT04856371

NCT04129216

NCT04047758

NCT02296801

NCT07636317

NCT07570966

NCT00565240

NCT02730091

NCT05183828

NCT04421547

NCT03497702

NCT06179303

NCT05867251

NCT04931342

NCT07679269

NCT03238703

NCT02912988

NCT06760637

NCT07401381

NCT04553133

NCT00949598

NCT06757634

NCT01372982

NCT00956267

NCT04137640

NCT02907918

NCT02549430

NCT00414076

NCT06075953

NCT01334762

NCT02228681

NCT04215835

NCT01709370

NCT05523609

NCT03011684

NCT05467891

NCT05262400

NCT05437471

NCT01989780

NCT04158362

NCT06361940

NCT01231659

NCT03306472

NCT01698918

NCT00478504

NCT06139107

NCT00844350

NCT00611715

NCT02246621

NCT04619914

NCT05190094

NCT02455154

NCT02657928

NCT04872608

NCT04282031

NCT03900884

NCT00044291

NCT00648063

NCT01205685

NCT00237224

NCT01127295

NCT06405243

NCT00237211

NCT05228951

NCT03058939

NCT05035836

NCT05226871

NCT00050011

NCT00237198

NCT05891093

NCT00945360

NCT00911313

NCT05569811

NCT02730429

NCT00997373

NCT04895761

NCT02269670

NCT01577017

NCT00610077

NCT04584853

NCT03455426

NCT04539496

NCT04217265

NCT03054363

NCT02802748

NCT06367712

NCT05207644

NCT02093351

NCT02551367

NCT00516542

NCT06998407

NCT02865681

NCT00237133

NCT07029399

NCT03879577

NCT07635082

NCT00823004

NCT07255911

NCT02802865

NCT00545077

NCT02763566

NCT02294773

NCT05106712

NCT05940233

NCT05705505

NCT00708214

NCT00856050

NCT04393285

NCT00310180

NCT00004205

NCT07616973

NCT05198141

NCT04289805

NCT00804960

NCT02142868

NCT03839823

NCT05304273

NCT01232075

NCT06405178

NCT02769104

NCT00097344

NCT04130152

NCT00062751

NCT03671330

NCT00505661

NCT00867217

NCT06181305

NCT05979220

NCT06452719

NCT06486870

NCT00902954

NCT03633331

NCT06793904

NCT01870505

NCT02918084

NCT01872260

NCT01740427

NCT04551495

NCT01368263

NCT03424005

NCT02980965

NCT00208273

NCT03540979

NCT02941926

NCT05827081

NCT07190443

NCT04906395

NCT01044862

NCT02304107

NCT03373708

NCT06654570

NCT03673124

NCT00796107

NCT04102618

NCT07101159

NCT06507618

NCT03774472

NCT00770354

NCT00382070

NCT00333086

NCT01431352

NCT02491983

NCT01457703

NCT05487092

NCT03241472

NCT05207709

NCT02491320

NCT07024173

NCT00880009

NCT05874518

NCT02806050

NCT04577001

NCT01430585

NCT00728949

NCT06605690

NCT00541086

NCT00073528

NCT06379113

NCT07159880

NCT03966898

NCT02624973

NCT00332709

NCT02010021

NCT04308343

NCT05464810

NCT07589075

NCT02273973

NCT03006172

NCT02057133

NCT01655225

NCT00351416

NCT04834791

NCT00894608

NCT00194779

NCT05847257

NCT06706414

NCT01042379

NCT05286437

NCT01248494

NCT00241046

NCT04590482

NCT02630485

NCT07389733

NCT06253195

NCT02701348

NCT00532272

NCT07160855

NCT06465368

NCT01275859

NCT07624903

NCT00688909

NCT05645536

NCT02661932

NCT01077453

NCT00240942

NCT00265759

NCT05454358

NCT05712941

NCT00412022

NCT01642186

NCT07448272

NCT00263198

NCT03772353

NCT03675893

NCT04134598

NCT04300790

NCT00999804

NCT02684032

NCT00138710

NCT00908531

NCT01771458

NCT02154776

NCT07054190

NCT02097680

NCT00688194

NCT05161195

NCT00549822

NCT04361175

NCT06504082

NCT00171314

NCT00280930

NCT00001521

NCT00090857

NCT06223698

NCT06403488

NCT01064635

NCT02095184

NCT01353209

NCT05157672

NCT06507332

NCT04852887

NCT06953882

NCT06315205

NCT07340658

NCT02670304

NCT00553410

NCT01315912

NCT04256941

NCT07669402

NCT05166668

NCT01153672

NCT05205837

NCT04177693

NCT04720807

NCT06418347

NCT00903162

NCT00171704

NCT03378297

NCT03913234

NCT05247268

NCT02600923

NCT07085767

NCT05463601

NCT02894398

NCT04220476

NCT06380751

NCT00171808

NCT00171847

NCT02005887

NCT06244745

NCT06733727

NCT01553903

NCT01296555

NCT01780610

NCT00332852

NCT03900637

NCT02128360

NCT00171340

NCT03628625

NCT02405156

NCT00003140

NCT02152943

NCT03628066

NCT04111978

NCT02291913

NCT01679574

NCT05809024

NCT06041204

NCT04546009

NCT05168865

NCT03625531

NCT04364581

NCT04049227

NCT03179904

NCT05004142

NCT00573755

Known as Brand name Femar Brand name FemarNCT01615211
Known as CGS 20267 “Letrozole is a chemical compound, CGS 20267 which is a third-generation, nonsteroidal aromatase inhibitor.” NCT06367712
1

“Letrozole, or CGS 20267, is an oral non-steroidal type II aromatase inhibitor.” NCT04619914

Known as femar “24 weeks of treatment with either tablet letrozole (femar®) initial dose of 2.5 mg each day versus tablet placebo.” NCT05205837
Known as Femar, letrozol, Novartis Healthcare “Femar®, letrozol, Novartis Healthcare” NCT00935558
Known as Femara “The purpose of this study is to determine whether the first line combination hormonal therapy of an experimental drug, atamestane, plus an FDA-approved drug, toremifene...” NCT00044291
38

“Based on the results from this trial, the aromatase inhibitor letrozole (Femara) is currently recommended as a part of standard adjuvant therapy for postmenopausal women with...” PMID 17912636 Oct 2007

“In the letrozole group, withdrawal bleeding was achieved using 10 mg of dydrogesterone tablets for 10 days before stimulation, then 2.5 mg of letrozole oral tablets (Femara;...” NCT00956267

“The purpose of this study is to evaluate the objective response rate of a combination of letrozole (Femara) and bevacizumab (Avastin) given preoperatively to postmenopausal...” NCT00461773

“The purpose of the study is to investigate the effects (good and bad) that the combination of the drugs letrozole (also called Femara™) and trastuzumab (also called Herceptin®)...” NCT00134680

“letrozole (femara, Novartis) orally in a dose of 2.5 mg daily, on day 2 of cycle for 5 days and gonadotropins (300-450 IU) IM start on cycle day 3. then the dose modulated...” NCT05166668

“Letrozole (trade name: Femara®; Novartis Pharma Schweiz AG, Switzerland; imported drug license No. H20140149): 2.5 mg/table, 1 table by mouth once a day, continuously for a...” NCT04047758

“Group 2 will receive Letrozole (Femara®, Novartis, Switzerland) 2.5mg twice daily for 5 days starting from the 3rd day of menstruation or progesterone withdrawal bleeding.” NCT02304107

“Group 1 will receive Letrozole (Femara®, Novartis, Switzerland) 2.5mg twice daily for 5 days starting from the 3rd day of menstruation or progesterone withdrawal bleeding” NCT02305693

“Letrozole, sold under the brand name Femara among others, is an aromatase inhibitor which is used in the treatment of hormonally-responsive breast cancer after surgery.” NCT03901170

“This is a randomized phase II study of letrozole (Femara) administered 2.5 mg orally daily to patients with newly diagnosed clinical stage I and II LMS.” NCT05649956

“Patients in the MTX + letrozole group received letrozole tablets (Femara 2.5 mg) once daily for ten days starting from the day of MTX administration.” NCT06504082

“Letrozole oral tablets (Femara 2.5 mg tablet; Novartis Pharma Services, Switzerland) 2.5 mg tab twice daily for 5 days from cycle day 3.” NCT02739516

“Letrozole (Femara; Novertis pharma AG, Basle, Switzerland) is administered starting on cycle day one for 8 consecutive days .” NCT01219153

“Letrozole (Femara; Novertis pharma AG, Basle, Switzerland) is administered starting on cycle day one for 8 consecutive days .” NCT04268927

“the single agent FDA-approved aromatase inhibitor letrozole (Femara®) for the treatment of advanced breast cancer.” NCT00267553

“Letrozole (Femara; Novartis pharma AG, Basle, Switzerland) 2.5mg /day is administered from cycle day 1 to 9” NCT01232075

“Letrozol (Femara, Novartis) at a dose of 2.5mg twice daily starting from day 3 of the cycle for 5 days.” NCT05362799

“Group A received oral letrozole (2.5 mg/day, Femara, Novartis PharmaServices, Basel, Switzerland)” NCT01218581

“Endocrine Therapy: Exemestane (Aromasin®), Letrozole (Femara®), or Anastrozole (Arimidex®)” NCT03846583

“All patients start standard therapy with oral letrozole (Femara), day 1 of the study.” NCT04563507

“All patients start standard therapy with oral letrozole (Femara), day 1 of the study.” NCT04220476

“5 mg daily (Femara®, Novartis Pharmaceuticals Corporation, East Hanover, NJ )” NCT01999569

“letrozole 2.5mg (Femara; Novartis Pharma Services, Basel, Switzerland)” NCT04069117

“Letrozole (Femara; Novartis, East Hanover, NJ) at a dose of 5 mg/day” NCT02293668

“letrozole (Femara; Novartis pharma AG, Basle, Switzerland)” NCT04619914

“Letrozole tablets (Femara; Novartis Pharma, Switzerland)” NCT00911313

“standard oral daily tablet of letrozole (Femara®)” NCT07401381

“Patients receive oral letrozole (Femara) daily.” NCT00014638

“letrozole (Femara®, Novartis New York, NY, USA)” NCT04834791

“another approved drug, letrozole (Femara®)” NCT00097344

Femara® Tablets 2.5 mg” NCT00648063

Femara® Tablets 2.5 mg” NCT00648154

“letrozole (Femara®)” NCT00508586

“letrozole (Femara)” NCT01082068

“letrozole (Femara)” NCT00908531

“Letrozole (Femara)” NCT00138710

NCT01948804

NCT00634894

Known as Femara (Letrozole) Femara (Letrozole)NCT01248416
3

Femara (letrozole)NCT01897441

Femara (Letrozole)NCT00530868

Femara (letrozole)NCT00240071

Known as FemarTM “Patients entered into this study will be given letrozole (FemarTM) in combination with ribociclib (KisqaliTM) for at least 6 months.” NCT05163106
Known as Fermara Fermara® (letrozole) 2.5 mg/day PO” NCT00828854
Known as LEBE “single IM injection of Letrozole LEBE 75 mg” NCT06315205
Known as LET “The phase 3 MONALEESA-2 study demonstrated that addition of ribociclib (RIB) to letrozole (LET) significantly improved progression-free survival (PFS) in patients (pts) with...” PMID 29404806 Feb 2018
3

“The National Cancer Institute of Canada Clinical Trials Group MA.17 trial examined the efficacy of letrozole (LET) started within 3 months of 5 years of adjuvant tamoxifen in...” PMID 18332475 Mar 2008

“After 24 wks, an aromatase inhibitor, letrozole (LET, 2.5 mg/d oral), will be co-administered with TC for 8 wks to block estrogen synthesis and examine whether T's effects are...” NCT04321551

“In Phase 2, the same protocol was employed with the addition of an aromatase inhibitor (letrozole, LET) administered daily beginning at week 4 for 2 weeks.” PMID 28187771 Feb 2017

Known as Letrofem “Clomiphene citrate (Ovumid®, Iran Hormones Company) 25 mg/day with co-treatment of Letrozole (Letrofem®, Iran Hormones Company) 2.5 mg/day are given from cycle day 3 onwards.” NCT02732808
Known as letrol “The experimental arm (p1) will be treated with letrozole 5 mg for 10 days. The comparator arm (p2) will receive letrozole 10mg for 5 days (Tab letrol 2.5mg -Renata Pharmaceutical.” NCT07448272
Known as Letrozol “The intervention will include changes in medication (e.g. change from Letrozol to Tamoxifen, treatment for polyneuropathy, osteoporosis).” NCT06120595
5

“Patients will be given Letrozol 2.5 mg or Anastrazol1 mg, every 24H and all of them will be given Calcium + Vit D supplement.” NCT03111615

“4. Letrozol tablets, 2.5 mg x 1 orally” NCT03378297

“Femar®,letrozol, Novartis Healthcare” NCT00935558

Letrozol or Anastrozol or Exemestane” NCT02592083

NCT05362799

Known as Letrozole (Femara) Letrozole (Femara)NCT06218303
2

Letrozole (Femara)NCT00161291

“Letrozole(Femara)” NCT00579826

Known as Letrozole component of kisqali femara co-pack ChEMBL registry synonym — accepted as the source's own label CHEMBL1444
Known as Letrozole Tablets “Drug: Letrozole TabletsNCT04906395
Known as Letrozole(Femara, Novartis Pharmaceuticals) Letrozole(Femara, Novartis Pharmaceuticals)NCT02491320
Known as LTZ “Postmenopausal women with untreated stage I-III HR+/HER2-negative breast cancer were randomized (1:1:1) to receive 3 weeks of letrozole (LTZ) 2.5 mg/day, oral mVNB 50 mg 3...” PMID 31533777 Sep 2019
1

“The use of aromatase inhibitor, letrozole (LTZ), in reproductive medicine started in 2001.” NCT02647424

Known as NSC-759652 ChEMBL registry synonym — accepted as the source's own label CHEMBL1444
Action Inhibit “Aromatase inhibitors work by inhibiting the action of the enzyme aromatase, which converts androgens into estrogens by a process called aromatization.” NCT00001521
Modality Other / unclassified “the aromatase inhibitor letrozole” PMID 16145047 Sep 2005
Route Oral “letrozole - 1.5mg/m\^2 body surface area orally” NCT00001521
Target CYP19 “Letrozole is a potent and highly selective third generation aromatase inhibitor that was developed in the early 1990's. Aromatase is an enzyme of the cytochrome P-450...” NCT01035099