ORSERDU™ (elacestrant) Logo
This site is intended for US Healthcare Professionals only.
Home
ESR1 Mutations
ESR1m emergenceTesting
MoD & MoA
background
In ER+/HER2- mBCSERMs and fulvestrant have decreased binding affinity for ESR1-mutated receptors1ESR1 mutations structurally alter the binding pocket of estrogen receptors, which can lead to ligand independent tumor growth, resulting in cancer proliferation, metastasis, and resistance
PFS in Patients Taking ORSERDU™ (elacestrant) vs SOC Endocrine Monotherapy

Adapted with permission from Brett JO, Spring LM, Bardia A, Wander SA. ESR1 mutation as an emerging clinical biomarker in metastatic hormone receptor-positive breast cancer. Breast Cancer Res. 2021;23(1):85.

ER+, estrogen receptor-positive; ESR1, estrogen receptor 1; ESR1m, estrogen receptor 1 mutation; HER2-, human epidermal growth factor receptor 2-negative; mBC, metastatic breast cancer; SERMs, selective estrogen receptor modulators.

*Specifically refers to tamoxifen from this analysis.


In ER+/HER2- ESR1-mutated mBC following progression on ETORSERDU has strong binding affinity for ESR1-mutated receptors2,3ORSERDU binds to the mutated ESR1 receptor, resulting in receptor degradation and antitumor activity4,5
PFS in Patients Taking ORSERDU™ (elacestrant) vs SOC Endocrine Monotherapy
  • ORSERDU is an ER antagonist that binds to ER-alpha4

  • ORSERDU demonstrated in vitro and in vivo antitumor activity, including in cells resistant to fulvestrant and a CDK4/6i, and cells with ESR1 mutations4

  • ORSERDU inhibited 17β-estradiol-mediated cell proliferation at concentrations inducing degradation of ER-alpha protein mediated through the proteasomal pathway in ER+/HER2- breast cancer cells4

  • ORSERDU does not target the PI3K/AKT/mTOR pathway4,6

AKT, protein kinase B; CDK4/6i, cyclin-dependent kinase 4/6 inhibitor; ER+, estrogen receptor-positive; ESR1, estrogen receptor 1; ET, endocrine therapy; HER2-, human epidermal growth factor receptor 2-negative; mBC, metastatic breast cancer; mTOR, mammalian target of rapamycin; PI3K, phosphatidylinositol 3-kinase.

Learn more about Efficacy

IMPORTANT SAFETY INFORMATION

Warnings and Precautions

  • Dyslipidemia: Hypercholesterolemia and hypertriglyceridemia occurred in patients taking ORSERDU at an incidence of 30% and 27%, respectively. The incidence of Grade 3 and 4 hypercholesterolemia and hypertriglyceridemia were 0.9% and 2.2%, respectively. Monitor lipid profile prior to starting and periodically while taking ORSERDU.

  • Embryo-Fetal Toxicity: Based on findings in animals and its mechanism of action, ORSERDU can cause fetal harm when administered to a pregnant woman. Advise pregnant women and females of reproductive potential of the potential risk to a fetus. Advise females of reproductive potential to use effective contraception during treatment with ORSERDU and for 1 week after the last dose. Advise male patients with female partners of reproductive potential to use effective contraception during treatment with ORSERDU and for 1 week after the last dose.

Adverse Reactions

  • Serious adverse reactions occurred in 12% of patients who received ORSERDU. Serious adverse reactions in >1% of patients who received ORSERDU were musculoskeletal pain (1.7%) and nausea (1.3%). Fatal adverse reactions occurred in 1.7% of patients who received ORSERDU, including cardiac arrest, septic shock, diverticulitis, and unknown cause (one patient each).

  • The most common adverse reactions (≥10%), including laboratory abnormalities, of ORSERDU were musculoskeletal pain (41%), nausea (35%), increased cholesterol (30%), increased AST (29%), increased triglycerides (27%), fatigue (26%), decreased hemoglobin (26%), vomiting (19%), increased ALT (17%), decreased sodium (16%), increased creatinine (16%), decreased appetite (15%), diarrhea (13%), headache (12%), constipation (12%), abdominal pain (11%), hot flush (11%), and dyspepsia (10%).

Drug Interactions

  • Concomitant use with CYP3A4 inducers and/or inhibitors: Avoid concomitant use of strong or moderate CYP3A4 inhibitors with ORSERDU. Avoid concomitant use of strong or moderate CYP3A4 inducers with ORSERDU.

Use in Specific Populations

  • Lactation: Advise lactating women to not breastfeed during treatment with ORSERDU and for 1 week after the last dose.

  • Hepatic Impairment: Avoid use of ORSERDU in patients with severe hepatic impairment (Child-Pugh C). Reduce the dose of ORSERDU in patients with moderate hepatic impairment (Child-Pugh B).

The safety and effectiveness of ORSERDU in pediatric patients have not been established.

ORSERDU is available as 345 mg tablets and 86 mg tablets.

INDICATION

ORSERDU (elacestrant) is indicated for the treatment of postmenopausal women or adult men with estrogen receptor (ER)-positive, human epidermal growth factor receptor 2 (HER2)-negative, ESR1-mutated advanced or metastatic breast cancer with disease progression following at least one line of endocrine therapy.

To report SUSPECTED ADVERSE REACTIONS, contact Stemline Therapeutics, Inc. at 1-877-332-7961 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

Please see full Prescribing Information, including Patient Information.

References: 1. Brett JO, Spring LM, Bardia A, Wander SA. ESR1 mutation as an emerging clinical biomarker in metastatic hormone receptor-positive breast cancer. Breast Cancer Res. 2021;23(1):85. 2. Bihani T, Patel HK, Arlt H, et al. Elacestrant (RAD1901), a selective estrogen receptor degrader (SERD), has antitumor activity in multiple ER+ breast cancer patient-derived xenograft models. Clin Cancer Res. 2017;23(16):4793-4804. 3. Bihani T, Patel HK, Arlt H, et al. Elacestrant (RAD1901), a selective estrogen receptor degrader (SERD), has antitumor activity in multiple ER+ breast cancer patient-derived xenograft models. Clin Cancer Res. 2017;23(16):4793-4804 [supplementary appendix]. 4. ORSERDU [prescribing information]. New York, NY: Stemline Therapeutics, Inc., a Menarini Group Company, 2023. 5. Bardia A, Aftimos P, Bihani T, et al. EMERALD: phase III trial of elacestrant (RAD1901) vs endocrine therapy for previously treated ER+ advanced breast cancer. Future Oncol. 2019;15(28):3209-3218. 6. Patel HK, Bihani T. Selective estrogen receptor modulators (SERMs) and selective estrogen receptor degraders (SERDs) in cancer treatment. Pharmacol Ther. 2018;186:1-24.

ORSERDU is a registered trademark of the Menarini Group.

© 2024 Stemline Therapeutics, Inc., a Menarini Group Company. All rights reserved. 02/24 MAT-US-ELA-00146

Privacy Policy & Terms of Use

|

Cookies Settings

|

MENARINI Group Logo
Stemline® Logo

IMPORTANT SAFETY INFORMATION

+

Warnings and Precautions

  • Dyslipidemia: Hypercholesterolemia and hypertriglyceridemia occurred in patients taking ORSERDU at an incidence of 30% and 27%, respectively. The incidence of Grade 3 and 4 hypercholesterolemia and hypertriglyceridemia were 0.9% and 2.2%, respectively. Monitor lipid profile prior to starting and periodically while taking ORSERDU.

  • Embryo-Fetal Toxicity: Based on findings in animals and its mechanism of action, ORSERDU can cause fetal harm when administered to a pregnant woman. Advise pregnant women and females of reproductive potential of the potential risk to a fetus. Advise females of reproductive potential to use effective contraception during treatment with ORSERDU and for 1 week after the last dose. Advise male patients with female partners of reproductive potential to use effective contraception during treatment with ORSERDU and for 1 week after the last dose.

Adverse Reactions

  • Serious adverse reactions occurred in 12% of patients who received ORSERDU. Serious adverse reactions in >1% of patients who received ORSERDU were musculoskeletal pain (1.7%) and nausea (1.3%). Fatal adverse reactions occurred in 1.7% of patients who received ORSERDU, including cardiac arrest, septic shock, diverticulitis, and unknown cause (one patient each).

  • The most common adverse reactions (≥10%), including laboratory abnormalities, of ORSERDU were musculoskeletal pain (41%), nausea (35%), increased cholesterol (30%), increased AST (29%), increased triglycerides (27%), fatigue (26%), decreased hemoglobin (26%), vomiting (19%), increased ALT (17%), decreased sodium (16%), increased creatinine (16%), decreased appetite (15%), diarrhea (13%), headache (12%), constipation (12%), abdominal pain (11%), hot flush (11%), and dyspepsia (10%).

Drug Interactions

  • Concomitant use with CYP3A4 inducers and/or inhibitors: Avoid concomitant use of strong or moderate CYP3A4 inhibitors with ORSERDU. Avoid concomitant use of strong or moderate CYP3A4 inducers with ORSERDU.

Use in Specific Populations

  • Lactation: Advise lactating women to not breastfeed during treatment with ORSERDU and for 1 week after the last dose.

  • Hepatic Impairment: Avoid use of ORSERDU in patients with severe hepatic impairment (Child-Pugh C). Reduce the dose of ORSERDU in patients with moderate hepatic impairment (Child-Pugh B).

The safety and effectiveness of ORSERDU in pediatric patients have not been established.

ORSERDU is available as 345 mg tablets and 86 mg tablets.

INDICATION

ORSERDU (elacestrant) is indicated for the treatment of postmenopausal women or adult men with estrogen receptor (ER)-positive, human epidermal growth factor receptor 2 (HER2)-negative, ESR1-mutated advanced or metastatic breast cancer with disease progression following at least one line of endocrine therapy.

To report SUSPECTED ADVERSE REACTIONS, contact Stemline Therapeutics, Inc. at 1-877-332-7961 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

Please see full Prescribing Information, including Patient Information.

References: 1. Brett JO, Spring LM, Bardia A, Wander SA. ESR1 mutation as an emerging clinical biomarker in metastatic hormone receptor-positive breast cancer. Breast Cancer Res. 2021;23(1):85. 2. Bihani T, Patel HK, Arlt H, et al. Elacestrant (RAD1901), a selective estrogen receptor degrader (SERD), has antitumor activity in multiple ER+ breast cancer patient-derived xenograft models. Clin Cancer Res. 2017;23(16):4793-4804. 3. Bihani T, Patel HK, Arlt H, et al. Elacestrant (RAD1901), a selective estrogen receptor degrader (SERD), has antitumor activity in multiple ER+ breast cancer patient-derived xenograft models. Clin Cancer Res. 2017;23(16):4793-4804 [supplementary appendix]. 4. ORSERDU [prescribing information]. New York, NY: Stemline Therapeutics, Inc., a Menarini Group Company, 2023. 5. Bardia A, Aftimos P, Bihani T, et al. EMERALD: phase III trial of elacestrant (RAD1901) vs endocrine therapy for previously treated ER+ advanced breast cancer. Future Oncol. 2019;15(28):3209-3218. 6. Patel HK, Bihani T. Selective estrogen receptor modulators (SERMs) and selective estrogen receptor degraders (SERDs) in cancer treatment. Pharmacol Ther. 2018;186:1-24.