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imlunestrant + abemaciclib
- Development stage
- Phase 3
- Lead developer
- Eli Lilly
- Modality
- Small Molecules
- Administration
- Oral
01
Overview
Imlunestrant + abemaciclib is a **combination of imlunestrant**, a next-generation, oral, brain-penetrant selective estrogen receptor degrader (SERD) and pure estrogen receptor antagonist, and **abemaciclib**, a cyclin-dependent kinase 4 and 6 (CDK4/6) inhibitor. This combination is designed to deliver continuous estrogen receptor inhibition—including in cancers harboring *ESR1* mutations—while also blocking cell cycle progression via CDK4/6 inhibition. The combination demonstrated significantly improved progression-free survival compared to imlunestrant alone in patients with estrogen receptor (ER)-positive, HER2-negative advanced breast cancer that recurred or progressed following endocrine therapy. Safety was consistent with known profiles, with predominantly low-grade adverse effects.
- Other names
- Imlunestrant plus abemaciclibIMPATIENS regimen
02
Targets
CDK4 (Cyclin-dependent kinase 4)CDK6 (Cyclin-dependent kinase 6)ESR1 (ERα)ESR2 (ERβ)
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