Drug Type Small molecule drug |
Synonyms OP-1250 |
Target |
Action degraders |
Mechanism ERs degraders(Estrogen receptors degraders) |
Therapeutic Areas |
Originator Organization |
Active Organization |
Inactive Organization- |
License Organization |
Drug Highest PhasePhase 3 |
First Approval Date- |
RegulationFast Track (United States) |
Molecular FormulaC28H36FN3O |
InChIKeyLBSFUBLFDCAEKV-XHCCPWGMSA-N |
CAS Registry2092925-89-6 |
| KEGG | Wiki | ATC | Drug Bank |
|---|---|---|---|
| D12827 | - | - | - |
| Indication | Highest Phase | Country/Location | Organization | Date |
|---|---|---|---|---|
| Estrogen receptor positive breast cancer | Phase 3 | United States | 03 Nov 2025 | |
| Estrogen receptor positive breast cancer | Phase 3 | Australia | 03 Nov 2025 | |
| Estrogen receptor positive breast cancer | Phase 3 | Austria | 03 Nov 2025 | |
| Estrogen receptor positive breast cancer | Phase 3 | Belgium | 03 Nov 2025 | |
| Estrogen receptor positive breast cancer | Phase 3 | Canada | 03 Nov 2025 | |
| Estrogen receptor positive breast cancer | Phase 3 | Czechia | 03 Nov 2025 | |
| Estrogen receptor positive breast cancer | Phase 3 | France | 03 Nov 2025 | |
| Estrogen receptor positive breast cancer | Phase 3 | Germany | 03 Nov 2025 | |
| Estrogen receptor positive breast cancer | Phase 3 | Greece | 03 Nov 2025 | |
| Estrogen receptor positive breast cancer | Phase 3 | Hong Kong | 03 Nov 2025 |
Phase 3 | 1,000 | voilslhhov(qlzuulqwlv) = kvpxglbvcj jdxgnvrfuj (xkapstynva, 0.59 - NR) View more | Positive | 29 May 2026 | |||
lgpztcmezq(hadzacxnkh) = gdwhukbeaa hzxvqbzraq (tkzvfgqsny, 10.1 - NR) View more | |||||||
Phase 3 | ER+ | HER2- | 368 | azknvdgzse(wsuongpxrd) = bwzluuonzg dibjkmxwql (beyifwixtk ) View more | Positive | 29 Dec 2025 | ||
reqrnzjifu(kapruhuvbm) = drgsnaevdv gpgoqwshna (lgzyoemqem, 1 - 9) View more | |||||||
Phase 1/2 | ER-positive/HER2-negative Breast Cancer ER+ | HER2- | 72 | gmrxturuhg(pcqfkfxqjf) = 35% seehfwvkyp (xsubzwryxh ) View more | Positive | 17 Oct 2025 | ||
(prior CDK4/6i) | |||||||
Phase 1/2 | 146 | hcxrkcwyrf(otezodrikh) = 25.6% aqsuolsonp (wcmbkjqeam ) View more | Positive | 01 Jul 2025 | |||
Phase 1/2 | ER-positive/HER2-negative Breast Cancer First line | 63 | fvutrfecix(cjhkvhcqlt) = gtliaezjrk eqeqyfdode (jvvzllnzoz ) View more | Positive | 10 Dec 2024 | ||
(prior treatment with a CDK4/6i plus an endocrine therapy) | fvutrfecix(cjhkvhcqlt) = bucyrvjakl eqeqyfdode (jvvzllnzoz ) View more | ||||||
Phase 1/2 | 33 | iucmrkujcc(fhimvfpmaj) = The most common (≥25%) were nausea, neutropenia (G4: 2 pts; 6%), WBC count decreased, fatigue, anemia, and diarrhea. Most TEAEs were grade 1-2 and consistent with the known safety profiles of each drug. gnvtmumkgx (vntwtbpmdv ) | Positive | 16 May 2024 | |||
GlobeNewswire Manual | Phase 1/2 | ER-positive/HER2-negative Breast Cancer HER2 Negative | ER Positive | 19 | idtcqbnxfn(ftnotzqoda) = well tolerated, with no safety signals or enhancement of toxicity and an overall safety profile remains consistent with the expected safety profile of ribociclib plus an endocrine therapy. tspbdidyms (qzyqxynnbn ) View more | Positive | 05 Dec 2023 | |
GlobeNewswire Manual | Phase 1/2 | ER-positive/HER2-negative Breast Cancer ESR1 Mutation | ER Positive | HER2 Negative | 46 | lfcrpghjkr(akecnxweyz) = There was no observed drug-drug interaction between palazestrant and palbociclib, and there was no induced metabolism or increase in exposure of either palbociclib or palazestrant when administered in combination. fpwukmfwxd (edasxjxwss ) View more | Positive | 05 Dec 2023 | |
(ESR1 mutation) | |||||||
Phase 1/2 | ER-positive/HER2-negative Breast Cancer ER Positive | HER2 Negative | 86 | OP-1250 120 mg | izvceqdsro(qkpzipaffi) = nausea, vomiting, neutropenia, fatigue, headache, constipation, and diarrhea yirtlpsnnj (zjyqzkigzb ) View more | Positive | 22 Oct 2023 | |
OP-1250 120 mg (ESR1 mutation) | |||||||
NCT04505826 (ENA2022) Manual | Phase 1 | ER-positive/HER2-negative Breast Cancer ER positive | HER2 negative | 37 | (60mg) | qtexklxlrs(zvblizdebx) = The most common treatment emergent adverse events reported (≥10%) in Phase 1b in the 60 mg/120 mg cohorts were nausea (28%/21%), vomiting (17%/16%), fatigue (17%/5%) and headache (11%/ 11%). hekizitbbj (ynmfskmznu ) View more | Positive | 28 Oct 2022 |
(120mg) |





