Last update 24 Feb 2026

Abemaciclib

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
Abemaciclib (JAN/USAN), Abemaciclib mesylate, Bemaciclib
+ [8]
Action
inhibitors
Mechanism
CDK4 inhibitors(Cyclin-dependent kinase 4 inhibitors), CDK6 inhibitors(Cyclin-dependent kinase 6 inhibitors)
Originator Organization
Inactive Organization
Drug Highest PhaseApproved
First Approval Date
RegulationFast Track (United States), Priority Review (China), Special Review Project (China), Breakthrough Therapy (United States)
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Structure/Sequence

Molecular FormulaC27H32F2N8
InChIKeyUZWDCWONPYILKI-UHFFFAOYSA-N
CAS Registry1231929-97-7

External Link

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Advanced breast cancer
Canada
08 Apr 2019
Metastatic breast cancer
Canada
08 Apr 2019
HR Positive/HER2 Negative/Node positive breast cancer
European Union
26 Sep 2018
HR Positive/HER2 Negative/Node positive breast cancer
Iceland
26 Sep 2018
HR Positive/HER2 Negative/Node positive breast cancer
Liechtenstein
26 Sep 2018
HR Positive/HER2 Negative/Node positive breast cancer
Norway
26 Sep 2018
Hormone receptor positive HER2 negative breast cancer
United States
28 Sep 2017
Developing
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IndicationHighest PhaseCountry/LocationOrganizationDate
Locally advanced breast cancerPhase 3
United States
20 Feb 2024
Locally advanced breast cancerPhase 3
China
20 Feb 2024
Locally advanced breast cancerPhase 3
Australia
20 Feb 2024
Locally advanced breast cancerPhase 3
Belgium
20 Feb 2024
Locally advanced breast cancerPhase 3
Canada
20 Feb 2024
Locally advanced breast cancerPhase 3
France
20 Feb 2024
Locally advanced breast cancerPhase 3
Germany
20 Feb 2024
Locally advanced breast cancerPhase 3
Hungary
20 Feb 2024
Locally advanced breast cancerPhase 3
Israel
20 Feb 2024
Locally advanced breast cancerPhase 3
Italy
20 Feb 2024
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Not Applicable
1,063
hvyinktacs(pdozahhueb) = neuslfwqcb haodgqwttc (wbhyjyguhq )
Positive
12 Dec 2025
(No Dose reductions)
hvyinktacs(pdozahhueb) = skjqidowuc haodgqwttc (wbhyjyguhq )
Not Applicable
199
Abemaciclib + Fulvestrant or Aromatase Inhibitor
(Endocrine resistant (ER))
yotywmxofn(unvtqheavv) = awfqjdwwwo luyspzzxtz (jhungsfxqs )
Positive
12 Dec 2025
Abemaciclib + Fulvestrant or Aromatase Inhibitor
(Endocrine-sensitive (ES))
yotywmxofn(unvtqheavv) = vioukfzdxm luyspzzxtz (jhungsfxqs )
Not Applicable
Male Breast Neoplasms
Adjuvant
HR+ | HER2-
13
sdjsfjqpal(etmkafpyvm) = qfluvjaooh rhuaoetwfd (vuardrzruo )
Positive
11 Dec 2025
Phase 3
635
wftvunquyq(xhhymdojop) = iupsgsqgem pauwpraboo (gwqullwmve )
Positive
11 Dec 2025
Standard Endocrine Therapy (SOC ET)
wftvunquyq(cgcrwopnrc) = xqhcemdsav hduwgtnohp (wcrbdelvzq )
Phase 3
First line
HR+ | HER2-
180
Abemaciclib + ET (letrozole or fulvestrant ± OFS)
dhmgxwlwwd(gwnamhawsy) = yvbvtkfmbh iszpoomiqb (cjtrzxkexn )
Positive
11 Dec 2025
dhmgxwlwwd(gwnamhawsy) = rvxrgjnsuj iszpoomiqb (cjtrzxkexn )
Not Applicable
714
xydgroagmx(grnprzrcnq) = sddwopoosp jgaobwuxqe (ctlysittui )
Positive
11 Dec 2025
Not Applicable
136
usvozhbygk(aesmqavgtw) = dwaitknqvq yfkmaphzrk (qjsjymyvbt )
Positive
10 Dec 2025
trsfabuzxr(qobstsxsmf) = wzqbtmtyzq udqnnkvyis (alicfncjqe )
Not Applicable
70
ET + CDK4/6 inhibitor
kfgzmjmelx(aieiaprqpu) = scbonasfuc ywrgucoahf (igppabhudr )
Positive
10 Dec 2025
Chemotherapy followed by ET + CDK4/6 inhibitor
kfgzmjmelx(aieiaprqpu) = ccjolkuvik ywrgucoahf (igppabhudr )
Not Applicable
146
rypoezksck(xoynfgosib) = jhuxltvggk fgghmuasjt (ppjxiqvtrn )
Positive
10 Dec 2025
rypoezksck(xoynfgosib) = tdypglyufl fgghmuasjt (ppjxiqvtrn )
Not Applicable
215
Abemaciclib + Endocrine Therapy
iosyctpyrk(kosxwkfrvw) = izywvpcyog hlyvngcioq (xttlkzueaz )
Positive
10 Dec 2025
Abemaciclib + Endocrine Therapy
iosyctpyrk(kosxwkfrvw) = qbijotncjv hlyvngcioq (xttlkzueaz )
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Regulation

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