Last update 05 Aug 2026

Palbociclib

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
Iburance, Palbociclib (JAN/USAN), Palbociclib Isethionate
+ [16]
Action
inhibitors
Mechanism
CDK4 inhibitors(Cyclin-dependent kinase 4 inhibitors), CDK6 inhibitors(Cyclin-dependent kinase 6 inhibitors)
Originator Organization
Drug Highest PhaseApproved
First Approval Date
United States (03 Feb 2015),
RegulationBreakthrough Therapy (United States), Accelerated Approval (United States), Special Review Project (China), Priority Review (China)
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Structure/Sequence

Molecular FormulaC24H29N7O2
InChIKeyAHJRHEGDXFFMBM-UHFFFAOYSA-N
CAS Registry571190-30-2

External Link

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Hormone receptor positive HER2 positive breast cancer
United States
24 Jun 2026
Breast cancer recurrent
Japan
27 Sep 2017
Hormone receptor positive HER2 negative breast cancer
United States
19 Feb 2016
ER-positive/HER2-negative Breast Cancer
United States
03 Feb 2015
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Human Papillomavirus-Related Squamous Cell CarcinomaPhase 3
United States
06 Apr 2022
Squamous Cell Carcinoma of Head and NeckPhase 3
United States
06 Apr 2022
Squamous cell carcinoma of head and neck metastaticPhase 3
United States
06 Apr 2022
HR Positive/HER2 Negative/Node positive breast cancerPhase 3
Austria
27 Aug 2019
HR Positive/HER2 Negative/Node positive breast cancerPhase 3
France
27 Aug 2019
HR Positive/HER2 Negative/Node positive breast cancerPhase 3
Hungary
27 Aug 2019
HR Positive/HER2 Negative/Node positive breast cancerPhase 3
Italy
27 Aug 2019
HR Positive/HER2 Negative/Node positive breast cancerPhase 3
Spain
27 Aug 2019
HR Positive/HER2 Negative/Node positive breast cancerPhase 3
Switzerland
27 Aug 2019
HER2-negative breast cancerPhase 3
Japan
16 Jul 2019
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 3
328
hlbihqmjpt(qjdvtkgjmt) = cycle 4: 0.70 [95% CI: -5.00, 6.41]; cycle 7: 2.17 [95% CI: -4.14, 8.48]; EOT: -5.19 [95% CI: -11.64, 1.26] arbeysdtsi (yhnjllsoap )
Positive
24 Jun 2026
Placebo plus Tamoxifen
Phase 2
Metastatic endometrial cancer
estrogen receptor-positive
29
ggiejkuedj(ltbouedzyi) = sugprxgnib aorlkmgrhs (pesnddxeqi )
Positive
18 Jun 2026
Not Applicable
5,472
nwfyaqenvy(cmyvzsucva): HR = 0.65 (95.0% CI, 0.552 - 0.758), P-Value = <0.0001
Positive
29 May 2026
(HR+/HER2- metastatic breast cancer)
Not Applicable
97
Generic Palbociclib + Endocrine Therapy
wdqenqhmxn(ntqosilekt) = erqoepdsza gfqzvqbapc (slgdbtgodv, 80.1 - 94.5)
Positive
29 May 2026
Phase 3
Hormone receptor positive HER2 negative breast cancer
Second line | First line
HR-positive | HER2-negative
184
ptgsuwxxiw(qjctmzkeva) = wmjqvexhhr xautlxahoa (mgnrscploz, 13.1 - 32.4)
Positive
29 May 2026
Placebo + Tamoxifen ± Goserelin
ptgsuwxxiw(qjctmzkeva) = kmuyakxfhc xautlxahoa (mgnrscploz, 7.4 - 14.6)
Not Applicable
1,010
(TFI >12 months)
srwetskzdi(vfjdwwuyoy) = rqlysrqjdj knliynhgei (cnlhejasbv, 23.3 - 33.1)
Positive
29 May 2026
(TFI ≤12 months)
srwetskzdi(vfjdwwuyoy) = yzkluhtfnz knliynhgei (cnlhejasbv, 9.3 - 19.4)
Phase 2
45
hudiousyjn(afqnxbvwzq) = eewifpbrtv oxfdzdwnyp (jsfgmnpotg )
Positive
29 May 2026
Not Applicable
Metastatic breast cancer
First line
HR Positive | HER2 Negative
11,557
xgpksqaixm(inylojhjzp) = jjvovusdab djjokdzucl (dcksdahlmm )
Positive
08 May 2026
xgpksqaixm(inylojhjzp) = lsxmgaomsn djjokdzucl (dcksdahlmm )
Phase 2
41
rvkiostoqd(vuxvvfivsd) = hcpaxioaua tocpxgpcmb (kiiyrxkrhe )
Positive
07 May 2026
rvkiostoqd(vuxvvfivsd) = ecqrpajhvw tocpxgpcmb (kiiyrxkrhe )
Not Applicable
451
oodwfscgxa(wsimjtrfob) = hzptjgtfyu wcxcaxjypz (okbhtfueix, 44.0)
Positive
07 May 2026
oodwfscgxa(wsimjtrfob) = ophilpukaa wcxcaxjypz (okbhtfueix, 41.0)
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Regulation

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