Palbociclib

Palbociclib, sold under the brand name Ibrance among others, is a medication developed by Pfizer for the treatment of HR-positive and HER2-negative breast cancer. It is a selective inhibitor of the cyclin-dependent kinases CDK4 and CDK6. Palbociclib was the first CDK4/6 inhibitor to be approved as a cancer therapy.

Palbociclib
Clinical data
Trade namesIbrance, others
Other namesPD-0332991
AHFS/Drugs.comMonograph
MedlinePlusa615013
License data
Pregnancy
category
  • AU: D
Routes of
administration
By mouth
ATC code
Legal status
Legal status
  • AU: S4 (Prescription only)
  • UK: POM (Prescription only)
  • US: ℞-only
Pharmacokinetic data
Bioavailability46%
Protein binding85%
MetabolismLiver (CYP3A, SULT2A1, glucuronidation)
Elimination half-life29 (±5) hours
Excretion74% feces, 18% urine
Identifiers
  • 6-Acetyl-8-cyclopentyl-5-methyl-2-{[5-(1-piperazinyl)-2-pyridinyl]amino}pyrido[2,3-d]pyrimidin-7(8H)-one
CAS Number
PubChem CID
DrugBank
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
PDB ligand
CompTox Dashboard (EPA)
ECHA InfoCard100.238.221
Chemical and physical data
FormulaC24H29N7O2
Molar mass447.543 g·mol−1
3D model (JSmol)
  • O=C2N(c1nc(ncc1/C(=C2/C(=O)C)C)Nc3ncc(cc3)N4CCNCC4)C5CCCC5
  • InChI=1S/C24H29N7O2/c1-15-19-14-27-24(28-20-8-7-18(13-26-20)30-11-9-25-10-12-30)29-22(19)31(17-5-3-4-6-17)23(33)21(15)16(2)32/h7-8,13-14,17,25H,3-6,9-12H2,1-2H3,(H,26,27,28,29)
  • Key:AHJRHEGDXFFMBM-UHFFFAOYSA-N
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