Question 1

What is Palbociclib used for?

Accepted Answer

Palbociclib (brand name Ibrance) is a CDK4/6 Inhibitor indicated for HR+/HER2- Metastatic Breast Cancer.

Question 2

How does Palbociclib work?

Accepted Answer

Palbociclib works through the following mechanism: Selective inhibitor of CDK4 and CDK6, blocking retinoblastoma protein phosphorylation and preventing G1-to-S cell cycle progression..

Question 3

What are the most common side effects of Palbociclib?

Accepted Answer

Reported side effects vary by individual. The side-effects section on this page lists the events most frequently reported to FDA FAERS for Palbociclib. FAERS is voluntary reporting, so it reflects what was reported, not absolute incidence.

Question 4

Is Palbociclib the same as Ibrance?

Accepted Answer

Ibrance is a brand name for Palbociclib. They share the same active ingredient and FDA-approved indications. Biosimilars and authorised generics may differ in inactive ingredients such as buffers or preservatives.

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