Palbociclib and Trastuzumab interaction
Palbociclib and Trastuzumab: the Palbociclib prescribing label mentions this combination without an instruction to avoid it or change the dose.
Minor
Mentioned, no instruction to avoid. Worth knowing; rarely a reason to change anything on its own.
What the FDA labels say
From the Palbociclib (Ibrance) label · effective 2026-07-02
Minor
Grade ≥3 neutropenia was reported in 61% of patients receiving IBRANCE in combination with trastuzumab, with or without pertuzumab, and endocrine therapy.
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Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.