Drug interactions
Nafcillin + Palbociclib
Severity: Moderate
Nafcillin and Palbociclib: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Nafcillin is a CYP3A4 inducer and may lower palbociclib concentrations. Reduced exposure could diminish anticancer effect during prolonged antibiotic therapy.
What this interaction means in plain words
Nafcillin and Palbociclib can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Nafcillin induces CYP3A4, increasing the clearance of palbociclib.
What to do
Choose a non-inducing antibiotic when feasible; if nafcillin is required, monitor for reduced response and review palbociclib therapy after the course.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Palbociclib
Frequently asked questions
Can I take Nafcillin with Palbociclib?
MediHelp rates the interaction as moderate. Nafcillin and Palbociclib can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Nafcillin is a CYP3A4 inducer and may lower palbociclib concentrations. Reduced exposure could diminish anticancer effect during prolonged antibiotic therapy.
How serious is the interaction between Nafcillin and Palbociclib?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Choose a non-inducing antibiotic when feasible; if nafcillin is required, monitor for reduced response and review palbociclib therapy after the course.
What other medicines interact with Palbociclib?
MediHelp also lists interactions of Palbociclib with, for example, Apalutamide, Atazanavir, Carbamazepine. The full list is on the Palbociclib page.
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