Drug interactions
Palbociclib + Rifampin
Severity: Major
Palbociclib and Rifampin: major 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
Rifampin is a strong CYP3A inducer and markedly reduces exposure to palbociclib. This can lead to subtherapeutic levels and reduced efficacy in cancer treatment.
What this interaction means in plain words
Palbociclib and Rifampin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Rifampin induces CYP3A4 (and related enzymes and transporters), increasing palbociclib metabolism.
What to do
Avoid concurrent use and consider an alternative antimicrobial when possible. Palbociclib labeling recommends avoiding strong CYP3A inducers.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Palbociclib
Frequently asked questions
Can I take Palbociclib with Rifampin?
MediHelp rates the interaction as major. Palbociclib and Rifampin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Rifampin is a strong CYP3A inducer and markedly reduces exposure to palbociclib. This can lead to subtherapeutic levels and reduced efficacy in cancer treatment.
How serious is the interaction between Palbociclib and Rifampin?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid concurrent use and consider an alternative antimicrobial when possible. Palbociclib labeling recommends avoiding strong CYP3A inducers.
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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