Drug interactions
Cabazitaxel + Phenobarbital
Severity: Major
Cabazitaxel and Phenobarbital: 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
Phenobarbital is a CYP3A4 inducer and may lower cabazitaxel concentrations. Loss of efficacy of the chemotherapy is the concern.
What this interaction means in plain words
Cabazitaxel and Phenobarbital 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
Phenobarbital induces hepatic and intestinal CYP3A4, accelerating cabazitaxel clearance.
What to do
Avoid the combination where possible and switch to a non-enzyme-inducing anticonvulsant. If it cannot be avoided, monitor closely for reduced response.
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 Cabazitaxel
Frequently asked questions
Can I take Cabazitaxel with Phenobarbital?
MediHelp rates the interaction as major. Cabazitaxel and Phenobarbital 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. Phenobarbital is a CYP3A4 inducer and may lower cabazitaxel concentrations. Loss of efficacy of the chemotherapy is the concern.
How serious is the interaction between Cabazitaxel and Phenobarbital?
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 the combination where possible and switch to a non-enzyme-inducing anticonvulsant. If it cannot be avoided, monitor closely for reduced response.
What other medicines interact with Cabazitaxel?
MediHelp also lists interactions of Cabazitaxel with, for example, Adenovirus types 4 and 7 live, Atazanavir, Bcg intravesical live. The full list is on the Cabazitaxel page.
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