Drug interactions
Pentobarbital + Regorafenib
Severity: Major
Pentobarbital and Regorafenib: 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
Pentobarbital induces CYP3A4 and may reduce regorafenib exposure, risking loss of efficacy.
What this interaction means in plain words
Pentobarbital and Regorafenib 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
Barbiturate induction of CYP3A4 accelerates regorafenib metabolism.
What to do
Avoid strong CYP3A4 inducers where possible and choose a non-inducing sedative. If unavoidable, monitor 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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Pentobarbital and Regorafenib, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Regorafenib
Frequently asked questions
Can I take Pentobarbital with Regorafenib?
MediHelp rates the interaction as major. Pentobarbital and Regorafenib 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. Pentobarbital induces CYP3A4 and may reduce regorafenib exposure, risking loss of efficacy.
How serious is the interaction between Pentobarbital and Regorafenib?
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 strong CYP3A4 inducers where possible and choose a non-inducing sedative. If unavoidable, monitor for reduced response.
What other medicines interact with Regorafenib?
MediHelp also lists interactions of Regorafenib with, for example, Apalutamide, Atazanavir, Carbamazepine. The full list is on the Regorafenib page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
