Drug interactions
Carbamazepine + Cobimetinib
Severity: Major
Carbamazepine and Cobimetinib: 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
Carbamazepine strongly induces CYP3A4 and is expected to markedly reduce cobimetinib exposure, compromising anticancer efficacy. Cobimetinib is a sensitive CYP3A substrate.
What this interaction means in plain words
Carbamazepine and Cobimetinib 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.
Carbamazepine belongs to Central Nervous System; Cobimetinib belongs to Oncology.
Why it happens
Carbamazepine induces CYP3A4, increasing cobimetinib clearance.
What to do
Avoid concurrent use and choose a non-inducing anticonvulsant. If unavoidable, discuss with oncology, as no validated dose increase exists.
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 Carbamazepine
- Artemether / lumefantrine + Carbamazepine Contraindicated
- Cabotegravir + Carbamazepine Contraindicated
- Carbamazepine + Delamanid Contraindicated
- Carbamazepine + Dienogest / estradiol valerate Contraindicated
- Carbamazepine + Doravirine Contraindicated
- Carbamazepine + Elbasvir / grazoprevir Contraindicated
Other interactions of Cobimetinib
- Cobimetinib + Efavirenz Contraindicated
- Cobimetinib + Posaconazole Contraindicated
- Amobarbital + Cobimetinib Major
- Apalutamide + Cobimetinib Major
- Aprepitant + Cobimetinib Major
- Bosentan + Cobimetinib Major
Frequently asked questions
Can I take Carbamazepine with Cobimetinib?
MediHelp rates the interaction as major. Carbamazepine and Cobimetinib 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. Carbamazepine strongly induces CYP3A4 and is expected to markedly reduce cobimetinib exposure, compromising anticancer efficacy. Cobimetinib is a sensitive CYP3A substrate.
How serious is the interaction between Carbamazepine and Cobimetinib?
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 choose a non-inducing anticonvulsant. If unavoidable, discuss with oncology, as no validated dose increase exists.
What other medicines interact with Carbamazepine?
MediHelp also lists interactions of Carbamazepine with, for example, Artemether / lumefantrine, Cabotegravir, Delamanid. The full list is on the Carbamazepine page.
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