Drug interactions
Carbamazepine + Lemborexant
Severity: Major
Carbamazepine and Lemborexant: 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
Strong CYP3A4 induction by carbamazepine substantially lowers lemborexant exposure, likely making it ineffective for insomnia.
What this interaction means in plain words
Carbamazepine and Lemborexant 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; Lemborexant belongs to Central Nervous System.
Why it happens
Carbamazepine induces CYP3A4, which is the main pathway of lemborexant metabolism.
What to do
Avoid co-use and consider another hypnotic not dependent on CYP3A4. Labeling advises against use with strong or moderate 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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Carbamazepine and Lemborexant, 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 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 Lemborexant
Frequently asked questions
Can I take Carbamazepine with Lemborexant?
MediHelp rates the interaction as major. Carbamazepine and Lemborexant 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. Strong CYP3A4 induction by carbamazepine substantially lowers lemborexant exposure, likely making it ineffective for insomnia.
How serious is the interaction between Carbamazepine and Lemborexant?
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 co-use and consider another hypnotic not dependent on CYP3A4. Labeling advises against use with strong or moderate CYP3A inducers.
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.
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.
