Drug interactions
Carbamazepine + Lenacapavir
Severity: Contraindicated
Carbamazepine and Lenacapavir: contraindicated 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 P-glycoprotein, expected to substantially lower lenacapavir exposure. This risks loss of virologic response and resistance. Labeling contraindicates strong inducers.
What this interaction means in plain words
Carbamazepine and Lenacapavir are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Carbamazepine belongs to Central Nervous System; Lenacapavir belongs to Anti Virals.
Why it happens
Carbamazepine induces CYP3A4 and P-glycoprotein, increasing lenacapavir clearance.
What to do
Do not coadminister; use an alternative anticonvulsant.
What to ask your pharmacist
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Carbamazepine and Lenacapavir, 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 Lenacapavir
- Apalutamide + Lenacapavir Contraindicated
- Enzalutamide + Lenacapavir Contraindicated
- Flibanserin + Lenacapavir Contraindicated
- Lenacapavir + Phenytoin Contraindicated
- Lenacapavir + Rifampicin Contraindicated
- Amobarbital + Lenacapavir Major
Frequently asked questions
Can I take Carbamazepine with Lenacapavir?
MediHelp rates the interaction as contraindicated. Carbamazepine and Lenacapavir are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Carbamazepine strongly induces CYP3A4 and P-glycoprotein, expected to substantially lower lenacapavir exposure. This risks loss of virologic response and resistance. Labeling contraindicates strong inducers.
How serious is the interaction between Carbamazepine and Lenacapavir?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not coadminister; use an alternative anticonvulsant.
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.
