Drug interactions
Lenacapavir + Rifampicin
Severity: Contraindicated
Lenacapavir and Rifampicin: 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
Rifampicin substantially lowers lenacapavir concentrations. Subtherapeutic levels may cause loss of virologic suppression and selection of resistance.
What this interaction means in plain words
Lenacapavir and Rifampicin 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.
Lenacapavir belongs to Anti Virals; Rifampicin belongs to Anti Bacterial.
Why it happens
Rifampicin is a strong inducer of CYP3A and P-gp, increasing lenacapavir clearance.
What to do
Do not coadminister. Use an alternative antimycobacterial such as rifabutin only after checking current labeling, or select another HIV regimen.
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?
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Other interactions of Lenacapavir
- Apalutamide + Lenacapavir Contraindicated
- Carbamazepine + Lenacapavir Contraindicated
- Enzalutamide + Lenacapavir Contraindicated
- Flibanserin + Lenacapavir Contraindicated
- Lenacapavir + Phenytoin Contraindicated
- Amobarbital + Lenacapavir Major
Other interactions of Rifampicin
- Cabotegravir + Rifampicin Contraindicated
- Delamanid + Rifampicin Contraindicated
- Doravirine + Rifampicin Contraindicated
- Ensitrelvir + Rifampicin Contraindicated
- Fostemsavir + Rifampicin Contraindicated
- Isavuconazole + Rifampicin Contraindicated
Frequently asked questions
Can I take Lenacapavir with Rifampicin?
MediHelp rates the interaction as contraindicated. Lenacapavir and Rifampicin 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. Rifampicin substantially lowers lenacapavir concentrations. Subtherapeutic levels may cause loss of virologic suppression and selection of resistance.
How serious is the interaction between Lenacapavir and Rifampicin?
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 antimycobacterial such as rifabutin only after checking current labeling, or select another HIV regimen.
What other medicines interact with Lenacapavir?
MediHelp also lists interactions of Lenacapavir with, for example, Apalutamide, Carbamazepine, Enzalutamide. The full list is on the Lenacapavir page.
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