Drug interactions
Efavirenz + Rilpivirine
Severity: Contraindicated
Efavirenz and Rilpivirine: 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
Efavirenz lowers rilpivirine concentrations, which can lead to virologic failure and NNRTI resistance. Dual NNRTI therapy has no proven benefit.
What this interaction means in plain words
Efavirenz and Rilpivirine 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.
Efavirenz belongs to Anti Virals; Rilpivirine belongs to Anti Virals.
Why it happens
Efavirenz induces CYP3A4 metabolism of rilpivirine.
What to do
Do not combine two NNRTIs; use one within a complete 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 Efavirenz
- Cobimetinib + Efavirenz Contraindicated
- Dienogest / estradiol valerate + Efavirenz Contraindicated
- Dihydroergotamine intranasal + Efavirenz Contraindicated
- Dihydroergotamine + Efavirenz Contraindicated
- Doravirine + Efavirenz Contraindicated
- Efavirenz + Elbasvir / grazoprevir Contraindicated
Other interactions of Rilpivirine
- Carbamazepine + Rilpivirine Contraindicated
- Dexamethasone + Rilpivirine Contraindicated
- Dexlansoprazole + Rilpivirine Contraindicated
- Eslicarbazepine + Rilpivirine Contraindicated
- Esomeprazole + Rilpivirine Contraindicated
- Lansoprazole + Rilpivirine Contraindicated
Frequently asked questions
Can I take Efavirenz with Rilpivirine?
MediHelp rates the interaction as contraindicated. Efavirenz and Rilpivirine 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. Efavirenz lowers rilpivirine concentrations, which can lead to virologic failure and NNRTI resistance. Dual NNRTI therapy has no proven benefit.
How serious is the interaction between Efavirenz and Rilpivirine?
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 combine two NNRTIs; use one within a complete regimen.
What other medicines interact with Efavirenz?
MediHelp also lists interactions of Efavirenz with, for example, Cobimetinib, Dienogest / estradiol valerate, Dihydroergotamine intranasal. The full list is on the Efavirenz page.
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