Drug interactions
Betibeglogene autotemcel + Efavirenz
Severity: Major
Betibeglogene autotemcel and Efavirenz: 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
Antiretrovirals have the potential to interfere with the ex vivo manufacturing of gene-modified cells because the product uses a lentiviral vector. Efavirenz present during stem cell mobilization and apheresis could compromise the quality of the harvested cells.
What this interaction means in plain words
Betibeglogene autotemcel and Efavirenz 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.
Why it happens
Antiretroviral drugs inhibit lentiviral vector transduction during manufacture of the gene therapy product.
What to do
Stop efavirenz and other antiretrovirals at least one month before mobilization, or for the time needed for drug elimination, and keep them stopped until all apheresis cycles are finished. Plan an alternative HIV management strategy with the treating specialist.
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 Efavirenz
- Cobimetinib + Efavirenz Contraindicated
- Dienogest / estradiol valerate + Efavirenz Contraindicated
- Dihydroergotamine intranasal + Efavirenz Contraindicated
- Dihydroergotamine + Efavirenz Contraindicated
- Doravirine + Efavirenz Contraindicated
- Efavirenz + Elbasvir / grazoprevir Contraindicated
Frequently asked questions
Can I take Betibeglogene autotemcel with Efavirenz?
MediHelp rates the interaction as major. Betibeglogene autotemcel and Efavirenz 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. Antiretrovirals have the potential to interfere with the ex vivo manufacturing of gene-modified cells because the product uses a lentiviral vector. Efavirenz present during stem cell mobilization and apheresis could compromise the quality of the harvested cells.
How serious is the interaction between Betibeglogene autotemcel and Efavirenz?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Stop efavirenz and other antiretrovirals at least one month before mobilization, or for the time needed for drug elimination, and keep them stopped until all apheresis cycles are finished. Plan an alternative HIV management strategy with the treating specialist.
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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