Drug interactions
Enzalutamide + Rifapentine
Severity: Major
Enzalutamide and Rifapentine: major interaction.
Last updated Sources: US FDA label
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
Rifapentine induces CYP3A4 and CYP2C8 and can reduce enzalutamide exposure. This may lead to decreased anticancer effect.
What this interaction means in plain words
Enzalutamide and Rifapentine 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.
Enzalutamide belongs to Endocrine; Rifapentine belongs to Anti Bacterial.
Why it happens
Rifapentine induces CYP3A4/CYP2C8, accelerating enzalutamide metabolism.
What to do
Prefer an alternative antimycobacterial regimen if possible. If unavoidable, consider increasing enzalutamide from 160 mg to 240 mg daily and revert after stopping the inducer.
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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References
Other interactions of Enzalutamide
- Doravirine + Enzalutamide Contraindicated
- Elbasvir / grazoprevir + Enzalutamide Contraindicated
- Ensitrelvir + Enzalutamide Contraindicated
- Enzalutamide + Fostemsavir Contraindicated
- Enzalutamide + Isavuconazonium Contraindicated
- Enzalutamide + Lenacapavir Contraindicated
Other interactions of Rifapentine
- Ledipasvir-sofosbuvir + Rifapentine Contraindicated
- Lorlatinib + Rifapentine Contraindicated
- Lurasidone + Rifapentine Contraindicated
- Ranolazine + Rifapentine Contraindicated
- Rifapentine + Sofosbuvir-velpatasvir Contraindicated
- Rifapentine + Sofosbuvir-velpatasvir-voxilaprevir Contraindicated
Frequently asked questions
Can I take Enzalutamide with Rifapentine?
MediHelp rates the interaction as major. Enzalutamide and Rifapentine 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. Rifapentine induces CYP3A4 and CYP2C8 and can reduce enzalutamide exposure. This may lead to decreased anticancer effect.
How serious is the interaction between Enzalutamide and Rifapentine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Prefer an alternative antimycobacterial regimen if possible. If unavoidable, consider increasing enzalutamide from 160 mg to 240 mg daily and revert after stopping the inducer.
What other medicines interact with Enzalutamide?
MediHelp also lists interactions of Enzalutamide with, for example, Doravirine, Elbasvir / grazoprevir, Ensitrelvir. The full list is on the Enzalutamide page.
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