Drug interactions
Darunavir + Topotecan
Severity: Major
Darunavir and Topotecan: 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
Darunavir, usually boosted with ritonavir or cobicistat, inhibits P-gp and may increase topotecan exposure. This may worsen myelosuppression.
What this interaction means in plain words
Darunavir and Topotecan 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.
Darunavir belongs to Anti Virals; Topotecan belongs to Oncology.
Why it happens
Darunavir and its booster inhibit P-gp (and potentially BCRP) efflux of topotecan.
What to do
Avoid with oral topotecan. With IV topotecan, monitor blood counts and consider dose reduction.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Darunavir and Topotecan, 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 Topotecan
- Adenovirus types 4 and 7 live + Topotecan Contraindicated
- Amiodarone + Topotecan Major
- Cisplatin + Topotecan Major
- Cobicistat + Topotecan Major
- Cyclosporine + Topotecan Major
- Cyclosporin + Topotecan Major
Other interactions of Darunavir
- Alfuzosin + Darunavir Contraindicated
- Avanafil + Darunavir Contraindicated
- Darunavir + Dronedarone Contraindicated
- Darunavir + Eletriptan Contraindicated
- Darunavir + Ergotamine Contraindicated
- Darunavir + Flibanserin Contraindicated
Frequently asked questions
Can I take Darunavir with Topotecan?
MediHelp rates the interaction as major. Darunavir and Topotecan 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. Darunavir, usually boosted with ritonavir or cobicistat, inhibits P-gp and may increase topotecan exposure. This may worsen myelosuppression.
How serious is the interaction between Darunavir and Topotecan?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid with oral topotecan. With IV topotecan, monitor blood counts and consider dose reduction.
What other medicines interact with Topotecan?
MediHelp also lists interactions of Topotecan with, for example, Adenovirus types 4 and 7 live, Amiodarone, Cisplatin. The full list is on the Topotecan 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.
