Drug interactions
Docetaxel + Saquinavir
Severity: Major
Docetaxel and Saquinavir: 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
Saquinavir, given with ritonavir boosting in practice, inhibits CYP3A4 and can raise docetaxel concentrations. Higher exposure may worsen myelosuppression, mucositis and neurotoxicity.
What this interaction means in plain words
Docetaxel and Saquinavir 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
Saquinavir inhibits CYP3A4-mediated metabolism of docetaxel, decreasing its clearance.
What to do
Avoid concurrent use if possible; otherwise monitor blood counts and toxicity closely and consider docetaxel 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 Docetaxel and Saquinavir, 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 7 days on the web. No card needed.
References
Other interactions of Docetaxel
Frequently asked questions
Can I take Docetaxel with Saquinavir?
MediHelp rates the interaction as major. Docetaxel and Saquinavir 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. Saquinavir, given with ritonavir boosting in practice, inhibits CYP3A4 and can raise docetaxel concentrations. Higher exposure may worsen myelosuppression, mucositis and neurotoxicity.
How serious is the interaction between Docetaxel and Saquinavir?
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 concurrent use if possible; otherwise monitor blood counts and toxicity closely and consider docetaxel dose reduction.
What other medicines interact with Docetaxel?
MediHelp also lists interactions of Docetaxel with, for example, Adenovirus types 4 and 7 live, Atazanavir, Belatacept. The full list is on the Docetaxel 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.
