Drug interactions
Ruxolitinib + Saquinavir
Severity: Major
Ruxolitinib and Saquinavir: 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
Saquinavir inhibits CYP3A4 and may increase ruxolitinib levels. Greater exposure can worsen myelosuppression and infection risk.
What this interaction means in plain words
Ruxolitinib 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
Inhibition of CYP3A4-mediated metabolism of ruxolitinib reduces its clearance.
What to do
Reduce the ruxolitinib dose per labeling for strong CYP3A4 inhibitors or use an alternative antiretroviral. Monitor blood counts frequently.
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 Ruxolitinib
Frequently asked questions
Can I take Ruxolitinib with Saquinavir?
MediHelp rates the interaction as major. Ruxolitinib 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 inhibits CYP3A4 and may increase ruxolitinib levels. Greater exposure can worsen myelosuppression and infection risk.
How serious is the interaction between Ruxolitinib 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: Reduce the ruxolitinib dose per labeling for strong CYP3A4 inhibitors or use an alternative antiretroviral. Monitor blood counts frequently.
What other medicines interact with Ruxolitinib?
MediHelp also lists interactions of Ruxolitinib with, for example, Atazanavir, Ceritinib, Chloramphenicol. The full list is on the Ruxolitinib page.
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