Drug interactions
Imatinib + Saquinavir
Severity: Major
Imatinib 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 can increase imatinib exposure, raising the risk of dose-related adverse effects. Imatinib may in turn raise saquinavir levels. Both may affect cardiac conduction.
What this interaction means in plain words
Imatinib 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
Mutual CYP3A4 inhibition reduces clearance of both drugs.
What to do
Avoid if possible; otherwise reduce the imatinib dose and monitor blood counts, liver function, fluid retention and ECG.
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 Imatinib
- Imatinib + Lomitapide Contraindicated
- Imatinib + Lonafarnib Contraindicated
- Amobarbital + Imatinib Major
- Apalutamide + Imatinib Major
- Avapritinib + Imatinib Major
- Benzhydrocodone / acetaminophen + Imatinib Major
Frequently asked questions
Can I take Imatinib with Saquinavir?
MediHelp rates the interaction as major. Imatinib 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 can increase imatinib exposure, raising the risk of dose-related adverse effects. Imatinib may in turn raise saquinavir levels. Both may affect cardiac conduction.
How serious is the interaction between Imatinib 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 if possible; otherwise reduce the imatinib dose and monitor blood counts, liver function, fluid retention and ECG.
What other medicines interact with Imatinib?
MediHelp also lists interactions of Imatinib with, for example, Lomitapide, Lonafarnib, Amobarbital. The full list is on the Imatinib page.
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