Drug interactions
Fingolimod + Saquinavir
Severity: Major
Fingolimod 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, usually boosted with ritonavir, prolongs QT and PR intervals, and fingolimod causes bradycardia and QT effects. Together the risk of serious arrhythmia increases, and ritonavir-related CYP inhibition may raise fingolimod exposure.
What this interaction means in plain words
Fingolimod 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
Additive QTc prolongation with fingolimod bradycardia; possible increased fingolimod exposure from CYP inhibition.
What to do
Avoid if possible. If combined, obtain a baseline ECG, correct electrolytes and monitor ECG and heart rate.
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 Fingolimod
- Adenovirus types 4 and 7 live + Fingolimod Contraindicated
- Bcg vaccine live + Fingolimod Contraindicated
- Fingolimod + Pimozide Contraindicated
- Fingolimod + Ponesimod Contraindicated
- Fingolimod + Quinidine Contraindicated
- Fingolimod + Siponimod Contraindicated
Frequently asked questions
Can I take Fingolimod with Saquinavir?
MediHelp rates the interaction as major. Fingolimod 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, usually boosted with ritonavir, prolongs QT and PR intervals, and fingolimod causes bradycardia and QT effects. Together the risk of serious arrhythmia increases, and ritonavir-related CYP inhibition may raise fingolimod exposure.
How serious is the interaction between Fingolimod 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. If combined, obtain a baseline ECG, correct electrolytes and monitor ECG and heart rate.
What other medicines interact with Fingolimod?
MediHelp also lists interactions of Fingolimod with, for example, Adenovirus types 4 and 7 live, Bcg vaccine live, Pimozide. The full list is on the Fingolimod page.
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