Drug interactions
Saquinavir + Tiotropium-olodaterol
Severity: Moderate
Saquinavir and Tiotropium-olodaterol: moderate 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 prolongs the QT and PR intervals and has been linked to torsades de pointes. Olodaterol may add to arrhythmic risk through tachycardia and lower potassium.
What this interaction means in plain words
Saquinavir and Tiotropium-olodaterol can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Additive QT prolongation, with possible CYP3A4 inhibition increasing olodaterol exposure.
What to do
Obtain baseline ECG and monitor QTc, and correct hypokalemia and hypomagnesemia. Avoid adding other QT-prolonging drugs.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Tiotropium-olodaterol
Frequently asked questions
Can I take Saquinavir with Tiotropium-olodaterol?
MediHelp rates the interaction as moderate. Saquinavir and Tiotropium-olodaterol can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Saquinavir prolongs the QT and PR intervals and has been linked to torsades de pointes. Olodaterol may add to arrhythmic risk through tachycardia and lower potassium.
How serious is the interaction between Saquinavir and Tiotropium-olodaterol?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain baseline ECG and monitor QTc, and correct hypokalemia and hypomagnesemia. Avoid adding other QT-prolonging drugs.
What other medicines interact with Tiotropium-olodaterol?
MediHelp also lists interactions of Tiotropium-olodaterol with, for example, Amisulpride, Arformoterol, Arsenic trioxide. The full list is on the Tiotropium-olodaterol page.
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