Drug interactions
Tiotropium-olodaterol + Zotepine
Severity: Moderate
Tiotropium-olodaterol and Zotepine: 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
Zotepine has substantial anticholinergic activity, so adding an antimuscarinic such as tiotropium can increase anticholinergic effects. The legacy idea that tiotropium lowers zotepine levels through reduced absorption is not well supported for an inhaled product. Zotepine also lowers seizure threshold and prolongs QT, and olodaterol may add to cardiac effects.
What this interaction means in plain words
Tiotropium-olodaterol and Zotepine 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 anticholinergic effects, with possible additive QT prolongation and hypokalemia from olodaterol.
What to do
Monitor for anticholinergic effects such as constipation, urinary retention and confusion. Check ECG and electrolytes if other QT risk factors are present.
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 Tiotropium-olodaterol with Zotepine?
MediHelp rates the interaction as moderate. Tiotropium-olodaterol and Zotepine 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. Zotepine has substantial anticholinergic activity, so adding an antimuscarinic such as tiotropium can increase anticholinergic effects. The legacy idea that tiotropium lowers zotepine levels through reduced absorption is not well supported for an inhaled product. Zotepine also lowers seizure threshold and prolongs QT, and olodaterol may add to cardiac effects.
How serious is the interaction between Tiotropium-olodaterol and Zotepine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for anticholinergic effects such as constipation, urinary retention and confusion. Check ECG and electrolytes if other QT risk factors are present.
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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