Drug interactions
Olanzapine + Tiotropium
Severity: Moderate
Olanzapine and Tiotropium: 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
Olanzapine has moderate anticholinergic activity that may add to tiotropium's antimuscarinic effects, increasing constipation, dry mouth, urinary retention and blurred vision. Severe constipation or ileus is a concern in vulnerable patients.
What this interaction means in plain words
Olanzapine and Tiotropium 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.
Olanzapine belongs to Central Nervous System; Tiotropium belongs to Respiratory.
Why it happens
Additive antimuscarinic pharmacodynamic effects.
What to do
Monitor bowel function, urinary symptoms and ocular symptoms. Review the combined anticholinergic burden in older patients.
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
Other interactions of Olanzapine
Frequently asked questions
Can I take Olanzapine with Tiotropium?
MediHelp rates the interaction as moderate. Olanzapine and Tiotropium 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. Olanzapine has moderate anticholinergic activity that may add to tiotropium's antimuscarinic effects, increasing constipation, dry mouth, urinary retention and blurred vision. Severe constipation or ileus is a concern in vulnerable patients.
How serious is the interaction between Olanzapine and Tiotropium?
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 bowel function, urinary symptoms and ocular symptoms. Review the combined anticholinergic burden in older patients.
What other medicines interact with Tiotropium?
MediHelp also lists interactions of Tiotropium with, for example, Glycopyrrolate inhaled, Indacaterol-glycopyrronium, Revefenacin. The full list is on the Tiotropium page.
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