Drug interactions
Protriptyline + Tiotropium
Severity: Moderate
Protriptyline 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
Protriptyline is a tricyclic antidepressant with significant anticholinergic effects, which add to those of tiotropium. Patients may experience dry mouth, constipation, urinary retention, tachycardia and confusion, especially if elderly.
What this interaction means in plain words
Protriptyline 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.
Why it happens
Additive antimuscarinic effects at muscarinic receptors.
What to do
Monitor for anticholinergic adverse effects and take care in glaucoma, prostatic hypertrophy or cognitive impairment. Consider a less anticholinergic antidepressant if problems develop.
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
Frequently asked questions
Can I take Protriptyline with Tiotropium?
MediHelp rates the interaction as moderate. Protriptyline 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. Protriptyline is a tricyclic antidepressant with significant anticholinergic effects, which add to those of tiotropium. Patients may experience dry mouth, constipation, urinary retention, tachycardia and confusion, especially if elderly.
How serious is the interaction between Protriptyline 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 for anticholinergic adverse effects and take care in glaucoma, prostatic hypertrophy or cognitive impairment. Consider a less anticholinergic antidepressant if problems develop.
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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