Drug interactions
Protriptyline + Tiotropium-olodaterol
Severity: Moderate
Protriptyline 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
Protriptyline is a tricyclic antidepressant with strong anticholinergic activity and QT-prolonging potential. With tiotropium and olodaterol it may increase anticholinergic effects and heighten cardiovascular effects including tachycardia and arrhythmia.
What this interaction means in plain words
Protriptyline 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 antimuscarinic effects, plus additive QT prolongation and adrenergic cardiac stimulation.
What to do
Monitor heart rate, ECG in at-risk patients and anticholinergic symptoms. Use caution to avoid other QT-prolonging drugs and correct hypokalemia.
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 Protriptyline with Tiotropium-olodaterol?
MediHelp rates the interaction as moderate. Protriptyline 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. Protriptyline is a tricyclic antidepressant with strong anticholinergic activity and QT-prolonging potential. With tiotropium and olodaterol it may increase anticholinergic effects and heighten cardiovascular effects including tachycardia and arrhythmia.
How serious is the interaction between Protriptyline 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: Monitor heart rate, ECG in at-risk patients and anticholinergic symptoms. Use caution to avoid other QT-prolonging drugs and correct hypokalemia.
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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