Drug interactions
Nortriptyline + Trospium chloride
Severity: Moderate
Nortriptyline and Trospium chloride: 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
Both agents have antimuscarinic activity, so together they can produce additive anticholinergic effects such as dry mouth, constipation, urinary retention, blurred vision and tachycardia. Older patients are at greater risk of confusion.
What this interaction means in plain words
Nortriptyline and Trospium chloride 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 antagonism of muscarinic receptors.
What to do
Monitor for anticholinergic adverse effects, including urinary retention and constipation, and reduce doses or choose an alternative if they develop. Avoid in patients with narrow-angle glaucoma or obstructive uropathy.
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 Nortriptyline
- Disopyramide + Nortriptyline Contraindicated
- Dofetilide + Nortriptyline Contraindicated
- Dronedarone + Nortriptyline Contraindicated
- Ibutilide + Nortriptyline Contraindicated
- Isocarboxazid + Nortriptyline Contraindicated
- Methylene blue + Nortriptyline Contraindicated
Frequently asked questions
Can I take Nortriptyline with Trospium chloride?
MediHelp rates the interaction as moderate. Nortriptyline and Trospium chloride 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. Both agents have antimuscarinic activity, so together they can produce additive anticholinergic effects such as dry mouth, constipation, urinary retention, blurred vision and tachycardia. Older patients are at greater risk of confusion.
How serious is the interaction between Nortriptyline and Trospium chloride?
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, including urinary retention and constipation, and reduce doses or choose an alternative if they develop. Avoid in patients with narrow-angle glaucoma or obstructive uropathy.
What other medicines interact with Nortriptyline?
MediHelp also lists interactions of Nortriptyline with, for example, Disopyramide, Dofetilide, Dronedarone. The full list is on the Nortriptyline page.
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