Drug interactions
Amitriptyline + Oxybutynin transdermal
Severity: Moderate
Amitriptyline and Oxybutynin transdermal: 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
Oxybutynin is a potent antimuscarinic and, even when given transdermally, adds to the anticholinergic burden of amitriptyline. Constipation, dry mouth, urinary retention, blurred vision, and confusion may be more pronounced.
What this interaction means in plain words
Amitriptyline and Oxybutynin transdermal 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.
What to do
Monitor for anticholinergic effects and cognitive changes, especially in older adults. Consider a less anticholinergic antidepressant if symptoms emerge.
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 Amitriptyline
- Amitriptyline + Isocarboxazid Contraindicated
- Amitriptyline + Methylene blue Contraindicated
- Amitriptyline + Phenelzine Contraindicated
- Amitriptyline + Pimozide Contraindicated
- Amitriptyline + Procarbazine Contraindicated
- Amitriptyline + Safinamide Contraindicated
Frequently asked questions
Can I take Amitriptyline with Oxybutynin transdermal?
MediHelp rates the interaction as moderate. Amitriptyline and Oxybutynin transdermal 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. Oxybutynin is a potent antimuscarinic and, even when given transdermally, adds to the anticholinergic burden of amitriptyline. Constipation, dry mouth, urinary retention, blurred vision, and confusion may be more pronounced.
How serious is the interaction between Amitriptyline and Oxybutynin transdermal?
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 and cognitive changes, especially in older adults. Consider a less anticholinergic antidepressant if symptoms emerge.
What other medicines interact with Amitriptyline?
MediHelp also lists interactions of Amitriptyline with, for example, Isocarboxazid, Methylene blue, Phenelzine. The full list is on the Amitriptyline page.
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