Drug interactions
Oxybutynin transdermal + Scopolamine
Severity: Moderate
Oxybutynin transdermal and Scopolamine: 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
Transdermal oxybutynin delivers systemic antimuscarinic exposure, which adds to the effects of scopolamine. This may cause dry mouth, constipation, urinary retention, blurred vision, tachycardia and confusion.
What this interaction means in plain words
Oxybutynin transdermal and Scopolamine 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
Avoid using two anticholinergic patches at once if possible, and monitor for anticholinergic toxicity, particularly in older adults.
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 Scopolamine
Frequently asked questions
Can I take Oxybutynin transdermal with Scopolamine?
MediHelp rates the interaction as moderate. Oxybutynin transdermal and Scopolamine 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. Transdermal oxybutynin delivers systemic antimuscarinic exposure, which adds to the effects of scopolamine. This may cause dry mouth, constipation, urinary retention, blurred vision, tachycardia and confusion.
How serious is the interaction between Oxybutynin transdermal and Scopolamine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid using two anticholinergic patches at once if possible, and monitor for anticholinergic toxicity, particularly in older adults.
What other medicines interact with Scopolamine?
MediHelp also lists interactions of Scopolamine with, for example, Benzhydrocodone / acetaminophen, Buprenorphine long-acting, Buprenorphine subdermal implant. The full list is on the Scopolamine page.
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