Drug interactions
Hyoscyamine spray + Scopolamine
Severity: Moderate
Hyoscyamine spray 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
Hyoscyamine spray is absorbed through the oral mucosa and has systemic antimuscarinic effects, which add to those of scopolamine. Combined use may cause dry mouth, constipation, urinary retention, tachycardia and confusion.
What this interaction means in plain words
Hyoscyamine spray 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 duplicate anticholinergic therapy, and monitor for anticholinergic toxicity if both are required.
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 Hyoscyamine spray with Scopolamine?
MediHelp rates the interaction as moderate. Hyoscyamine spray 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. Hyoscyamine spray is absorbed through the oral mucosa and has systemic antimuscarinic effects, which add to those of scopolamine. Combined use may cause dry mouth, constipation, urinary retention, tachycardia and confusion.
How serious is the interaction between Hyoscyamine spray 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 duplicate anticholinergic therapy, and monitor for anticholinergic toxicity if both are required.
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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