Drug interactions
Hyoscyamine spray + Orphenadrin
Severity: Moderate
Hyoscyamine spray and Orphenadrin: 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 given as an oral spray is absorbed systemically and adds to the antimuscarinic effects of orphenadrine. This may cause dry mouth, constipation, urinary retention, blurred vision and confusion.
What this interaction means in plain words
Hyoscyamine spray and Orphenadrin 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 pharmacodynamic effects.
What to do
Monitor for anticholinergic adverse effects and reduce doses in older patients; avoid in those with narrow-angle glaucoma or urinary retention.
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 Orphenadrin
Frequently asked questions
Can I take Hyoscyamine spray with Orphenadrin?
MediHelp rates the interaction as moderate. Hyoscyamine spray and Orphenadrin 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 given as an oral spray is absorbed systemically and adds to the antimuscarinic effects of orphenadrine. This may cause dry mouth, constipation, urinary retention, blurred vision and confusion.
How serious is the interaction between Hyoscyamine spray and Orphenadrin?
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 and reduce doses in older patients; avoid in those with narrow-angle glaucoma or urinary retention.
What other medicines interact with Orphenadrin?
MediHelp also lists interactions of Orphenadrin with, for example, Alfentanil, Amobarbital, Benzhydrocodone / acetaminophen. The full list is on the Orphenadrin page.
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