Drug interactions
Hyoscyamine spray + Imipramine
Severity: Moderate
Hyoscyamine spray and Imipramine: 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
Oral or sublingual hyoscyamine spray is absorbed systemically and adds antimuscarinic load to imipramine. This can produce dry mouth, constipation, urinary retention, blurred vision, tachycardia and cognitive impairment, particularly in older patients.
What this interaction means in plain words
Hyoscyamine spray and Imipramine 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 use the lowest effective hyoscyamine dose. Consider alternatives in older patients or those with glaucoma, urinary retention or ileus risk.
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 Imipramine
- Dronedarone + Imipramine Contraindicated
- Imipramine + Isocarboxazid Contraindicated
- Imipramine + Phenelzine Contraindicated
- Imipramine + Pimozide Contraindicated
- Imipramine + Rasagiline Contraindicated
- Imipramine + Safinamide Contraindicated
Frequently asked questions
Can I take Hyoscyamine spray with Imipramine?
MediHelp rates the interaction as moderate. Hyoscyamine spray and Imipramine 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. Oral or sublingual hyoscyamine spray is absorbed systemically and adds antimuscarinic load to imipramine. This can produce dry mouth, constipation, urinary retention, blurred vision, tachycardia and cognitive impairment, particularly in older patients.
How serious is the interaction between Hyoscyamine spray and Imipramine?
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 use the lowest effective hyoscyamine dose. Consider alternatives in older patients or those with glaucoma, urinary retention or ileus risk.
What other medicines interact with Imipramine?
MediHelp also lists interactions of Imipramine with, for example, Dronedarone, Isocarboxazid, Phenelzine. The full list is on the Imipramine page.
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