Drug interactions
Amitriptyline + Hyoscyamine spray
Severity: Moderate
Amitriptyline and Hyoscyamine spray: 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 amitriptyline's anticholinergic burden. This may cause dry mouth, constipation, urinary retention, blurred vision and confusion.
What this interaction means in plain words
Amitriptyline and Hyoscyamine spray 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
Use the lowest effective doses and monitor for anticholinergic toxicity. Avoid in elderly patients, glaucoma, or urinary obstruction.
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 Hyoscyamine spray?
MediHelp rates the interaction as moderate. Amitriptyline and Hyoscyamine spray 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 amitriptyline's anticholinergic burden. This may cause dry mouth, constipation, urinary retention, blurred vision and confusion.
How serious is the interaction between Amitriptyline and Hyoscyamine spray?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use the lowest effective doses and monitor for anticholinergic toxicity. Avoid in elderly patients, glaucoma, or urinary obstruction.
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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