Drug interactions
Hyoscyamine spray + Quetiapine
Severity: Moderate
Hyoscyamine spray and Quetiapine: 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 or sublingual spray is absorbed systemically and adds to the anticholinergic effects of quetiapine. This may cause dry mouth, constipation, urinary retention and confusion.
What this interaction means in plain words
Hyoscyamine spray and Quetiapine 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
Monitor for anticholinergic effects and cognitive changes, especially in older adults, and use the lowest effective dose.
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 Quetiapine
- Adagrasib + Quetiapine Major
- Amiodarone + Quetiapine Major
- Amisulpride + Quetiapine Major
- Amoxapine + Quetiapine Major
- Anagrelide + Quetiapine Major
- Apalutamide + Quetiapine Major
Frequently asked questions
Can I take Hyoscyamine spray with Quetiapine?
MediHelp rates the interaction as moderate. Hyoscyamine spray and Quetiapine 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 or sublingual spray is absorbed systemically and adds to the anticholinergic effects of quetiapine. This may cause dry mouth, constipation, urinary retention and confusion.
How serious is the interaction between Hyoscyamine spray and Quetiapine?
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 effects and cognitive changes, especially in older adults, and use the lowest effective dose.
What other medicines interact with Quetiapine?
MediHelp also lists interactions of Quetiapine with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Quetiapine page.
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