Drug interactions
Doxylamine + Zotepine
Severity: Moderate
Doxylamine and Zotepine: 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
Zotepine is a sedating antipsychotic with notable antihistaminic and anticholinergic activity, and doxylamine adds to both effects. The combination can cause pronounced drowsiness and anticholinergic effects, and zotepine also lowers the seizure threshold.
What this interaction means in plain words
Doxylamine and Zotepine 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 CNS depression and antimuscarinic effects through H1 and muscarinic receptor blockade.
What to do
Avoid unnecessary doxylamine use in patients on zotepine and monitor for oversedation, confusion and anticholinergic effects. Use extra caution in older patients and those with epilepsy.
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 Doxylamine
Frequently asked questions
Can I take Doxylamine with Zotepine?
MediHelp rates the interaction as moderate. Doxylamine and Zotepine 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. Zotepine is a sedating antipsychotic with notable antihistaminic and anticholinergic activity, and doxylamine adds to both effects. The combination can cause pronounced drowsiness and anticholinergic effects, and zotepine also lowers the seizure threshold.
How serious is the interaction between Doxylamine and Zotepine?
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 unnecessary doxylamine use in patients on zotepine and monitor for oversedation, confusion and anticholinergic effects. Use extra caution in older patients and those with epilepsy.
What other medicines interact with Doxylamine?
MediHelp also lists interactions of Doxylamine with, for example, Belladonna and opium, Benzhydrocodone / acetaminophen, Brexanolone. The full list is on the Doxylamine page.
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