Drug interactions
Chlorpheniramine + Zotepine
Severity: Moderate
Chlorpheniramine 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 anticholinergic properties, and combining it with chlorpheniramine increases drowsiness and anticholinergic effects. Zotepine also lowers the seizure threshold, so excess CNS effects deserve attention.
What this interaction means in plain words
Chlorpheniramine 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 anticholinergic effects from H1 blockade and multi-receptor antagonism.
What to do
Monitor for oversedation, confusion and anticholinergic effects, and reduce doses if they occur. Advise against driving.
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 Chlorpheniramine
Frequently asked questions
Can I take Chlorpheniramine with Zotepine?
MediHelp rates the interaction as moderate. Chlorpheniramine 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 anticholinergic properties, and combining it with chlorpheniramine increases drowsiness and anticholinergic effects. Zotepine also lowers the seizure threshold, so excess CNS effects deserve attention.
How serious is the interaction between Chlorpheniramine 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: Monitor for oversedation, confusion and anticholinergic effects, and reduce doses if they occur. Advise against driving.
What other medicines interact with Chlorpheniramine?
MediHelp also lists interactions of Chlorpheniramine with, for example, Belladonna and opium, Benzhydrocodone / acetaminophen, Brexanolone. The full list is on the Chlorpheniramine page.
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