Drug interactions
Brompheniramine + Thiothixene
Severity: Moderate
Brompheniramine and Thiothixene: 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
Both drugs cause sedation and have antimuscarinic activity, so combined use may increase drowsiness, confusion, dry mouth, constipation and urinary retention. Older patients are particularly susceptible.
What this interaction means in plain words
Brompheniramine and Thiothixene 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 and dopamine/muscarinic receptor blockade.
What to do
Monitor for oversedation, confusion and anticholinergic effects. Use a non-sedating antihistamine if possible.
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 Brompheniramine
Frequently asked questions
Can I take Brompheniramine with Thiothixene?
MediHelp rates the interaction as moderate. Brompheniramine and Thiothixene 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. Both drugs cause sedation and have antimuscarinic activity, so combined use may increase drowsiness, confusion, dry mouth, constipation and urinary retention. Older patients are particularly susceptible.
How serious is the interaction between Brompheniramine and Thiothixene?
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. Use a non-sedating antihistamine if possible.
What other medicines interact with Brompheniramine?
MediHelp also lists interactions of Brompheniramine with, for example, Alfentanil, Belladonna and opium, Benzhydrocodone / acetaminophen. The full list is on the Brompheniramine page.
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