Drug interactions
Chlorpheniramine + Fexinidazole
Severity: Moderate
Chlorpheniramine and Fexinidazole: 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
Chlorpheniramine is partly metabolized by CYP3A4 and fexinidazole may inhibit this enzyme. Exposure to chlorpheniramine could rise, increasing sedation and anticholinergic effects. Fexinidazole also prolongs QT, though chlorpheniramine is not a major QT concern.
What this interaction means in plain words
Chlorpheniramine and Fexinidazole 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
Possible CYP3A4 inhibition by fexinidazole reducing chlorpheniramine clearance.
What to do
Monitor for excess sedation and anticholinergic effects, or use a non-sedating antihistamine during fexinidazole treatment.
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 Fexinidazole?
MediHelp rates the interaction as moderate. Chlorpheniramine and Fexinidazole 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. Chlorpheniramine is partly metabolized by CYP3A4 and fexinidazole may inhibit this enzyme. Exposure to chlorpheniramine could rise, increasing sedation and anticholinergic effects. Fexinidazole also prolongs QT, though chlorpheniramine is not a major QT concern.
How serious is the interaction between Chlorpheniramine and Fexinidazole?
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 excess sedation and anticholinergic effects, or use a non-sedating antihistamine during fexinidazole treatment.
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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