Drug interactions
Chloramphenicol + Darifenacin
Severity: Moderate
Chloramphenicol and Darifenacin: 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
Chloramphenicol can inhibit CYP3A4 and may raise darifenacin levels. This could increase anticholinergic effects such as dry mouth, constipation and urinary retention.
What this interaction means in plain words
Chloramphenicol and Darifenacin 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.
Chloramphenicol belongs to Anti Bacterial; Darifenacin belongs to Genitourinary.
Why it happens
Inhibition of CYP3A4 metabolism of darifenacin by chloramphenicol.
What to do
Monitor for anticholinergic adverse effects and keep darifenacin at 7.5 mg daily if toxicity appears. Consider an alternative antibiotic if it is feasible.
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 Darifenacin
Other interactions of Chloramphenicol
Frequently asked questions
Can I take Chloramphenicol with Darifenacin?
MediHelp rates the interaction as moderate. Chloramphenicol and Darifenacin 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. Chloramphenicol can inhibit CYP3A4 and may raise darifenacin levels. This could increase anticholinergic effects such as dry mouth, constipation and urinary retention.
How serious is the interaction between Chloramphenicol and Darifenacin?
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 adverse effects and keep darifenacin at 7.5 mg daily if toxicity appears. Consider an alternative antibiotic if it is feasible.
What other medicines interact with Darifenacin?
MediHelp also lists interactions of Darifenacin with, for example, Atazanavir, Bethanechol, Clarithromycin. The full list is on the Darifenacin page.
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