Drug interactions
Darifenacin + Pentobarbital
Severity: Moderate
Darifenacin and Pentobarbital: 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
Pentobarbital induces CYP3A4 and may lower darifenacin concentrations, reducing its effect on overactive bladder symptoms.
What this interaction means in plain words
Darifenacin and Pentobarbital 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
Barbiturate induction of CYP3A4 increases darifenacin clearance.
What to do
Monitor for reduced symptom control and adjust the darifenacin dose or switch agents if needed. Reassess after the barbiturate is stopped.
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
Frequently asked questions
Can I take Darifenacin with Pentobarbital?
MediHelp rates the interaction as moderate. Darifenacin and Pentobarbital 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. Pentobarbital induces CYP3A4 and may lower darifenacin concentrations, reducing its effect on overactive bladder symptoms.
How serious is the interaction between Darifenacin and Pentobarbital?
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 reduced symptom control and adjust the darifenacin dose or switch agents if needed. Reassess after the barbiturate is stopped.
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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