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Drug interactions

Flavoxate + Imipramine

Severity: Moderate

Flavoxate and Imipramine: 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

Imipramine is a tricyclic antidepressant with marked anticholinergic effects. With flavoxate it may cause additive dry mouth, constipation, urinary retention, blurred vision, tachycardia and confusion.

What this interaction means in plain words

Flavoxate and Imipramine 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.

Flavoxate belongs to Genitourinary; Imipramine belongs to Central Nervous System.

Evidence level: Moderate

Why it happens

Additive antimuscarinic pharmacodynamic effects.

What to do

Monitor for urinary retention, constipation and cognitive effects. Consider a less anticholinergic antidepressant if symptoms develop.

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?

Bring a full list of your medicines, including over-the-counter products, supplements and herbal remedies, to every pharmacy visit.

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Frequently asked questions

Can I take Flavoxate with Imipramine?

MediHelp rates the interaction as moderate. Flavoxate and Imipramine 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. Imipramine is a tricyclic antidepressant with marked anticholinergic effects. With flavoxate it may cause additive dry mouth, constipation, urinary retention, blurred vision, tachycardia and confusion.

How serious is the interaction between Flavoxate and Imipramine?

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 urinary retention, constipation and cognitive effects. Consider a less anticholinergic antidepressant if symptoms develop.

What other medicines interact with Flavoxate?

MediHelp also lists interactions of Flavoxate with, for example, Clozapine, Abobotulinumtoxina, Aclidinium. The full list is on the Flavoxate page.

Full monographs, dosing and an interaction checker in the MediHelp app

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