Interactions médicamenteuses
Erythromycin base + Tolterodine
Gravité: Majeure
Erythromycin base and Tolterodine: major interaction.
Dernière mise à jour
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Résumé
Erythromycin inhibits CYP3A4 and can raise tolterodine levels, particularly in CYP2D6 poor metabolizers. Both drugs can prolong the QT interval, so arrhythmia risk is also increased.
Ce que signifie cette interaction, en termes simples
Erythromycin base and Tolterodine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Pourquoi elle survient
CYP3A4 inhibition reduces tolterodine clearance, with additive QT prolongation.
Conduite à tenir
Limit tolterodine to 2 mg daily and monitor ECG if the combination is needed, or use a non-interacting antibiotic such as azithromycin with caution.
Questions à poser à votre pharmacien
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Autres interactions de Tolterodine
Questions fréquentes
Can I take Erythromycin base with Tolterodine?
MediHelp rates the interaction as major. Erythromycin base and Tolterodine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Erythromycin inhibits CYP3A4 and can raise tolterodine levels, particularly in CYP2D6 poor metabolizers. Both drugs can prolong the QT interval, so arrhythmia risk is also increased.
How serious is the interaction between Erythromycin base and Tolterodine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Limit tolterodine to 2 mg daily and monitor ECG if the combination is needed, or use a non-interacting antibiotic such as azithromycin with caution.
What other medicines interact with Tolterodine?
MediHelp also lists interactions of Tolterodine with, for example, Clarithromycin, Clozapine, Cobicistat. The full list is on the Tolterodine page.
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Ouvrez le référentiel complet, vérifiez les interactions entre plusieurs médicaments et utilisez les outils de posologie dans l'application MediHelp.
