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Interactions médicamenteuses

Cimetidine + Citalopram

Gravité: Majeure

Cimetidine and Citalopram: major interaction.

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Résumé

Cimetidine raises citalopram concentrations, increasing the risk of QT prolongation and serotonergic adverse effects. Labeling advises a lower maximum citalopram dose with CYP2C19 inhibitors.

Ce que signifie cette interaction, en termes simples

Cimetidine and Citalopram 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.

Cimetidine belongs to Gastrointestinal Tract; Citalopram belongs to Central Nervous System.

Niveau de preuve: High

Pourquoi elle survient

Cimetidine inhibits CYP2C19 and CYP3A4, reducing citalopram metabolism.

Conduite à tenir

Limit citalopram to 20 mg daily and consider ECG monitoring, especially with other QT risks. Use famotidine as an alternative acid suppressant.

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?

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

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Questions fréquentes

Can I take Cimetidine with Citalopram?

MediHelp rates the interaction as major. Cimetidine and Citalopram 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. Cimetidine raises citalopram concentrations, increasing the risk of QT prolongation and serotonergic adverse effects. Labeling advises a lower maximum citalopram dose with CYP2C19 inhibitors.

How serious is the interaction between Cimetidine and Citalopram?

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 citalopram to 20 mg daily and consider ECG monitoring, especially with other QT risks. Use famotidine as an alternative acid suppressant.

What other medicines interact with Cimetidine?

MediHelp also lists interactions of Cimetidine with, for example, Dofetilide, Fezolinetant, Alfentanil. The full list is on the Cimetidine 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.

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