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Interactions médicamenteuses

Amitriptyline + Memantine-donepezil

Gravité: Majeure

Amitriptyline and Memantine-donepezil: major interaction.

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Résumé

Amitriptyline has strong anticholinergic activity that directly opposes the cholinergic effect of donepezil, potentially reducing dementia benefit and worsening cognition. Both drugs can also prolong the QT interval.

Ce que signifie cette interaction, en termes simples

Amitriptyline and Memantine-donepezil 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.

Amitriptyline belongs to Central Nervous System; Memantine-donepezil belongs to Central Nervous System.

Niveau de preuve: Moderate

Pourquoi elle survient

Anticholinergic antagonism of cholinesterase inhibition, plus additive QT prolongation.

Conduite à tenir

Avoid amitriptyline in dementia patients if possible and choose a less anticholinergic alternative. If used, monitor cognition and ECG.

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 Amitriptyline with Memantine-donepezil?

MediHelp rates the interaction as major. Amitriptyline and Memantine-donepezil 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. Amitriptyline has strong anticholinergic activity that directly opposes the cholinergic effect of donepezil, potentially reducing dementia benefit and worsening cognition. Both drugs can also prolong the QT interval.

How serious is the interaction between Amitriptyline and Memantine-donepezil?

MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid amitriptyline in dementia patients if possible and choose a less anticholinergic alternative. If used, monitor cognition and ECG.

What other medicines interact with Memantine-donepezil?

MediHelp also lists interactions of Memantine-donepezil with, for example, Dronedarone, Thioridazine, Amantadine. The full list is on the Memantine-donepezil 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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