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Interações medicamentosas

Amoxapine + Donepezil

Gravidade: Grave

Amoxapine and Donepezil: major interaction.

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Resumo

Donepezil has a known risk of QT prolongation and torsades de pointes, and amoxapine, a tricyclic-related antidepressant, can also prolong the QT interval. Combined use may raise arrhythmia risk, especially with electrolyte disturbance or cardiac disease. Amoxapine's anticholinergic activity may also oppose donepezil's cholinergic benefit.

O que esta interação significa em palavras simples

Amoxapine and 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.

Nível de evidência: Moderate

Por que acontece

Additive QT prolongation, plus pharmacodynamic opposition of cholinesterase inhibition by antimuscarinic effects.

O que fazer

Avoid the combination where possible; if used, obtain a baseline ECG, correct potassium and magnesium, and monitor the QTc. Consider an antidepressant with less QT and anticholinergic liability.

O que perguntar ao farmacêutico

  • 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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Perguntas frequentes

Can I take Amoxapine with Donepezil?

MediHelp rates the interaction as major. Amoxapine and 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. Donepezil has a known risk of QT prolongation and torsades de pointes, and amoxapine, a tricyclic-related antidepressant, can also prolong the QT interval. Combined use may raise arrhythmia risk, especially with electrolyte disturbance or cardiac disease. Amoxapine's anticholinergic activity may also oppose donepezil's cholinergic benefit.

How serious is the interaction between Amoxapine and 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 the combination where possible; if used, obtain a baseline ECG, correct potassium and magnesium, and monitor the QTc. Consider an antidepressant with less QT and anticholinergic liability.

What other medicines interact with Donepezil?

MediHelp also lists interactions of Donepezil with, for example, Dronedarone, Pimozide, Thioridazine. The full list is on the Donepezil page.

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