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Interazioni tra farmaci

Mexiletine + Pimozide

Gravità: Controindicata

Mexiletine and Pimozide: contraindicated interaction.

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Sintesi

Mexiletine is a class IB antiarrhythmic with proarrhythmic potential and is metabolized by CYP2D6 and CYP1A2, while pimozide strongly prolongs QT. Combined use raises the risk of torsades de pointes and ventricular arrhythmias.

Cosa significa questa interazione in parole semplici

Mexiletine and Pimozide are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.

Mexiletine belongs to Cardiovascular; Pimozide belongs to Central Nervous System.

Livello di evidenza: Low

Perché avviene

Additive proarrhythmic and QT-prolonging effects.

Cosa fare

Avoid the combination and select an alternative antiarrhythmic or antipsychotic. Obtain an ECG if exposure has occurred.

Cosa chiedere al farmacista

  • Is there an alternative to one of these two medicines for me?
  • If both are essential, who is monitoring me and how often?
  • Which symptoms mean I should stop and seek help straight away?

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

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Domande frequenti

Can I take Mexiletine with Pimozide?

MediHelp rates the interaction as contraindicated. Mexiletine and Pimozide are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Mexiletine is a class IB antiarrhythmic with proarrhythmic potential and is metabolized by CYP2D6 and CYP1A2, while pimozide strongly prolongs QT. Combined use raises the risk of torsades de pointes and ventricular arrhythmias.

How serious is the interaction between Mexiletine and Pimozide?

MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination and select an alternative antiarrhythmic or antipsychotic. Obtain an ECG if exposure has occurred.

What other medicines interact with Mexiletine?

MediHelp also lists interactions of Mexiletine with, for example, Fezolinetant, Alosetron, Amiodarone. The full list is on the Mexiletine page.

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