藥物交互作用

Lapatinib + Pimozide

嚴重程度: 禁忌併用

Lapatinib and Pimozide: contraindicated interaction.

最後更新 12 十月 2026

僅供醫療專業人員參考。本頁為簡要摘要，並非醫療建議，亦不能取代官方仿單或臨床判斷。開立處方或調劑前請務必核實。

本頁的臨床內容僅提供英文版。

摘要

Lapatinib prolongs the QT interval and inhibits CYP3A4, which contributes to pimozide metabolism. Higher pimozide levels plus additive QT effects raise the risk of torsades de pointes.

用白話說明這項交互作用的意義

Lapatinib 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.

Lapatinib belongs to Oncology; Pimozide belongs to Central Nervous System.

證據等級: Moderate

為什麼會發生

Additive QT prolongation plus CYP3A4 inhibition by lapatinib reducing pimozide clearance.

處置方式

Avoid the combination. Choose an alternative for Tourette's or psychosis that is not a narrow-index CYP3A substrate.

可向藥師詢問的問題

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.

Pro+ 會員專屬

解鎖完整頁面

建立帳號並開始 Pro+ 試用，即可解鎖 Lapatinib 與 Pimozide 的完整臨床處置建議、補充說明、證據詳情及整張處方的交互作用檢查工具。

Full clinical management advice
Additional notes
Evidence detail
Interaction checker for a whole prescription

建立免費帳號登入

在網頁版免費試用 Pro+ 14 天，無需信用卡。

常見問題

Can I take Lapatinib with Pimozide?

MediHelp rates the interaction as contraindicated. Lapatinib 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. Lapatinib prolongs the QT interval and inhibits CYP3A4, which contributes to pimozide metabolism. Higher pimozide levels plus additive QT effects raise the risk of torsades de pointes.

How serious is the interaction between Lapatinib 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. Choose an alternative for Tourette's or psychosis that is not a narrow-index CYP3A substrate.

What other medicines interact with Pimozide?

MediHelp also lists interactions of Pimozide with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Pimozide page.

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摘要