藥物交互作用
Fosphenytoin + Lorlatinib
嚴重程度: 禁忌併用
Fosphenytoin and Lorlatinib: contraindicated interaction.
最後更新
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摘要
Fosphenytoin is converted to phenytoin, a strong CYP3A4 inducer. This lowers lorlatinib exposure substantially and risks loss of efficacy and hepatotoxicity.
用白話說明這項交互作用的意義
Fosphenytoin and Lorlatinib 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.
Fosphenytoin belongs to Central Nervous System; Lorlatinib belongs to Oncology.
為什麼會發生
Phenytoin induces CYP3A4 and increases lorlatinib metabolism.
處置方式
Avoid the combination and change to a non-inducing anticonvulsant such as levetiracetam. Allow a washout period before starting lorlatinib.
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?
Lorlatinib 的其他交互作用
Fosphenytoin 的其他交互作用
常見問題
Can I take Fosphenytoin with Lorlatinib?
MediHelp rates the interaction as contraindicated. Fosphenytoin and Lorlatinib 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. Fosphenytoin is converted to phenytoin, a strong CYP3A4 inducer. This lowers lorlatinib exposure substantially and risks loss of efficacy and hepatotoxicity.
How serious is the interaction between Fosphenytoin and Lorlatinib?
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 change to a non-inducing anticonvulsant such as levetiracetam. Allow a washout period before starting lorlatinib.
What other medicines interact with Lorlatinib?
MediHelp also lists interactions of Lorlatinib with, for example, Amobarbital, Apalutamide, Butabarbital. The full list is on the Lorlatinib page.
在 MediHelp App 中取得完整藥品專論、劑量資訊與交互作用檢查
在 MediHelp App 中開啟完整參考資料、檢查多種藥物間的交互作用，並使用劑量工具。
