藥物交互作用
Efavirenz + Ivacaftor
嚴重程度: 嚴重
Efavirenz and Ivacaftor: major interaction.
最後更新
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摘要
Efavirenz can lower ivacaftor concentrations enough to reduce CFTR potentiation and clinical efficacy. Ivacaftor is a weak CYP3A inhibitor and may modestly raise efavirenz exposure, but the induction effect on ivacaftor is the main concern.
用白話說明這項交互作用的意義
Efavirenz and Ivacaftor 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.
Efavirenz belongs to Anti Virals; Ivacaftor belongs to Miscellaneous.
為什麼會發生
Efavirenz induces CYP3A4, accelerating ivacaftor metabolism; ivacaftor weakly inhibits CYP3A.
處置方式
Avoid combining ivacaftor with strong CYP3A inducers where possible and consider an alternative antiretroviral. Monitor respiratory status and CF response if used together.
可向藥師詢問的問題
- 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?
Efavirenz 的其他交互作用
Ivacaftor 的其他交互作用
常見問題
Can I take Efavirenz with Ivacaftor?
MediHelp rates the interaction as major. Efavirenz and Ivacaftor 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. Efavirenz can lower ivacaftor concentrations enough to reduce CFTR potentiation and clinical efficacy. Ivacaftor is a weak CYP3A inhibitor and may modestly raise efavirenz exposure, but the induction effect on ivacaftor is the main concern.
How serious is the interaction between Efavirenz and Ivacaftor?
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 combining ivacaftor with strong CYP3A inducers where possible and consider an alternative antiretroviral. Monitor respiratory status and CF response if used together.
What other medicines interact with Efavirenz?
MediHelp also lists interactions of Efavirenz with, for example, Cobimetinib, Dienogest / estradiol valerate, Dihydroergotamine intranasal. The full list is on the Efavirenz 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。
