藥物交互作用
Alfentanil + Cimetidine
嚴重程度: 嚴重
Alfentanil and Cimetidine: major interaction.
最後更新
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本頁的臨床內容僅提供英文版。
摘要
Cimetidine inhibits hepatic CYP3A4 and reduces alfentanil clearance, resulting in higher and prolonged opioid effect. This can cause deeper or longer respiratory depression and sedation.
用白話說明這項交互作用的意義
Alfentanil and Cimetidine 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.
為什麼會發生
Cimetidine inhibits CYP3A4-mediated metabolism of alfentanil.
處置方式
Reduce the alfentanil dose and titrate to effect, with monitoring of respiratory rate and sedation for longer than usual. Consider an H2 blocker without CYP inhibition, such as famotidine.
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?
Cimetidine 的其他交互作用
常見問題
Can I take Alfentanil with Cimetidine?
MediHelp rates the interaction as major. Alfentanil and Cimetidine 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. Cimetidine inhibits hepatic CYP3A4 and reduces alfentanil clearance, resulting in higher and prolonged opioid effect. This can cause deeper or longer respiratory depression and sedation.
How serious is the interaction between Alfentanil and Cimetidine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Reduce the alfentanil dose and titrate to effect, with monitoring of respiratory rate and sedation for longer than usual. Consider an H2 blocker without CYP inhibition, such as famotidine.
What other medicines interact with Cimetidine?
MediHelp also lists interactions of Cimetidine with, for example, Dofetilide, Fezolinetant, Atazanavir. The full list is on the Cimetidine page.
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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。
