相互作用
Alfentanil + Cimetidine
重症度: 重大
Alfentanil and Cimetidine: major interaction.
最終更新日
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概要
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.
この相互作用をわかりやすく説明すると
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.
なぜ起こるのか
Cimetidine inhibits CYP3A4-mediated metabolism of alfentanil.
対処法
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.
薬剤師に尋ねること
- 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?
Pro+会員向け
ページ全体を見る
アカウントを作成してPro+トライアルを始めると、AlfentanilとCimetidineの臨床対応の詳細なアドバイス、追加の注記、エビデンスの詳細、処方全体を対象とした相互作用チェッカーを利用できます。
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
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Cimetidineのその他の相互作用
よくある質問
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.
完全なモノグラフ、用量、相互作用チェッカーはMediHelpアプリで
MediHelpアプリで、完全なリファレンスを開き、複数薬剤の相互作用をチェックし、用量ツールを利用できます。
