相互作用
Ivacaftor + Phenytoin
重症度: 重大
Ivacaftor and Phenytoin: major interaction.
最終更新日
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概要
Strong CYP3A4 inducers markedly reduce ivacaftor exposure, which may lead to loss of CFTR potentiation and loss of clinical benefit. Phenytoin is expected to behave similarly.
この相互作用をわかりやすく説明すると
Ivacaftor and Phenytoin 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.
Ivacaftor belongs to Miscellaneous; Phenytoin belongs to Central Nervous System.
なぜ起こるのか
Phenytoin induces CYP3A4, greatly increasing ivacaftor metabolism.
対処法
Avoid coadministration and choose a non-inducing antiseizure drug. Monitor lung function if it cannot be avoided.
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、IvacaftorとPhenytoin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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Phenytoinのその他の相互作用
Ivacaftorのその他の相互作用
よくある質問
Can I take Ivacaftor with Phenytoin?
MediHelp rates the interaction as major. Ivacaftor and Phenytoin 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. Strong CYP3A4 inducers markedly reduce ivacaftor exposure, which may lead to loss of CFTR potentiation and loss of clinical benefit. Phenytoin is expected to behave similarly.
How serious is the interaction between Ivacaftor and Phenytoin?
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 coadministration and choose a non-inducing antiseizure drug. Monitor lung function if it cannot be avoided.
What other medicines interact with Phenytoin?
MediHelp also lists interactions of Phenytoin with, for example, Artemether / lumefantrine, Bictegravir, Cabotegravir. The full list is on the Phenytoin 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。
