相互作用
Astemizole + Clarithromycin
重症度: 併用禁忌
Astemizole and Clarithromycin: contraindicated interaction.
最終更新日 出典: US FDA label
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概要
Clarithromycin raises astemizole concentrations and, together with the intrinsic QT effect of both drugs, may cause torsades de pointes and sudden death. The combination is contraindicated. Astemizole has been withdrawn in many markets, so the interaction is mainly of historical relevance.
この相互作用をわかりやすく説明すると
Astemizole and Clarithromycin 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.
なぜ起こるのか
Clarithromycin inhibits CYP3A4-mediated metabolism of astemizole and also prolongs QT through IKr blockade, giving pharmacokinetic and pharmacodynamic synergy.
対処法
Do not combine. Use a non-sedating antihistamine without QT liability, such as fexofenadine, loratadine or cetirizine.
薬剤師に尋ねること
- 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?
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アカウントを作成してPro+トライアルを始めると、AstemizoleとClarithromycin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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参考文献
Clarithromycinのその他の相互作用
よくある質問
Can I take Astemizole with Clarithromycin?
MediHelp rates the interaction as contraindicated. Astemizole and Clarithromycin 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. Clarithromycin raises astemizole concentrations and, together with the intrinsic QT effect of both drugs, may cause torsades de pointes and sudden death. The combination is contraindicated. Astemizole has been withdrawn in many markets, so the interaction is mainly of historical relevance.
How serious is the interaction between Astemizole and Clarithromycin?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not combine. Use a non-sedating antihistamine without QT liability, such as fexofenadine, loratadine or cetirizine.
What other medicines interact with Clarithromycin?
MediHelp also lists interactions of Clarithromycin with, for example, Avanafil, Cisapride, Colchicine. The full list is on the Clarithromycin 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。
