相互作用
Efavirenz + Etonogestrel
重症度: 重大
Efavirenz and Etonogestrel: major interaction.
最終更新日
医療従事者向け・参照専用。このページは簡潔な要約であり、医学的助言ではなく、公式の添付文書や臨床判断に代わるものではありません。処方・調剤の前に必ず確認してください。
このページの臨床コンテンツは英語でのみ提供されています。
概要
Efavirenz may reduce etonogestrel exposure from implants, with a risk of contraceptive failure.
この相互作用をわかりやすく説明すると
Efavirenz and Etonogestrel 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; Etonogestrel belongs to Endocrine.
なぜ起こるのか
Efavirenz induces CYP3A4, accelerating etonogestrel metabolism.
対処法
Advise an additional barrier method or use an alternative contraceptive such as a copper IUD or DMPA while on efavirenz and for a period after stopping.
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、EfavirenzとEtonogestrel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
WebでPro+を14日間無料でお試し。カード登録不要。
Efavirenzのその他の相互作用
Etonogestrelのその他の相互作用
よくある質問
Can I take Efavirenz with Etonogestrel?
MediHelp rates the interaction as major. Efavirenz and Etonogestrel 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 may reduce etonogestrel exposure from implants, with a risk of contraceptive failure.
How serious is the interaction between Efavirenz and Etonogestrel?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Advise an additional barrier method or use an alternative contraceptive such as a copper IUD or DMPA while on efavirenz and for a period after stopping.
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.
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。
