相互作用
Atazanavir + Sildenafil
重症度: 併用禁忌
Atazanavir and Sildenafil: contraindicated interaction.
最終更新日
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概要
Atazanavir inhibits CYP3A4 and can markedly raise sildenafil exposure, increasing the risk of hypotension, syncope, visual disturbances and priapism. With the higher, chronic dosing used for pulmonary arterial hypertension the risk is unacceptable.
この相互作用をわかりやすく説明すると
Atazanavir and Sildenafil 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.
Atazanavir belongs to Anti Virals; Sildenafil belongs to Genitourinary.
なぜ起こるのか
Atazanavir inhibits CYP3A4-mediated first-pass and hepatic metabolism of sildenafil, raising its plasma concentrations.
対処法
Do not combine atazanavir with sildenafil for pulmonary arterial hypertension. For erectile dysfunction, use a reduced sildenafil dose (for example 25 mg no more often than every 48 hours) and counsel on hypotension and priapism.
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?
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、AtazanavirとSildenafil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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Sildenafilのその他の相互作用
Atazanavirのその他の相互作用
よくある質問
Can I take Atazanavir with Sildenafil?
MediHelp rates the interaction as contraindicated. Atazanavir and Sildenafil 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. Atazanavir inhibits CYP3A4 and can markedly raise sildenafil exposure, increasing the risk of hypotension, syncope, visual disturbances and priapism. With the higher, chronic dosing used for pulmonary arterial hypertension the risk is unacceptable.
How serious is the interaction between Atazanavir and Sildenafil?
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 atazanavir with sildenafil for pulmonary arterial hypertension. For erectile dysfunction, use a reduced sildenafil dose (for example 25 mg no more often than every 48 hours) and counsel on hypotension and priapism.
What other medicines interact with Sildenafil?
MediHelp also lists interactions of Sildenafil with, for example, Amyl nitrite, Cobicistat, Elvitegravir / cobicistat / emtricitabine / tenofovir df. The full list is on the Sildenafil 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。
