藥物交互作用
Atazanavir + Desogestrel-ethinyl estradiol
嚴重程度: 嚴重
Atazanavir and Desogestrel-ethinyl estradiol: major interaction.
最後更新
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摘要
Atazanavir alters ethinyl estradiol exposure, and when boosted with ritonavir can reduce it, while progestin exposure may increase. This may lead to reduced contraceptive reliability, breakthrough bleeding, or progestin-related adverse effects.
用白話說明這項交互作用的意義
Atazanavir and Desogestrel-ethinyl estradiol 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.
Atazanavir belongs to Anti Virals; Desogestrel-ethinyl estradiol belongs to Endocrine.
為什麼會發生
Atazanavir inhibits CYP3A4 and UGT1A1, while ritonavir boosting induces glucuronidation, altering ethinyl estradiol and progestin levels.
處置方式
Use a contraceptive containing at least 30 mcg ethinyl estradiol with unboosted atazanavir, or choose an alternative or additional non-hormonal method. Avoid products with less than 30 mcg ethinyl estradiol with boosted atazanavir.
可向藥師詢問的問題
- 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?
Desogestrel-ethinyl estradiol 的其他交互作用
Atazanavir 的其他交互作用
常見問題
Can I take Atazanavir with Desogestrel-ethinyl estradiol?
MediHelp rates the interaction as major. Atazanavir and Desogestrel-ethinyl estradiol 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. Atazanavir alters ethinyl estradiol exposure, and when boosted with ritonavir can reduce it, while progestin exposure may increase. This may lead to reduced contraceptive reliability, breakthrough bleeding, or progestin-related adverse effects.
How serious is the interaction between Atazanavir and Desogestrel-ethinyl estradiol?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use a contraceptive containing at least 30 mcg ethinyl estradiol with unboosted atazanavir, or choose an alternative or additional non-hormonal method. Avoid products with less than 30 mcg ethinyl estradiol with boosted atazanavir.
What other medicines interact with Desogestrel-ethinyl estradiol?
MediHelp also lists interactions of Desogestrel-ethinyl estradiol with, for example, Fezolinetant, Aminocaproic acid, Amobarbital. The full list is on the Desogestrel-ethinyl estradiol page.
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