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Interações medicamentosas

Belzutifan + Ethinyl estradiol-levonorgestrel

Gravidade: Grave

Belzutifan and Ethinyl estradiol-levonorgestrel: major interaction.

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Para profissionais de saúde — apenas referência. Esta página é um resumo breve, não é aconselhamento médico nem substitui a bula oficial ou o julgamento clínico. Verifique sempre antes de prescrever ou dispensar.

O conteúdo clínico desta página está disponível apenas em inglês.

Resumo

Belzutifan induces CYP3A4 and can reduce hormonal contraceptive exposure, leading to contraceptive failure or breakthrough bleeding. Belzutifan is teratogenic, so pregnancy prevention is critical.

O que esta interação significa em palavras simples

Belzutifan and Ethinyl estradiol-levonorgestrel 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.

Belzutifan belongs to Miscellaneous; Ethinyl estradiol-levonorgestrel belongs to Endocrine.

Nível de evidência: Moderate

Por que acontece

CYP3A4 induction by belzutifan increases metabolism of ethinyl estradiol and levonorgestrel.

O que fazer

Use an effective nonhormonal contraceptive during treatment and for the period in labeling after the last dose. Do not rely on hormonal methods alone.

O que perguntar ao farmacêutico

  • 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?

Bring a full list of your medicines, including over-the-counter products, supplements and herbal remedies, to every pharmacy visit.

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Perguntas frequentes

Can I take Belzutifan with Ethinyl estradiol-levonorgestrel?

MediHelp rates the interaction as major. Belzutifan and Ethinyl estradiol-levonorgestrel 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. Belzutifan induces CYP3A4 and can reduce hormonal contraceptive exposure, leading to contraceptive failure or breakthrough bleeding. Belzutifan is teratogenic, so pregnancy prevention is critical.

How serious is the interaction between Belzutifan and Ethinyl estradiol-levonorgestrel?

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 an effective nonhormonal contraceptive during treatment and for the period in labeling after the last dose. Do not rely on hormonal methods alone.

What other medicines interact with Ethinyl estradiol-levonorgestrel?

MediHelp also lists interactions of Ethinyl estradiol-levonorgestrel with, for example, Fezolinetant, Ombitasvir / paritaprevir / ritonavir and dasabuvir, Tranexamic acid. The full list is on the Ethinyl estradiol-levonorgestrel page.

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