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Interações medicamentosas

Doravirine + Efavirenz

Gravidade: Contraindicada

Doravirine and Efavirenz: contraindicated 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.

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Resumo

Efavirenz lowers doravirine concentrations, risking loss of virologic suppression and resistance. Both are NNRTIs and combining them offers no benefit.

O que esta interação significa em palavras simples

Doravirine and Efavirenz 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.

Doravirine belongs to Anti Virals; Efavirenz belongs to Anti Virals.

Nível de evidência: Moderate

Por que acontece

Induction of CYP3A4 metabolism of doravirine by efavirenz.

O que fazer

Do not combine; choose one NNRTI-based regimen. If switching, stop efavirenz and allow for its enzyme induction to wane, as advised in the labeling.

O que perguntar ao farmacêutico

  • 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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Perguntas frequentes

Can I take Doravirine with Efavirenz?

MediHelp rates the interaction as contraindicated. Doravirine and Efavirenz 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. Efavirenz lowers doravirine concentrations, risking loss of virologic suppression and resistance. Both are NNRTIs and combining them offers no benefit.

How serious is the interaction between Doravirine and Efavirenz?

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; choose one NNRTI-based regimen. If switching, stop efavirenz and allow for its enzyme induction to wane, as advised in the labeling.

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.

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