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Interações medicamentosas

Cimetidine + Neratinib

Gravidade: Grave

Cimetidine and Neratinib: 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.

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Resumo

Neratinib solubility falls as pH rises, and H2 antagonists reduce its absorption. This may reduce efficacy in breast cancer treatment.

O que esta interação significa em palavras simples

Cimetidine and Neratinib 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.

Cimetidine belongs to Gastrointestinal Tract; Neratinib belongs to Oncology.

Nível de evidência: Moderate

Por que acontece

Cimetidine raises gastric pH, decreasing neratinib dissolution and absorption.

O que fazer

Avoid H2 antagonists if possible; if needed, take neratinib at least 2 hours before the next H2 antagonist dose and at least 10 hours after the previous one.

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 Cimetidine with Neratinib?

MediHelp rates the interaction as major. Cimetidine and Neratinib 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. Neratinib solubility falls as pH rises, and H2 antagonists reduce its absorption. This may reduce efficacy in breast cancer treatment.

How serious is the interaction between Cimetidine and Neratinib?

MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid H2 antagonists if possible; if needed, take neratinib at least 2 hours before the next H2 antagonist dose and at least 10 hours after the previous one.

What other medicines interact with Cimetidine?

MediHelp also lists interactions of Cimetidine with, for example, Dofetilide, Fezolinetant, Alfentanil. The full list is on the Cimetidine page.

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