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Interactions médicamenteuses

Gefitinib + Omeprazole

Gravité: Majeure

Gefitinib and Omeprazole: major interaction.

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Résumé

Gefitinib absorption depends on gastric acidity, and raising gastric pH substantially lowers its exposure. This may reduce anti-tumour efficacy.

Ce que signifie cette interaction, en termes simples

Gefitinib and Omeprazole 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.

Gefitinib belongs to Oncology; Omeprazole belongs to Gastrointestinal Tract.

Niveau de preuve: High

Pourquoi elle survient

Omeprazole raises gastric pH, decreasing gefitinib solubility and absorption.

Conduite à tenir

Avoid PPIs if possible. If one is needed, take gefitinib 12 hours after the PPI dose, though H2 antagonists or antacids with timed separation are preferable.

Questions à poser à votre pharmacien

  • 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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Questions fréquentes

Can I take Gefitinib with Omeprazole?

MediHelp rates the interaction as major. Gefitinib and Omeprazole 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. Gefitinib absorption depends on gastric acidity, and raising gastric pH substantially lowers its exposure. This may reduce anti-tumour efficacy.

How serious is the interaction between Gefitinib and Omeprazole?

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 PPIs if possible. If one is needed, take gefitinib 12 hours after the PPI dose, though H2 antagonists or antacids with timed separation are preferable.

What other medicines interact with Omeprazole?

MediHelp also lists interactions of Omeprazole with, for example, Mavacamten, Rilpivirine, Acalabrutinib. The full list is on the Omeprazole page.

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Ouvrez le référentiel complet, vérifiez les interactions entre plusieurs médicaments et utilisez les outils de posologie dans l'application MediHelp.

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