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Interazioni tra farmaci

Gefitinib + Omeprazole

Gravità: Maggiore

Gefitinib and Omeprazole: major interaction.

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Sintesi

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

Cosa significa questa interazione in parole semplici

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.

Livello di evidenza: High

Perché avviene

Omeprazole raises gastric pH, decreasing gefitinib solubility and absorption.

Cosa fare

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.

Cosa chiedere al farmacista

  • 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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Domande frequenti

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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