Does Dexlansoprazole Interact with Erlotinib?
Dexlansoprazole and Erlotinib have a moderate drug interaction according to U.S. FDA drug labeling data. Dexlansoprazole can reduce the absorption of erlotinib due to its effect on gastric pH. The mechanism involves ppi-induced gastric ph increase reducing drug-dependent absorption. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.
- Severity
- Moderate
- Dexlansoprazole Class
- Proton Pump Inhibitor
- Erlotinib Class
- Kinase Inhibitor
- Management
- Monitor for effects
- Data Source
- U.S. FDA via OpenFDA
How This Interaction Works
The interaction between Dexlansoprazole and Erlotinib occurs because ppi-induced gastric ph increase reducing drug-dependent absorption. Clinically, this means dexlansoprazole can reduce the absorption of erlotinib due to its effect on gastric ph. This is classified as a moderate interaction. While it may not require stopping either medication, your healthcare provider should be aware you are taking both so they can monitor for potential effects and adjust treatment if necessary.
What To Tell Your Doctor or Pharmacist
If you are taking Dexlansoprazole and your doctor is considering prescribing Erlotinib (or vice versa), make sure to:
- Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
- Ask whether the benefits of combining these medications outweigh the risks for your specific situation
- Ask what symptoms to watch for that would indicate the interaction is causing problems
- Ask whether any dosage adjustments are needed
- Never stop or change either medication without first consulting your healthcare provider