Does Modafinil Interact with Omeprazole?
The modafinil label names omeprazole among CYP2C19 substrates whose elimination may slow and exposure may increase during coadministration.
Label evidence and limitations
Named-drug label evidence. The label discusses possible clinician-directed dose adjustment. An omeprazole study elsewhere in this label used armodafinil; its numerical result should not be attributed to a modafinil study.
Product scope: Oral modafinil tablets.
Read the DailyMed label: These highlights do not include all the information needed to use MODAFINIL TABLETS safely and effectively. See full prescribing information for MODAFINIL TABLETS. MODAFINIL tablets, for oral use, C-IV Initial U.S. Approval: 1998
Section: 7 Drug Interactions — CYP2C19 substrates. Compared version 14, label date 2026-09-03. The linked label may be updated after this comparison.
The original record has no saved label identifier. This comparison uses a label located during the source check; it does not recover the original extraction source.
AI-assisted source comparison dated 2026-10-16. This is a comparison of label text, not independent clinical review or an individual safety assessment. CDI's stored severity category is not an FDA-assigned rating. Confirm your exact medicines and formulations with your pharmacist or prescriber before changing treatment.
- Stored CDI classification
- Moderate
- Modafinil Class
- Sympathomimetic-like Agent
- Omeprazole Class
- Proton Pump Inhibitor
- Management
- Confirm exact products with your pharmacist
- Data Source
- Product label via NLM DailyMed
What To Tell Your Doctor or Pharmacist
If you are taking Modafinil and your doctor is considering prescribing Omeprazole (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
- Never stop or change either medication without first consulting your healthcare provider