Does Armodafinil Interact with Omeprazole?
Armodafinil and Omeprazole have a moderate drug interaction according to U.S. FDA drug labeling data. Effects of Armodafinil Tablets on CYP2C19 Substrates: Elimination of drugs that are substrates for CYP2C19 (e.g., phenytoin, diazepam, propranolol, omeprazole, and clomipramine) may be prolonged by armodafinil tablets via inhibition of metabolic enzymes, with resultant higher systemic exposure. ( 7 ) • CYP2C19 substrates, such as omeprazole, phenytoin, and diazepam: exposure of these medications may be increased. In a clinical study, concomitant administration of armodafinil tablets 400 mg resulted in a 40% increase in exposure to omeprazole after a single oral dose (40 mg), as a result of moderate inhibition of CYP2C19 activity [see Drug Interactions (7) ]. 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
- Omeprazole Class
- Proton Pump Inhibitor
- Management
- Monitor for effects
- Data Source
- U.S. FDA via OpenFDA
What To Tell Your Doctor or Pharmacist
If you are taking Armodafinil 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
- Ask whether any dosage adjustments are needed
- Never stop or change either medication without first consulting your healthcare provider