Does Pantoprazole Sodium Interact with Methotrexate?
Pantoprazole Sodium and Methotrexate have a major drug interaction according to U.S. FDA drug labeling data. Concomitant use may elevate and prolong serum concentrations of methotrexate and/or hydroxymethotrexate, possibly leading to methotrexate toxicities, particularly at high doses. The mechanism involves elevated and prolonged methotrexate serum concentrations. 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
- Major
- Methotrexate Class
- Folate Analog Metabolic Inhibitor
- Management
- Close medical supervision required
- Data Source
- U.S. FDA via OpenFDA
How This Interaction Works
The interaction between Pantoprazole Sodium and Methotrexate occurs because elevated and prolonged methotrexate serum concentrations. Clinically, this means concomitant use may elevate and prolong serum concentrations of methotrexate and/or hydroxymethotrexate, possibly leading to methotrexate toxicities, particularly at high doses. This is classified as a major interaction, meaning it could cause serious harm if not properly managed. Your healthcare provider may need to adjust dosages, substitute one medication, or increase monitoring frequency.
What To Tell Your Doctor or Pharmacist
If you are taking Pantoprazole Sodium and your doctor is considering prescribing Methotrexate (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 how frequently you should be monitored while these are co-prescribed
- Ask whether any dosage adjustments are needed
- Never stop or change either medication without first consulting your healthcare provider