Misoprostol and Diflunisal Interaction
Drug interaction information between Misoprostol and Diflunisal.
Misoprostol and Diflunisal have a documented moderate interaction in FDA labeling.
FDA drug labeling documents a moderate-severity interaction between Misoprostol and Diflunisal. Major interactions are generally avoided, moderate ones may need monitoring or a dose adjustment, and minor ones are usually low-risk. This page shows the documented mechanism and guidance. Label-documented interactions are not a complete safety review, so always confirm your own medications with a pharmacist or doctor. Educational information, not medical advice.
How They Interact
Taking these two drugs together increases the risk of stomach and intestinal damage without providing extra benefits. Both drugs belong to a class that can irritate the digestive tract.
What To Do
Avoid taking these two medications together because they increase the risk of stomach problems. Your doctor may suggest using only one of them.
FDA Label Information
NSAIDs and Salicylates Clinical Impact: Concomitant use of diclofenac with other NSAIDs or salicylates (e.g., diflunisal, salsalate) increases the risk of GI toxicity, with little or no increase in efficacy [see Warnings and Precautions (5.3) ].
Misoprostol Also Interacts With
- Diclofenac moderate
- Methotrexate moderate
- Furosemide minor
- Aspirin minor
- Propranolol minor
Diflunisal Also Interacts With
- Methotrexate moderate
- Cyclosporine moderate
- Celecoxib moderate
- Indomethacin moderate
- Mefenamic Acid moderate
Frequently Asked Questions
Can I take Misoprostol and Diflunisal together?
This is a moderate interaction. Avoid taking these two medications together because they increase the risk of stomach problems. Your doctor may suggest using only one of them.
How serious is the interaction between Misoprostol and Diflunisal?
This interaction is classified as "moderate" severity by the FDA. Moderate interactions may worsen your condition or change how your medications work.
Why do Misoprostol and Diflunisal interact?
Taking these two drugs together increases the risk of stomach and intestinal damage without providing extra benefits. Both drugs belong to a class that can irritate the digestive tract.
Understanding the Misoprostol and Diflunisal Interaction
FDA-approved prescribing information for these two drugs flags their combination as a moderate-severity interaction. Misoprostol belongs to the Prostaglandin E1 Analog class and Diflunisal belongs to the Nonsteroidal Anti-Inflammatory Drug (NSAID) class - two categories that can collide when co-prescribed. The mechanism described in FDA labeling is: Taking these two drugs together increases the risk of stomach and intestinal damage without providing extra benefits. Severity tiers matter: major flags generally advise avoidance, moderate flags often require monitoring or dose adjustment, and minor flags may only call for awareness.
Context around a specific patient determines real-world impact. Misoprostol has 12 total documented interactions on file in this dataset, and Diflunisal has 17. Each additional medication compounds the interaction surface, which is why pharmacists run full-profile checks rather than evaluating one pair at a time. FDA-derived guidance for this pair is: Avoid taking these two medications together because they increase the risk of stomach problems. Timing of doses, renal and hepatic function, age, and other concurrent prescriptions all shape whether a labeled interaction matters clinically.
An interaction flag is not a verdict. A large share of labeled interactions are managed routinely in clinical practice, the fix may be as simple as spacing doses or adding a monitoring test. Others require the prescriber to choose a different medication entirely. This page surfaces FDA-sourced labeling and openFDA data for educational purposes only; it is not medical advice and cannot account for your full clinical picture. Never start, stop, or adjust either Misoprostol or Diflunisal based on a web page, speak with your prescriber or pharmacist before making any change.
Sources: FDA Drug Labels (SPL) via openFDA (2026). This is for informational purposes only and is not medical advice. Always consult your healthcare provider about drug interactions.
Read our methodology - how this data is sourced, computed, and verified.