Drug interactions
Diflunisal + Indomethacin
Severity: Major
Diflunisal and Indomethacin: major interaction.
Last updated Sources: US FDA label
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Combining two NSAIDs increases the risk of gastrointestinal ulceration and bleeding and of renal injury without additional analgesic benefit.
What this interaction means in plain words
Diflunisal and Indomethacin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Diflunisal belongs to Musculoskeletal; Indomethacin belongs to Musculoskeletal.
Why it happens
Duplicate cyclooxygenase inhibition with additive effects on gastric mucosa, platelets and renal prostaglandins.
What to do
Avoid using the two together; use a single NSAID at the lowest effective dose.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
Other interactions of Diflunisal
- Diflunisal + Ketorolac Contraindicated
- Diflunisal + Ketorolac intranasal Contraindicated
- Acemetacin + Diflunisal Major
- Acetazolamide + Diflunisal Major
- Alteplase + Diflunisal Major
- Amiloride + Diflunisal Major
Other interactions of Indomethacin
- Indomethacin + Ketorolac Contraindicated
- Indomethacin + Ketorolac intranasal Contraindicated
- Aceclofenac + Indomethacin Major
- Acemetacin + Indomethacin Major
- Acetylsalicylic acid + Indomethacin Major
- Alteplase + Indomethacin Major
Frequently asked questions
Can I take Diflunisal with Indomethacin?
MediHelp rates the interaction as major. Diflunisal and Indomethacin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Combining two NSAIDs increases the risk of gastrointestinal ulceration and bleeding and of renal injury without additional analgesic benefit.
How serious is the interaction between Diflunisal and Indomethacin?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid using the two together; use a single NSAID at the lowest effective dose.
What other medicines interact with Diflunisal?
MediHelp also lists interactions of Diflunisal with, for example, Ketorolac, Ketorolac intranasal, Acemetacin. The full list is on the Diflunisal page.
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