diflunisal vs sulindac
Side-by-side comparison of diflunisal and sulindac Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
Diflunisal The concomitant administration of sulindac and diflunisal in normal volunteers resulted in lowering of the plasma levels of the active sulindac sulfide metabolite by approximately one-third.
Recommendation: Your doctor may need to adjust your treatment because sulindac might not work as effectively.
Dolobid
Clinoril
Diflunisal is a medicine that can help with pain and swelling. It belongs to a class of drugs called NSAIDs.
Sulindac is a nonsteroidal anti-inflammatory drug (NSAID). It helps to reduce pain and swelling.
Diflunisal can help with mild to moderate pain. It can also treat the symptoms of osteoarthritis and rheumatoid arthritis. You should use the lowest dose that works for you, for the shortest time needed.
Sulindac can help with the pain and swelling from different types of arthritis. This includes osteoarthritis and rheumatoid arthritis. It can also treat ankylosing spondylitis, a painful shoulder, and gout.
Diflunisal reduces pain and swelling by blocking the production of certain chemicals in your body. These chemicals cause inflammation and pain. By blocking them, diflunisal helps to relieve your symptoms.
Sulindac works by reducing substances in the body that cause pain and inflammation. It gets converted into an active form in your body. This active form then blocks the production of these inflammatory substances.
- • Nausea
- • Vomiting
- • Upset stomach
- • Stomach pain
- • Diarrhea
- • Stomach pain
- • Upset stomach
- • Nausea (with or without vomiting)
- • Diarrhea
- • Constipation
- Feeling sick to your stomach 66
- Feeling very tired 57
- Discomfort or aching 50
- Allergic reaction to the medicine 47
- Pain in your head 45
- The medicine is not working 213
- Pain 182
- Tiredness 151
- Joint pain 138
- Feeling sick to your stomach 123
NSAIDs like diflunisal can increase your risk of heart problems like heart attack and stroke, which can be deadly. This risk is higher if you take it for a long time. You should not take diflunisal if you are having heart bypass surgery. NSAIDs also raise your risk of serious stomach problems like bleeding and ulcers, which can also be deadly. Older adults are at higher risk for these stomach problems.
NSAIDs like sulindac can increase your risk of heart attack or stroke, which can be fatal. This risk can happen early in treatment and gets worse the longer you use sulindac. You should not take sulindac if you are having heart bypass surgery (CABG). NSAIDs also raise the risk of serious stomach problems like bleeding, ulcers, and holes in your stomach or intestines, which can be fatal. These problems can happen without warning. Older adults are at higher risk.
Tell your doctor if you are pregnant or plan to become pregnant. Taking diflunisal late in pregnancy may harm your baby. It is not known if diflunisal passes into breast milk, so talk to your doctor before breastfeeding.
Talk to your doctor if you are pregnant, plan to become pregnant, or are breastfeeding. Sulindac may harm your unborn baby. It is not known if sulindac passes into breast milk.
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How to Read This diflunisal vs sulindac Comparison
diflunisal is classified in the Nonsteroidal Anti-Inflammatory Drug (NSAID) drug class, while sulindac sits within the Nonsteroidal Anti-Inflammatory Drug (NSAID) class. Because both drugs share the same classification, they are often considered interchangeable in theory — but clinical outcomes rarely track that cleanly. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, diflunisal has 265 submissions while sulindac has 807. Those figures reflect cumulative reporting volume — not per-patient risk — so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to taking these two drugs together lowers the amount of the active form of sulindac in your bloodstream.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between diflunisal and sulindac — always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.