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diclofenac vs sulindac

Side-by-side comparison of diclofenac and sulindac Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.

Drug Class
diclofenac Nonsteroidal Anti-Inflammatory Drug (NSAID)
sulindac Nonsteroidal Anti-Inflammatory Drug (NSAID)
Type
diclofenac Over-the-Counter
sulindac Prescription
Summary
diclofenac

Diclofenac is a gel that helps with arthritis pain in your hands, wrists, elbows, feet, ankles, or knees. It belongs to a class of drugs called NSAIDs.

sulindac

Sulindac is a nonsteroidal anti-inflammatory drug (NSAID). It helps to reduce pain and swelling.

What It Treats
diclofenac

This medicine temporarily relieves arthritis pain. It is only for pain in your hands, wrists, elbows, feet, ankles, or knees. It may take up to 7 days to start working. If you still have pain after 7 days, stop using it.

sulindac

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.

How It Works
diclofenac

Diclofenac is an NSAID. It reduces pain and swelling by blocking substances in the body that cause inflammation.

sulindac

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.

Common Side Effects
diclofenac
  • Pain
  • Headache
sulindac
  • Stomach pain
  • Upset stomach
  • Nausea (with or without vomiting)
  • Diarrhea
  • Constipation
FAERS Reports
diclofenac
  • Medicine not working 13,689
  • Pain 12,281
  • Tiredness 11,317
  • Rheumatoid arthritis 9,240
  • Rash 8,747
sulindac
  • The medicine is not working 213
  • Pain 182
  • Tiredness 151
  • Joint pain 138
  • Feeling sick to your stomach 123
Serious Warnings
diclofenac

There are no boxed warnings in the provided data.

sulindac

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.

Pregnancy
diclofenac

There is no information about pregnancy or breastfeeding in the provided data.

sulindac

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.

Also Compare — Nearby Drugs

How to Read This diclofenac vs sulindac Comparison

diclofenac 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 split between OTC and prescription status, which affects access and supervision.

Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, diclofenac has 55,274 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. No direct interaction between these two drugs is listed in our FDA-derived dataset, though co-prescription still warrants pharmacist review. 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 diclofenac 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.