Celebrex vs. Diclofenac

See how Celebrex and Diclofenac compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Celebrex is a COX-2 selective NSAID linked to fewer stomach ulcers than diclofenac, though both carry the same boxed warnings for heart attack, stroke, and stomach bleeding.

  • Both drugs treat osteoarthritis, rheumatoid arthritis, ankylosing spondylitis, acute pain, and menstrual cramps, but only Celebrex has an approved dose for children with juvenile arthritis.

  • Diclofenac comes in more forms, including an over-the-counter topical gel, while Celebrex is only available as an oral capsule or oral solution.

Celebrex vs. Diclofenac Drug Summary

Celebrex

Celebrex (celecoxib) is a COX-2 selective NSAID used to relieve pain and inflammation from osteoarthritis, rheumatoid arthritis, ankylosing spondylitis, acute pain, and menstrual cramps. It's taken as an oral capsule, usually once or twice daily depending on the condition being treated.

Diclofenac

Diclofenac is a non-selective NSAID used for the same core conditions: osteoarthritis, rheumatoid arthritis, ankylosing spondylitis, acute pain, and menstrual cramps. It's taken as a delayed-release oral tablet, usually two to three times daily depending on the dose.

Celebrex vs. Diclofenac Side Effects

Celebrex

Most common
Dyspepsia (up to 9%)
Respiratory infection (up to 8%)
Diarrhea (up to 6%)
Peripheral edema (up to 5%)

Diclofenac

Most common
Gastrointestinal symptoms (up to 20%)
Headache (up to 7%)
Dizziness (up to 3%)
Elevated liver enzymes (up to 2%)

Celebrex vs. Diclofenac Dosage

Celebrex

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 200 mg once daily At the start
Maximum dose 200 mg twice daily Day 2 onward
Dose changes 5 increases Every day

Diclofenac

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 50 mg two-three x daily At the start
Maximum dose 50 mg two-three x daily Same as starting
Dose changes None Fixed dose

Celebrex vs. Diclofenac Indications

Celebrex

Celebrex is FDA-approved for osteoarthritis, rheumatoid arthritis, ankylosing spondylitis, acute pain, and primary dysmenorrhea. It also has an approved pediatric dose for juvenile rheumatoid arthritis in children 2 years and older. Off-label, it's sometimes used for other inflammatory pain conditions.

  • Osteoarthritis

  • Rheumatoid arthritis

  • Ankylosing spondylitis

  • Acute pain

  • Primary dysmenorrhea (menstrual cramps)

Diclofenac

Diclofenac is FDA-approved for osteoarthritis, rheumatoid arthritis, ankylosing spondylitis, mild to moderate acute pain, and primary dysmenorrhea. It is not approved for use in children, and topical and other formulations carry separate approvals. Off-label use for other pain conditions is common.

  • Osteoarthritis

  • Rheumatoid arthritis

  • Ankylosing spondylitis

  • Mild to moderate acute pain

  • Primary dysmenorrhea (menstrual cramps)

Celebrex vs. Diclofenac Pros and Cons

Celebrex

Celebrex's COX-2 selectivity is linked to fewer GI ulcers and less bleeding than non-selective NSAIDs, and it's the only one of the two approved for children with juvenile arthritis. It's typically covered by insurance and Medicare as a generic, though it only comes as an oral capsule or solution.

Pros

  • COX-2 selective action means fewer stomach ulcers and less GI bleeding than non-selective NSAIDs like diclofenac.

  • Approved for juvenile rheumatoid arthritis in children 2 and older, an option diclofenac doesn't have.

  • Doesn't interfere with platelet function the way diclofenac does, which may matter for people on blood thinners.

Cons

  • Only available as an oral capsule or oral solution, with no topical or injectable version.

  • People who poorly metabolize the CYP2C9 enzyme may need a lower starting dose.

  • Contains a sulfonamide group, so it should be avoided by people with a sulfa drug allergy.

Diclofenac

Diclofenac's long track record and multiple formulations, including an over-the-counter topical gel, make it a flexible option for localized pain. As a non-selective NSAID, it carries a higher combined rate of GI symptoms and isn't approved for use in children.

Pros

  • Available in oral, topical gel, ophthalmic, and injectable forms, including an over-the-counter gel.

  • Doesn't require special dose adjustments for CYP2C9 poor metabolizers the way Celebrex does.

  • Generic and widely used since the late 1980s, one of the most commonly prescribed NSAIDs worldwide.

Cons

  • Carries a higher combined rate of GI symptoms (about 20%) than Celebrex's individual reaction rates.

  • Not approved for use in children; safety and effectiveness haven't been established.

  • Inhibits platelet function like typical NSAIDs, which may raise bleeding risk for people on blood thinners.

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