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(ibuprofen and famotidine) Tablets



Cardiovascular Risk

  • NSAIDs may cause an increased risk of serious cardiovascular thrombotic events, myocardial infarction, and stroke, which can be fatal. This risk may increase with duration of use. Patients with cardiovascular disease or risk factors for cardiovascular disease may be at greater risk [see WARNINGS AND PRECAUTIONS].
  • NSAIDs, including DUEXIS, are contraindicated for treatment of perioperative pain in the setting of coronary artery bypass graft (CABG) surgery [see WARNINGS AND PRECAUTIONS].

Gastrointestinal Risk

  • NSAIDs cause an increased risk of serious gastrointestinal adverse reactions including bleeding, ulceration, and perforation of the stomach or intestines, which can be fatal. These reactions can occur at any time during use and without warning symptoms. Elderly patients are at greater risk for serious gastrointestinal events [see WARNINGS AND PRECAUTIONS].


DUEXIS (ibuprofen and famotidine) is supplied as a tablet for oral administration which combines the nonsteroidal anti-inflammatory agent, ibuprofen, and the histamine H2-receptor antagonist, famotidine.

Ibuprofen is (±)-2-(p-isobutylphenyl)propionic acid. Its chemical formula is C13H18O2 and molecular weight is 206.28. Ibuprofen is a white powder that is very slightly soluble in water ( < 1 mg/mL) and readily soluble in organic solvents such as ethanol and acetone. Its structural formula is:

Ibuprofen Structural Formula Illustration

Famotidine is N'-(aminosulfonyl)-3-[[[2-[(diaminomethylene)amino]-4-thiazolyl]methyl]thio]propanimidamide. Its chemical formula is C8H15N7O2S3 and molecular weight is 337.45. Famotidine is a white to pale yellow crystalline compound that is freely soluble in glacial acetic acid, slightly soluble in methanol, very slightly soluble in water, and practically insoluble in ethanol. Its structural formula is:

Famotidine Structural Formula Illustration

Each DUEXIS tablet contains ibuprofen, USP (800 mg) and famotidine, USP (26.6 mg) and the following inactive ingredients: microcrystalline cellulose, anhydrous lactose, croscarmellose sodium, colloidal silicon dioxide, magnesium stearate, purified water, povidone, titanium dioxide, polyethylene glycol, polysorbate 80, polyvinyl alcohol, hypromellose, talc, FD&C Blue #2/Indigo Carmine Aluminum Lake, and FD&C Blue #1/Brilliant Blue FCF Aluminum Lake.

What are the possible side effects of famotidine and ibuprofen (Duexis)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop taking famotidine and ibuprofen and seek medical attention or call your doctor at once if you have any of these serious side effects:

  • sudden numbness or weakness, especially on one side of the body;
  • sudden severe headache, confusion, problems with vision, speech, or balance;
  • black, bloody, or tarry stools, coughing up blood or vomit that looks like coffee...

Read All Potential Side Effects and See Pictures of Duexis »

Last reviewed on RxList: 1/31/2013
This monograph has been modified to include the generic and brand name in many instances.

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


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