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Pronunciation: e-TOE-doe-lak
Class: NSAID

Trade Names

- Capsules 200 mg
- Capsules 300 mg
- Tablets 400 mg
- Tablets 500 mg
- Tablets, extended-release 400 mg
- Tablets, extended-release 500 mg
- Tablets, extended-release 600 mg

Apo-Etodolac (Canada)


Decreases inflammation, pain, and fever, probably through inhibition of cyclooxygenase activity and prostaglandin synthesis.

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Well-absorbed. Bioavailability is 80% or more. C max is approximately 14 to 37 mcg/mL. T max is approximately 1.4 h. Food decreases C max approximately 50% and increases T max by 1.4 to 3.8 h.


Vd is approximately 390 mL/kg. More than 99% protein bound.



Extensively metabolized in the liver.


Terminal t ½ is 6.4 h. Cl is 49 mL/h/kg. Approximately 72% is recovered in the urine, with 1% as unchanged drug; 16% is excreted in feces.

Special Populations

Severe hepatic failure

Cl may be reduced.


50% greater apparent Cl of total etodolac.

Indications and Usage

Relief of mild to moderate pain; relief of signs and symptoms of rheumatoid arthritis and osteoarthritis.


Treatment of perioperative pain in the setting of coronary artery bypass graft surgery; patients who have experienced asthma, urticaria, or allergic-type reactions after taking aspirin or other NSAIDs; hypersensitivity to any component of the product.

Dosage and Administration


PO 200 to 400 mg q 6 to 8 h as needed. Dosages more than 1,000 mg/day have not been adequately evaluated.

Osteoarthritis/Rheumatoid Arthritis

PO 300 mg twice daily or 3 times daily, or 400 or 500 mg twice daily. Dosages more than 1,000 mg/day have not been adequately evaluated.

General Advice

  • Food delays peak action of medication by 1 to 4 h. Give with food, milk, or antacids if stomach upset occurs.


Store at 68° to 77°F. Dispense in tight, light-resistant container. Protect from moisture.

Drug Interactions

Angiotensin-converting enzyme (ACE) inhibitors

Antihypertensive effect of ACE inhibitors may be diminished.


May increase PT. Watch for signs and symptoms of bleeding.


Protein binding of etodolac may be reduced; in addition, the risk of gastric erosion and bleeding may be increased.


May decrease diuretic effect.


May increase lithium levels and effects.


May increase methotrexate levels.

Laboratory Test Interactions

Serum uric acid levels

Drug may cause small decrease.

Urinary bilirubin test

Drug may cause false-positive results.

Urinary dipstick tests

Drug may cause results that are false positive for ketones.

Adverse Reactions


Vasculitis (postmarketing).


Dizziness, headache (1% to 10%); asthenia, depression, malaise, nervousness (at least 1%).


Pruritus, rash (1% to 10%); cutaneous vasculitis with purpura, erythema multiforme, hyperpigmentation, Stevens-Johnson syndrome, toxic epidermal necrolysis (postmarketing).


Tinnitus (1% to 10%); blurred vision (at least 1%).


Abdominal pain, constipation, diarrhea, dyspepsia, flatulence, GI ulcers, gross bleeding/perforation, heartburn, nausea, vomiting (1% to 10%); gastritis, melena (at least 1%).


Abnormal renal function (1% to 10%); dysuria, urinary frequency (at least 1%); elevated BUN, renal failure, renal insufficiency, renal papillary necrosis (postmarketing).


Anemia (1% to 10%).


Increased bleeding time (1% to 10%); agranulocytosis, hemolytic anemia, leukopenia, neutropenia, pancytopenia (postmarketing).


Elevated liver enzymes (1% to 10%); cholestatic hepatitis, cholestatic jaundice, duodenitis, hepatic failure, intestinal ulceration, jaundice, liver necrosis, pancreatitis (postmarketing).


Hyperglycemia in previously controlled diabetic patients (postmarketing).


Pulmonary infiltration with eosinophilia (postmarketing).


Edema (1% to 10%); chills and fever (at least 1%); allergic reactions, anaphylactic/anaphylactoid reactions (postmarketing).



NSAIDs may cause an increased risk of serious CV thrombotic events, MI, and stroke, which can be fatal. This risk may increase with length of therapy. Patients with CV disease or risk factors for CV disease may be at greater risk. Contraindicated for the treatment of perioperative pain in the setting of coronary artery bypass graft surgery. NSAIDs cause an increased risk of serious GI adverse reactions, including bleeding, inflammation, ulceration, and perforation of the stomach or intestines, which can be fatal. These events can occur any time during use and without warning symptoms. Elderly patients are at greater risk of serious GI events.


Check CBC and obtain a chemistry profile in patients on long-term therapy. Assess location, duration, and intensity of pain before and 60 min after administration. Assess renal function before and during therapy. Evaluate patients who develop signs or symptoms suggestive of liver dysfunction or who develop abnormal liver function for development of more severe hepatic reactions while on therapy. Monitor blood pressure closely. Carefully monitor patients who may be adversely affected by alterations in platelet function (eg, patients with coagulation disorders or receiving anticoagulant therapy).


Category C . Avoid in late pregnancy.




Safety and efficacy not established.


Use with caution.


May occur; use with caution in aspirin-sensitive individuals because of possible cross-sensitivity.

Renal Function

Not recommended in patients with advanced renal disease. Acute renal insufficiency, interstitial nephritis, hyperkalemia, hyponatremia, and renal papillary necrosis may occur.

Hepatic Function

Cl may be reduced in patients with severe hepatic failure.

Special Risk Patients

Use with caution in patients with fluid retention or heart failure.

Anaphylactoid reactions

Do not administer to patients with aspirin triad, which occurs typically in asthmatic patients who experience rhinitis with or without nasal polyps, or in patients who exhibit severe, potentially fatal bronchospasm after taking aspirin or other NSAIDs.


Patients with asthma may have aspirin-sensitive asthma, which may be associated with severe and sometimes fatal bronchospasm. Do not administer etodolac to patients with this type of aspirin sensitivity and use with caution in patients with preexisting asthma.


New hypertension or worsening of preexisting hypertension, either of which may contribute to increased risk of CV events, may occur.

Platelet function

NSAIDs inhibit platelet aggregation and have been reported to prolong bleeding time.

Skin reactions

Serious and sometimes fatal skin adverse reactions, including exfoliative dermatitis, Stevens-Johnson syndrome, and toxic epidermal necrolysis, may occur.



Acute renal failure, anaphylactoid reactions, drowsiness, epigastric pain, GI bleeding, hypertension, lethargy, nausea, respiratory depression, vomiting.

Patient Information

  • Advise patient to discontinue drug and immediately notify health care provider if any of the following occur: persistent or recurrent GI upset or stomach pain, skin rash or itching, vomiting blood, bloody or black stools, rapid weight gain or swelling, changes in urine patterns, joint pain, fever, bleeding or unusual bruising, unexplained tiredness or fatigue, intestinal flu-like symptoms, yellowing of the skin or eyes, visual changes.
  • Advise patient to seek emergency medical assistance if any of the following occur: shortness of breath or trouble breathing, chest pain, weakness in one part or on one side of body, slurred speech, swelling of the face or throat.
  • Advise patient to inform health care provider or dentist of medication regimen before treatment or surgery.
  • Caution patient not to use aspirin or drink alcoholic beverages while taking this medication.
  • Advise patient that drug may cause drowsiness and to use caution while driving or performing tasks requiring mental alertness.

Copyright © 2009 Wolters Kluwer Health.