Medically reviewed by Militian Inessa Mesropovna, PharmD. Last updated on 2020-03-17
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Etodolac is indicated for acute or long term use in :
ii) Rheumatoid arthritis.
For oral administration
To be taken preferably with or after food.
Undesirable effects may be minimised by using the lowest effective dose for the shortest duration necessary to control symptoms.
Usual adult dose1 -2 hard capsules daily in two divided doses or as a single daily dose.
Children: It is not recommended for use in children.
Elderly: No dosage adjustment in initial dosage is generally required in the elderly (see precautions).
The elderly are at increased risk of the serious consequences of adverse reactions. If an NSAID I considered necessary, the lowest effective dose should be used and for the shortest possible duration. The patient should be monitored regularly for GI bleeding during NSAID therapy.
Etodolac is contraindicated in patients who have a previous history of hypersensitivity to etodolac or to any of the excipients.
Active, or history of recurrent peptic ulcer/haemorrhage (two or more distinct episodes of proven ulceration or bleeding).
NSAIDs are contraindicated in patients who have previously shown hypersensitivity reactions (e.g. asthma, rhinitis, angioedema or urticaria) in response to ibuprofen, aspirin, or other non-steroidal anti-inflammatory drugs.
History of gastrointestinal bleeding or perforation, related to previous NSAIDs therapy.
Etodolac should not be used in patients with severe heart failure, hepatic failure and renal failure.
During the last trimester of pregnancy
The use of Etodolac with concomitant NSAIDs including cyclooxygenase- 2 selective inhibitors should be avoided.
Caution is required if etodolac is administered to patients suffering from, or with a previous history of bronchial asthma since NSAIDs have been reported to cause bronchospasm in such patients.
Cardiovascular, Renal and Hepatic Impairment:
The administration of an NSAID may cause a dose dependent reduction in prostaglandin formation and precipitate renal failure.).
Etodolac should be used with caution in patients with fluid retention, hypertension or heart failure.
Hepatic and renal function, haematological parameters of patients on long term use of etodolac should be regularly reviewed.
Although non-steroidal anti-inflammatory drugs do not have the same direct effects on platelets as does aspirin, all such drugs which inhibit the biosynthesis of prostaglandins may interfere with platelet function.
Patients who may be adversely affected due to inhibition of platelet function should be carefully observed.
No dosage adjustment is generally necessary in the elderly. However, caution should be exercised in treating the elderly, and when individualising their dosage, extra care should be taken while increasing the dose. The elderly have an increased frequency of adverse reactions to NSAIDs especially gastrointestinal bleeding and perforation which may be fatal.
Safety and efficacy in children have not been established and therefore etodolac is not recommended in children.
Cardiovascular and cerebrovascular effects:
Appropriate monitoring and advice are required for patients with a history of hypertension and/or mild to moderate congestive heart failure as fluid retention and oedema have been reported in association with NSAID therapy.
Clinical trial and epidemiological data suggest that use of some NSAIDs (particularly at high doses and in long term treatment) may be associated with a small increased risk of arterial thrombotic events (for example myocardial infarction or stroke). There are insufficient data to exclude such a risk for Etodolac.
Patients with uncontrolled hypertension, congestive heart failure, established ischaemic heart disease, peripheral arterial disease, and/or cerebrovascular disease should only be treated with Etodolac after careful consideration.
Similar consideration should be made before initiating longer-term treatment of patients with risk factors for cardiovascular disease (e.g. hypertension, hyperlipidaemia, diabetes mellitus, smoking).
Gastrointestinal bleeding, ulceration and perforation:
GI bleeding, ulceration or perforation, which can be fatal, has been reported with all NSAIDs at any time during treatment, with or without warning symptoms or a previous history of serious GI events.
The risk of GI bleeding, ulceration or perforation is higher with increasing NSAID doses, in patients with a history of ulcer, particularly if complicated with haemorrhage or perforation , and in the elderly.).
Patients with a history of GI toxicity, particularly when elderly, should report any unusual abdominal symptoms (especially GI bleeding) particularly in the initial stages of treatment.
Caution should be advised in patients receiving concomitant medications which could increase the risk of ulceration or bleeding, such as oral corticosteroids, anticoagulants such as warfarin, selective serotonin-reuptake inhibitors or antiplatelet agents such as aspirin.
When GI bleeding or ulceration occurs in patients receiving Etodolac, the treatment should be withdrawn.
NSAIDs should be given with care to patients with a history of gastrointestinal disease (ulcerative colitis, Crohn's disease) as these conditions may be exacerbated.
SLE and mixed connective tissue disease:
In patients with systemic lupus erythematosus (SLE) and mixed connective tissue disorders there may be an increased risk of aseptic meningitis.
Serious skin reactions, some of them fatal, including exfoliative dermatitis, Stevens-Johnson syndrome, and toxic epidermal necrolysis, have been reported very rarely in association with the use of NSAIDs. Patients appear to be at highest risk for these reactions early in the course of therapy: the onset of the reaction occurring in the majority of cases within the first month of treatment. Etodolac should be discontinued at the first appearance of skin rash, mucosal lesions, or any other sign of hypersensitivity.
Impaired female fertility:
The use of Etodolac may impair female fertility and is not recommended in women attempting to conceive. In women who have difficulties conceiving or who are undergoing investigation of infertility, withdrawal of Etodolac should be considered.
This product contains lactose. Patients with rare hereditary conditions such as galactose intolerance, Lapp lactase deficiency or glucose-galactose malabsorption should not use this medicinal product.
Etodolac can cause dizziness, drowsiness, fatigue and visual disturbance (abnormal vision). Patients need to be aware of how they react to this medicine before driving or operating machines. If affected, patients should not drive or operate machinery.
The most commonly-observed adverse events are gastrointestinal in nature.
Blood and lymphatic system disorders
Thrombocytopenia, neutropenia, agranulocytosis, aplastic anaemia and haemolytic anaemia.
Immune system disorders
Hypersensitivity reactions have been reported following treatment with NSAIDs. These may consist of (a) non-specific allergic reactions and anaphylaxis, anaphylactoid reaction
(b) respiratory tract reactivity comprising asthma, aggravated asthma, bronchospasm or dyspnoea, or (c) assorted skin disorders, including rashes of various types, pruritus, urticaria, purpura, angioedema and, more rarely exfoliative and bullous dermatoses (including epidermal necrolysis and erythema multiforme)
Nervous System disorders
Depression, headaches, dizziness, insomnia, confusion, hallucinations, disorientation paraesthesia, tremor, weakness, nervousness and drowsiness, reports of aseptic meningitis (especially in patients with existing auto-immune disorders, such as systemic lupus erythematosus, mixed connective tissue disease), with symptoms such as stiff neck, headache, nausea, vomiting.
Visual disturbances (abnormal vision), optic neuritis
Ear and labyrinth disorders
Oedema, hypertension, palpitation and cardiac failure, have been reported in association with NSAID treatment.
Clinical trial and epidemiological data suggest that use of some NSAIDs (particularly at high doses and in long term treatment) may be associated with an increased risk of arterial thrombotic events (for example myocardial infarction or stroke).
Peptic ulcers, perforation or GI bleeding, sometimes fatal, particularly in the elderly, may occur.
Nausea, vomiting, diarrhoea, dyspepsia, epigastric pain, ulcerative stomatitis, abdominal pain, constipation, flatulence, haematemesis, melaena, gastrointestinal ulceration, indigestion, heartburn, rectal bleeding. Exacerbation of colitis and Crohn's disease have been reported following administration. Less frequently, gastritis has been observed. Pancreatitis has been reported very rarely.
Abnormal liver function (bilirubinuria) hepatitis and jaundice.
Skin and subcutaneous tissue disorders:
Bullous reactions including Stevens Johnson Syndrome and Toxic Epidermal Necrolysis (very rare). Photosensitivity.
Renal and urinary disorders
Dysuria, urinary frequency (<1%), nephrotoxicity in various forms, including interstitial nephritis, nephritic syndrome and renal failure.
Malaise, fatigue, asthenia, chills, fever
Symptoms include headache, nausea, vomiting, epigastric pain, gastrointestinal bleeding, rarely diarrhoea, disorientation, excitation, coma, drowsiness, dizziness, tinnitus, fainting, occasionall convulsions. In cases of significant poisoning acute renal failure and liver damage are possible.
b) Therapeutic measure
Patients should be treated symptomatically as required. Within one hour of ingestion of a potentially toxic amount, activated charcoal should be considered. Alternatively, in adults, gastric lavage should be considered within one hour of ingestion of a potentially life-threatening overdose.
Good urine output should be ensured. Renal and liver function should be closely monitored.
Patients should be observed for at least four hours after ingestion of potentially toxic amounts.
Frequent or prolonged convulsions should be treated with intravenous diazepam.
Other measures may be indicated by the patient's clinical condition
M01a B (Anti-Inflammatory and Anti-Rheumatic Agents)
Mode Of Action
Etodolac is a non steroidal anti-inflammatory drug (NSAID) with anti-inflammatory, analgesic and antipyretic actions. The mode of action is thought to be through inhibition of the cyclo-oxygenase enzyme involved in prostaglandin synthesis.
Inhibition of prostaglandin synthesis and COX-2 selectivity: All non-steroidal anti-inflammatory drugs (NSAIDs) have been shown to inhibit the formation of prostaglandins. It is this action which is responsible both for their therapeutic effects and some of their side-effects. The inhibition of prostaglandin synthesis observed with etodolac differs from that of other NSAIDs. In an animal model at an established anti-inflammatory dose, cytoprotective PGE concentration in the gastric mucosa have been shown to be reduced to a lesser degree and for a shorter period than other NSAIDs. This finding is consistent with subsequent in-vitro studies which have found etodolac to be selective for induced cyclo-oxygenase 2 (COX-2, associated with inflammation) over COX-1 (cytoprotective).
Furthermore, studies in human cell models have confirmed that etodolac is selective for the inhibition of COX-2.
The clinical benefit of preferential COX-2 inhibition over COX-1 has yet to be proven.
Anti-inflammatory effects: Experiments have shown etodolac to have marked anti-inflammatory activity, being more potent than several clinically established NSAIDs.
Etodolac is well absorbed when taken orally. Following oral administration of 200 mg or 300mg of etodolac, the peak plasma concentration of 10-18 Âµg/ml and 36 Âµg/ml respectively is achieved in about 1-2 hours. Etodolac plasma concentrations, after multiple dose administration within therapeutic range, are only slightly higher than after single dose. Etodolac may be given with food or coadministered with antacids, as the extent of absorption of etodolac is not affected when administered after a meal or with an antacid. Etodolac is more than 99% bound to plasma proteins.
Etodolac penetrates readily into synovial fluid following oral administration in patients with arthritis. Consistent with the lower levels of total protein and albumin in synovial fluid compared to serum, the synovial fluid free etodolac auc (0-24 h) is 72% higher than the value for serum. In the post-distributive phase, total and free etodolac concentration in synovial fluid consistently exceeds those in serum, with mean synovial fluid: serum ratios of 1.18 and 3.25, between 8 and 32 hours post dose respectively.
Etodolac is extensively metabolised in the liver. Approximately 72% of the administered dose is recovered in the urine as inactive metabolites. 16% of the dose is excreted through faeces. The plasma half life of etodolac is 6-7.4 hours.
Studies in the elderly have shown similar pharmacokinetics as in younger individuals. No dosage adjustment is needed in the elderly. Since etodolac clearance is dependent on hepatic function, patients with severe hepatic failure may have reduced clearance. No change in pharmacokinetics has been noticed in patients of mild to moderate renal impairment compared to normals. In usual therapeutic doses etodolac decreases serum uric acid levels by 1-2 mg % after four weeks of administration.
The pharmacological and toxicological properties of etodolac are well established. Etodolac has no carcinogenic or mutagenic potential. It has shown no embryogenic or teratogenic effects. However an isolated alteration of limb development has occurred in rats receiving 2-14mg/kg/day.
No incompatibilities have been reported with etodolac.
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