ARTHROTEC® (diclofenac sodium/misoprostol) Tablets Overdosage

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Prescribing Information

ARTHROTEC^® (diclofenac sodium/misoprostol) Tablets
Overdosage


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The toxic dose of ARTHROTEC has not been determined. However, signs of overdosage from the components of the product have been described.

Diclofenac sodium

Clinical signs that may suggest diclofenac sodium overdose include GI complaints, confusion, drowsiness or general hypotonia. Reports of overdosage with diclofenac cover 66 cases. In approximately one-half of these reports of overdosage, concomitant medications were also taken. The highest dose of diclofenac was 5.0 g in a 17-year-old man who suffered loss of consciousness, increased intracranial pressure, and aspiration pneumonitis, and died 2 days after overdose. A 24-year-old woman who took 4.0 g and the 28- and 42-year-old women, each of whom took 3.75 g, did not develop any clinically significant signs or symptoms. However, there was a report of a 17-year-old female who experienced vomiting and drowsiness after an overdose of 2.37 g of diclofenac.

Animal studies show a wide range of susceptibilities to acute overdosage, with primates being more resistant to acute toxicity than rodents (LD₅₀ in mg/kg: rats, 55; dogs, 500; monkeys, 3200).

Misoprostol

The toxic dose of misoprostol in humans has not been determined. Cumulative total daily doses of 1600 mcg have been tolerated, with only symptoms of GI discomfort being reported. In animals, the acute toxic effects are diarrhea, GI lesions, focal cardiac necrosis, hepatic necrosis, renal tubular necrosis, testicular atrophy, respiratory difficulties, and depression of the central nervous system. Clinical signs that may indicate an overdose are sedation, tremor, convulsions, dyspnea, abdominal pain, diarrhea, fever, palpitations, hypotension, or bradycardia.

ARTHROTEC

Symptoms of overdosage with ARTHROTEC should be treated with supportive therapy. In case of acute overdosage, gastric lavage is recommended. Induced diuresis may be beneficial because diclofenac sodium and misoprostol metabolites are excreted in the urine. The effect of dialysis or hemoperfusion on the elimination of diclofenac sodium (99% protein bound) and misoprostol acid remains unproven. The use of oral activated charcoal may help to reduce the absorption of diclofenac sodium and misoprostol.

PRINTER-FRIENDLY

arthrotec_pi_overdosage.htm

ARTHROTEC Safety Information

CONTRAINDICATIONS AND WARNINGS
ARTHROTEC^® CONTAINS DICLOFENAC SODIUM AND MISOPROSTOL. ADMINISTRATION OF MISOPROSTOL TO WOMEN WHO ARE PREGNANT CAN CAUSE ABORTION, PREMATURE BIRTH, OR BIRTH DEFECTS. UTERINE RUPTURE HAS BEEN REPORTED WHEN MISOPROSTOL WAS ADMINISTERED IN PREGNANT WOMEN TO INDUCE LABOR OR TO INDUCE ABORTION BEYOND THE EIGHTH WEEK OF PREGNANCY (see also PRECAUTIONS). ARTHROTEC SHOULD NOT BE TAKEN BY PREGNANT WOMEN (see CONTRAINDICATIONS, WARNINGS and PRECAUTIONS).

PATIENTS MUST BE ADVISED OF THE ABORTIFACIENT PROPERTY AND WARNED NOT TO GIVE THE DRUG TO OTHERS. ARTHROTEC should not be used in women of childbearing potential unless the patient requires nonsteroidal anti-inflammatory drug (NSAID) therapy and is at high risk of developing gastric or duodenal ulceration or for developing complications from gastric or duodenal ulcers associated with the use of the NSAID (see WARNINGS). In such patients, ARTHROTEC may be prescribed if the patient:

has had a negative serum pregnancy test within 2 weeks prior to beginning therapy.
is capable of complying with effective contraceptive measures.
has received both oral and written warnings of the hazards of misoprostol, the risk of possible contraception failure, and the danger to other women of childbearing potential should the drug be taken by mistake.
will begin ARTHROTEC only on the second or third day of the next normal menstrual period.

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).
ARTHROTEC is contraindicated for treatment of peri-operative pain in the setting of coronary artery bypass graft (CABG) surgery (see WARNINGS).

Gastrointestinal Risk

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

ARTHROTEC is the only FDA-approved NSAID for the treatment of the signs and symptoms of osteoarthritis or rheumatoid arthritis in patients at high risk of developing NSIAD-induced gastric and duodenal ulcers and their complications

Important Safety Information

ARTHROTEC is contraindicated in women who are pregnant or who may become pregnant. ARTHROTEC can cause miscarriage, often associated with bleeding, which may result in other serious complications.

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.
ARTHROTEC is contraindicated for treatment of peri-operative pain in the setting of coronary artery bypass graft (CABG) surgery.

Gastrointestinal Risk

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

ARTHROTEC is contraindicated in patients with hypersensitivity to diclofenac or to misoprostol or other prostaglandins and in patients who have experienced asthma, urticaria, or other allergic-type reactions after taking aspirin or other NSAIDs. Severe, rarely fatal, anaphylactic-like reactions to diclofenac have been reported.

The most common adverse events in ARTHROTEC-treated patients are abdominal pain (21%), diarrhea (19%), dyspepsia (14%), nausea (11%), and flatulence (9%).

As with all NSAIDs, ARTHROTEC can lead to worsening of pre-existing hypertension or the onset of new hypertension, fluid retention, edema, or heart failure. ARTHROTEC should be used with caution in these patients.

Long-term administration of NSAIDs has resulted in renal papillary necrosis and other renal injury and may cause a dose dependent reduction in prostaglandin formation. Elevations in ALT and/or AST, and rare cases of severe hepatic reactions have also been reported. Transaminases should be monitored within 4-8 weeks after initiating treatment with ARTHROTEC and should be measured periodically thereafter.

Use the lowest effective dose for the shortest duration consistent with individual patient treatment goals.

NSAIDs can cause serious skin adverse events such as exfoliative dermatitis, Stevens-Johnson syndrome, and toxic epidermal necrolysis, which can be fatal.

Please see full prescribing information.

Arthrotec^® (diclofenac sodium/misoprostol)