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Pronunciation |
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(me
kloe fen AM
ate) |

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Generic
Available |
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Yes |

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Synonyms |
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Meclofenamate Sodium |

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Pharmacological Index |
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Nonsteroidal Anti-Inflammatory Agent (NSAID) |

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Use |
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Treatment of inflammatory disorders |

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Pregnancy Risk
Factor |
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B (D in 3rd trimester) |

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Contraindications |
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Active GI bleeding, ulcer disease, hypersensitivity to aspirin,
meclofenamate, or other NSAIDs |

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Warnings/Precautions |
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May have adverse effects on fetus; use with caution with
dehydration |

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Adverse
Reactions |
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>10%:
Central nervous system: Dizziness
Dermatologic: Rash
Gastrointestinal: Abdominal cramps, heartburn, indigestion, nausea
1% to 10%:
Central nervous system: Headache, nervousness
Dermatologic: Itching
Endocrine & metabolic: Fluid retention
Gastrointestinal: Vomiting
Otic: Tinnitus
<1%: Congestive heart failure, hypertension, arrhythmia, tachycardia,
confusion, hallucinations, aseptic meningitis, mental depression, drowsiness,
insomnia, urticaria, erythema multiforme, toxic epidermal necrolysis,
Stevens-Johnson syndrome, angioedema, polydipsia, hot flashes, gastritis, GI
ulceration, cystitis, polyuria, agranulocytosis, anemia, hemolytic anemia, bone
marrow suppression, leukopenia, thrombocytopenia, hepatitis, peripheral
neuropathy, toxic amblyopia, blurred vision, conjunctivitis, dry eyes, decreased
hearing, acute renal failure, allergic rhinitis, shortness of breath, epistaxis
|

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Overdosage/Toxicology |
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Symptoms of overdose include drowsiness, lethargy, nausea, vomiting,
seizures, paresthesia, headache, dizziness, GI bleeding, cerebral edema, cardiac
arrest, tinnitus
Management of a nonsteroidal anti-inflammatory drug (NSAID) intoxication is
primarily supportive and symptomatic. Fluid therapy is commonly effective in
managing the hypotension that may occur following an acute NSAID overdose,
except when this is due to an acute blood loss. Seizures tend to be very
short-lived and often do not require drug treatment. Although, recurrent
seizures should be treated with I.V. diazepam. Since many of the NSAID undergo
enterohepatic cycling, multiple doses of charcoal may be needed to reduce the
potential for delayed toxicities. |

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Drug
Interactions |
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Decreased effect with aspirin; decreased effect of diuretics,
antihypertensives; ACE-inhibitor effects may be decreased by concurrent therapy
with NSAIDs
Increased effect/toxicity of warfarin, methotrexate |

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Mechanism of
Action |
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Inhibits prostaglandin synthesis by decreasing the activity of the enzyme,
cyclo-oxygenase, which results in decreased formation of prostaglandin
precursors |

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Pharmacodynamics/Kinetics |
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Duration of action: 2-4 hours
Distribution: Crosses the placenta
Protein binding: 99%
Half-life: 2-3.3 hours
Time to peak serum concentration: Within 0.5-1.5 hours
Elimination: Principally in urine and in feces as glucuronide conjugates
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Usual Dosage |
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Children >14 years and Adults: Oral:
Rheumatoid arthritis/osteoarthritis: 200-400 mg/day in 3-4 equal doses
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Dietary
Considerations |
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May be administered with food, milk, or antacids |

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Test
Interactions |
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chloride (S),
sodium
(S)
|

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Mental Health: Effects
on Mental Status |
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Dizziness is common; may cause drowsiness, confusion, hallucinations, or
depression |

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Mental Health:
Effects on Psychiatric
Treatment |
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May rarely cause agranulocytosis; use caution with clozapine or
carbamazepine; may decrease lithium clearance resulting in an increase in serum
lithium levels and potential lithium toxicity; monitor serum lithium
levels |

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Dental Health: Local
Anesthetic/Vasoconstrictor
Precautions |
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No information available to require special precautions |

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Dental Health:
Effects on Dental Treatment |
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NSAID formulations are known to reversibly decrease platelet aggregation via
mechanisms different than observed with aspirin. The dentist should be aware of
the potential of abnormal coagulation. Caution should also be exercised in the
use of NSAIDs in patients already on anticoagulant therapy with drugs such as
warfarin (Coumadin®). Recovery of platelet function
usually occurs 1-2 days after discontinuation of NSAIDs. |

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Patient
Information |
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Take with food, milk, or with antacids |

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Nursing
Implications |
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Should be used for short-term only (<7 days); advise patient to report
persistent GI discomfort, sore throat, fever, or malaise |

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Dosage Forms |
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Capsule, as sodium: 50 mg, 100 mg |

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References |
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Brooks PM and Day RO,
"Nonsteroidal Anti-inflammatory Drugs - Differences and Similarities," N Engl
J Med, 1991, 324(24):1716-25.
Clinch D, Banerjee AK, Ostick G,
"Absence of Abdominal Pain in Elderly Patients With Peptic Ulcer," Age
Ageing, 1984, 13:120-3.
Clive DM, Stoff JS,
"Renal Syndromes Associated With Nonsteroidal Anti-inflammatory Drugs," N
Engl J Med, 1984, 310(9):563-72.
Court H and Volans GN,
"Poisoning After Overdose With Nonsteroidal Anti-inflammatory Drugs," Adverse
Drug React Acute Poisoning Rev, 1984, 3(1):1-21.
"Drugs for Pain," Med Lett Drugs Ther, 1998, 40(1033):79-84.
Graham DY,
"Prevention of Gastroduodenal Injury Induced by Chronic Nonsteroidal Anti-inflammatory Drug Therapy,"
Gastroenterology, 1989, 96(2 Pt 2 Suppl):675-81.
Gurwitz JH, Avorn J, Ross-Degnan D, et al,
"Nonsteroidal Anti-Inflammatory Drug-Associated Azotemia in the Very Old,"
JAMA, 1990, 264(4):471-5.
Hawkey CJ, Karrasch JA, Szczepanski L, et al,
"Omeprazole Compared With Misoprostrol for Ulcers Associated With Nonsteroidal Anti-inflammatory Drugs,"
N Engl J Med, 1998, 338(11):727-34.
Hoppmann RA, Peden JG, and Ober SK,
"Central Nervous System Side Effects of Nonsteroidal Anti-inflammatory Drugs. Aseptic Meningitis, Psychosis, and Cognitive Dysfunction,"
Arch Intern Med, 1991, 151(7):1309-13.
Pounder R, "Silent Peptic Ulceration: Deadly Silence or Golden Silence?"
Gastroenterology, 1989, 96(2 Pt 2 Suppl):626-31.
Smolinske SC, Hall AH, Vandenberg SA, et al,
"Toxic Effects of Nonsteroid Anti-inflammatory Drugs in Overdose. An Overview of Recent Evidence on Clinical Effects and Dose-Response Relationships,"
Drug Saf, 1990, 5(4):252-74.
Vale JA and Meredith TJ,
"Acute Poisoning Due to Nonsteroidal Anti-inflammatory Drugs," Med
Toxicol, 1986, 1(1):12-31.
Verbeeck RK,
"Pharmacokinetic Drug Interactions With Nonsteroidal Anti-inflammatory Drugs,"
Clin Pharmacokinet, 1990, 19(1):44-66.
Yeomans ND, Tulassay Z, Juhasz L, et al,
"A Comparison of Omeprazole With Ranitidine for Ulcers Associated With Nonsteroidal Anti-inflammatory Drugs,"
N Engl J Med, 1998, 338(11):719-26. |

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