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Brand names,
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Analogs
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Brand Names Mixture
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Chemical_Formula
C13H8F2O3
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RX_link
http://www.rxlist.com/cgi/generic3/diflunisal.htm
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fda sheet
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msds (material safety sheet)
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Synthesis Reference
No information avaliable
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Molecular Weight
250.198 g/mol
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Melting Point
210-221 oC
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H2O Solubility
Practically insoluble (14.5 mg/L) at neutral or acidic pH.
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State
Solid
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LogP
3.876
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Dosage Forms
Tablets for oral administration (250 mg or 500 mg)
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Indication
For acute or long-term use for symptomatic treatment of mild to moderate pain, osteoarthritis, and rheumatoid arthritis.
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Pharmacology
Diflunisal is a nonsteroidal drug with analgesic, anti-inflammatory and antipyretic properties. It is a peripherally-acting non-narcotic analgesic drug. Habituation, tolerance and addiction have not been reported. Diflunisal is a difluorophenyl derivative of salicylic acid. Chemically, diflunisal differs from aspirin (acetylsalicylic acid) in two respects. The first of these two is the presence of a difluorophenyl substituent at carbon 1. The second difference is the removal of the 0-acetyl group from the carbon 4 position. Diflunisal is not metabolized to salicylic acid, and the fluorine atoms are not displaced from the difluorophenyl ring structure.
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Absorption
Rapidly and completely absorbed following oral administration, with a bioavailability of 80-90%.
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side effects and Toxicity
Oral LD50 in rat, mouse, and rabbit is 392 mg/kg, 439 mg/kg, and 603 mg/kg, respectively. Symptoms of overdose include coma, tachycardia, stupor, and vomiting. The lowest dose without the presence of other medicines which caused death was 15 grams.
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Patient Information
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Organisms Affected
Humans and other mammals