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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 27 (1985), S. 689-691 
    ISSN: 1432-1041
    Keywords: indomethacin ; Osmosin ; plasma and synovial fluid ; polyarthritis ; inflammation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary ‘Osmosin’ (sodium indomethacin trihydrate, now withdrawn) produced a constant rate of release of indomethacin into the gut. Paired plasma and synovial fluid samples were obtained at regular intervals following a single dose of ‘Osmosin’ (19 patients) and after continuous daily dosing (15 patients). Indomethacin is rapidly absorbed and plasma concentrations maintained in the range 0.3 to 0.6 µg/ml after the first 4 h. Equilibrium between plasma and synovial fluid occurs, with SF/plasma ratios 0.74 to 0.82 12–24 h after a single dose and up to 0.96 thereafter. The indomethacin synovial fluid/plasma profile is changed by Osmosin from the pattern of a short half-life drug to the pattern typical of a long half-life drug. Results from serial samples obtained by use of indwelling cannulae (in vein and knee joint) show close agreement with our single paired sampling technique. Our method may have theoretical disadvantages but it has many practical advantages.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1041
    Keywords: diclofenac sodium ; slow-release formulation ; plasma and synovial fluid concentrations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Plasma and knee joint synovial fluid (SF) concentration of diclofenac sodium and its hydroxylated metabolites were measured after chronic dosing with the 100 mg polymer matrix formulation. Peak concentrations were reached in plasma and SF roughly after administration. Plasma concentrations then fell rapidly, but concentrations in SF were maintained for up to 25 h. The active metabolite was present in both fluids throughout the study period. The slow-release form showed a longer plasma/SF equilibration time than the conventional tablet had in a previous study. Prostaglandin E1 and F2a concentrations were lower in the early post-dose period but did not correlate with drug concentrations.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1434-9949
    Keywords: Kidney ; NSAID ; Tenoxicam ; Osteoarthritis ; Rheumatoid Arthritis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Fifty-eight patients, aged 48–87 years, with impaired renal function and mean initial creatinine clearance of 52.1 mls/min were recruited to a 12-week open study of tenoxicam 20 mg/day for osteoarthrosis or rheumatoid arthritis. Renal function was mea sured before and after a brief run-in period when patients discontinued all nonsteroidal anti-inflammatory drugs, taking paracetamol alone, prior to monthly monitoring thereafter. Fifty-four% of patients completed the study, the others being withdrawn from lack of efficacy (17%), adverse events (24%) or both (5%). During the run-in period the mean creatinine clearance of 28 patients completing the trial improved to 64.7 mls/min and then dropped to 57.9 mls/min during the course of 12 weeks treatment with tenoxicam. Serial analysis of haematological and biochemical safety parameters showed no drug-induced change of significance. Twenty-three% of patients felt worse and 45% better at the end of treatment. Seventeen patients withdrew because of adverse events. These were normally gastrointestinal and always unrelated to further deterioration in renal function. Tenoxicam, 20 mg/day, can be given safely for a period of at least three months in patients with mild or moderate renal impairment.
    Type of Medium: Electronic Resource
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