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  • 1
    Electronic Resource
    Electronic Resource
    Pharmacokinetics of enprofylline in patients with impaired renal function after a single intravenous dose (1984)
    Springer
    European journal of clinical pharmacology 26 (1984), S. 87-93 
    Details
    ISSN: 1432-1041
    Keywords: enprofylline ; pharmacokinetics ; renal elimination ; renal insufficiency ; healthy subjects ; creatinine clearance ; side effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Enprofylline, a new bronchodilating drug, was given i.v. at 1.0 mg/kg to 7 healthy subjects and to 14 patients with differing degrees of chronic renal insufficiency. Plasma and urine concentrations of unchanged drug were followed by HPLC. In the patients the plasma half-life was prolonged and the total and renal clearances were reduced in direct proportion to the degree of renal insufficiency as determined by creatinine clearance. The unbound fraction of enprofylline in plasma increased from 55% in the healthy subjects to 66% in the group of patients with the highest degree of renal impairment. The volume of distribution terms, Vβ and Vss, both tended to decrease with decreasing creatinine clearance. When the volume term calculations were based on the unbound drug level in plasma, this tendency was enhanced. Side-effects were noted in 4 subjects, and to some extent were related to the plasma level of the drug.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00546714
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of probenecid on enprofylline kinetics in man (1986)
    Springer
    European journal of clinical pharmacology 30 (1986), S. 221-223 
    Details
    ISSN: 1432-1041
    Keywords: enprofylline ; probenecid ; pharmacokinetics ; renal elimination ; active secretion ; drug interaction ; healthy subjects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Enprofylline 1 mg/kg, a new potent antiasthmatic xanthine derivative, which is mainly eliminated by renal excretion, was given intravenously to 6 normal subjects with and without oral pretreatment with 1 g probenecid. The latter caused a drop in the average total body clearance of enprofylline from 21 to 9.8 l/h, and in the average renal clearance from 17 to 8.0 l/h. The average half-life increased from 1.8 to 3.0 h. The volumes of distribution, Vz and Vss, both fell by about 25%, indicating that probenecid had restricted the distribution of enprofylline in the body. The plasma protein binding of enprofylline was not altered by probenecid. The results confirm the opinion that active tubular secretion accounts for a large proportion of the total elimination of enprofylline.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00614308
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    Paper (German National Licenses)
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