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  • normal subjects  (3)
  • bronchial asthma  (1)
  • haemodynamics  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 36 (1989), S. 29-34 
    ISSN: 1432-1041
    Keywords: theophylline ; asthma ; clearance ; age ; adults ; elderly ; normal subjects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Fifty three subjects (31 normal volunteers and 22 patients with asthma) between the ages of 20 and 87 years had their theophylline clearance measured. Volume of distribution (V) and terminal elimination half-life (t1/2) were also calculated in the volunteers who received i.v. theophylline. Although patients tended to have higher clearance values than volunteers, in both groups the oldest third had the lowest clearances. For the combined group (corrected for the patient effect) the oldest third (mean age 70 years) had a mean clearance of 0.53 versus 0.72 for the middle third (mean age 47 years) and 0.73 ml/min/kg CBW for the youngest third (mean age 26 years). There was no statistically significant age related change in V/kg CBW but t1/2 did rise with increasing age. Thus, although clearance does not fall with increasing age during younger adult life, there is a fall during late adult life becoming apparent in the seventh, eighth and ninth decades.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 30 (1986), S. 393-397 
    ISSN: 1432-1041
    Keywords: nifedipine ; nisoldipine ; nitrendipine ; haemodynamics ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Nifedipine (10 mg), nisoldipine (10 mg) and nitrendipine (20 mg) were given orally to 8 normal volunteers in a placebo controlled, double blind, crossover study. Blood pressure (BP), pulse (P) and systolic time intervals (STI) were recorded at time 0, 30, 60, 90, 120 min after drug administration. Adverse effects were also recorded. There was a fall in BP, pre-ejection time (PEP), PEP/LVET (left ventricular ejection time) and electro-mechanical systole index (QS2 index), and a rise in LVET index in response to the three active drugs compared with placebo. All active drugs, but not placebo, were associated with adverse effects.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 25 (1983), S. 303-305 
    ISSN: 1432-1041
    Keywords: hydralazine ; indomethacin ; normal subjects ; heart rate ; blood pressure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Indomethacin 100 mg/day or matching placebo was given for 2.5 days to 9 healthy volunteers in a double-blind cross-over study, followed by an intravenous injection of 0.2 mg/kg of hydralazine. Compared to placebo, indomethacin produced no statistically significant change in pulse rate or blood pressure in both standing and supine positions. Hydralazine injection was followed by a statistically significant fall in lying and standing diastolic pressure and a rise in lying and standing pulse after both indomethacin and placebo pretreatments. There were no significant differences in these effects following indomethacin compared to placebo pretreatment. These results do not support the hypothesis that endogenous prostaglandins are involved in the mechanism of action of hydralazine.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1041
    Keywords: theophylline ; aminophylline ; slow release formulations ; bronchial asthma ; pharmacokinetics ; methods of comparison
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The pharmacokinetics of two slow release theophylline preparations “Theo-Dur” (T) containing theophylline only and “Phyllocontin” (P) containing aminophylline have been compared in 12 patients with asthma. Each patient received both treatments in random order. The dose of treatment administered 12 hourly was increased or decreased to produce plasma theophylline concentrations of 10–20 mg/l at clinic visits normally 7 to 8 h after dosing. Pharmacokinetic studies were carried out after at least one week's treatment with this dose. After the first study day patients were crossed over to the second treatment at a dosage providing a similar amount of theophylline. They returned for a second study day after at least one week. Comparison of the dose corrected AUC, time to peak concentrations, within patient coefficients of variation (CV), number of concentration time points falling within 25% of Cmax and percentage fluctuations in plasma concentration showed no significant differences between the two preparations.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 29 (1985), S. 177-179 
    ISSN: 1432-1041
    Keywords: theophylline clearance ; age ; adult age range ; normal subjects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Twenty volunteers aged between 20 and 57 years were given 197 mg of theophylline (as lysine theophylline) by iv infusion over 5 minutes to test the hypothesis that within the adult age range theophylline clearance declines with age. Samples were assayed for theophylline using the EMIT assay and clearance was determined by standard methods. Clearance values were 0.73 ml/min/kg below age 38 years and 0.75 ml/min/kg at and above age 38 years. Multiple regression analysis using age as a continuous variable showed no relationship between age and clearance.
    Type of Medium: Electronic Resource
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