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  • 1
    Electronic Resource
    Electronic Resource
    Tiagabine, a novel antiepileptic agent: lack of pharmacokinetic interaction with digoxin (1998)
    Springer
    European journal of clinical pharmacology 54 (1998), S. 355-357 
    Details
    ISSN: 1432-1041
    Keywords: Key words Tiagabine ; Digoxin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Objective: To assess the possibility of any clinically relevant pharmacokinetic interactions between tiagabine, a novel antiepileptic drug, and digoxin. Methods: Potential pharmacokinetic interactions between tiagabine and digoxin were investigated in an open-label, two-period cross-over study in healthy male volunteers. Thirteen volunteers, aged between 18 and 43 years, were randomised to receive digoxin (0.5 mg twice a day for 1 day, then 0.25 mg once a day for 8 days) either alone or co-administered with tiagabine (4 mg three times daily for 9 days). Following a 7-day wash-out period, volunteers crossed over to the other dosing regimen. Peak serum concentration, time to maximum serum concentration, area under the serum concentration–time curve from zero to 24 h and steady state serum concentration were calculated for digoxin and compared between treatment groups. Results: No statistically significant differences between treatment groups were observed for any of the derived digoxin pharmacokinetic parameters. The most common adverse events reported during digoxin alone and in combination with tiagabine were somnolence and headache; an overall greater frequency of adverse events was reported during combined treatment. Adverse events were generally mild in nature; no serious adverse events were reported. Conclusions: At the doses administered, there is no evidence of a pharmacokinetic interaction between digoxin and tiagabine in healthy male volunteers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002280050474
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The pharmacokinetics of theophylline and enprofylline in patients with liver cirrhosis and in patients with chronic renal disease (1988)
    Springer
    European journal of clinical pharmacology 35 (1988), S. 357-362 
    Details
    ISSN: 1432-1041
    Keywords: theophylline ; enprofylline ; liver cirrhosis ; renal failure ; pharmacokinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary We have studied the pharmacokinetics of theophylline and enprofylline in patients with liver cirrhosis, patients with chronic renal failure, and healthy subjects, and have assessed the predictive value of routine tests of liver function and renal function (creatinine clearance) for theophylline and enprofylline total body clearances. Theophylline clearance was significantly decreased in the patients with liver cirrhosis compared with both the patients with renal failure and the healthy subjects (the mean values in the three groups were 24, 47, and 46 ml·h−1·kg−1 respectively. Enprofylline clearance was significantly decreased in the patients with chronic renal failure, compared with both the patients with liver cirrhosis and the healthy subjects (the values in the three groups were 64, 250, and 289 ml·h−1·kg−1 respectively. There was a strong correlation between creatinine clearance and enprofylline clearance, while there was only a poor correlation between the liver function tests and theophylline clearance. It appears that in various clinical situations enprofylline elimination can be predicted more precisely than theophylline elimination, which may make the drug safer in clinical practice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00561364
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Creation of four consecutive instantaneous steady-state plasma concentration plateaus of theophylline and enprofylline by repeated infusions with exponentially decreasing delivery rates (1988)
    Springer
    European journal of clinical pharmacology 35 (1988), S. 657-661 
    Details
    ISSN: 1432-1041
    Keywords: theophylline ; enprofylline ; asthma ; pharmacokinetics ; intravenous infusion ; plateau levels
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Repeated exponentially decreasing influsions have been used to administer theophylline and enprofylline to show whether it would be feasible to create consecutive plasma concentration plateaus within a few hours. The infusions were carried out on two separate days in 8 stable asthmatics. Before the infusion experiments, the pharmacokinetics of the substances in the individual subjects were determined on a separate day. Plasma concentration rose to the desired level within 5 min after the start of the infusion at each dose level and a stable plasma concentration plateau was maintained during the following 90 min of the infusion. It was possible to achieve 4 subsequent concentration plateaus within a 6 h period. Use of this infusion method resulted in predictable plasma concentrations at all levels and so the method appears safe when the required plasma concentrations are below the toxic level. Apart from clinical situations where effective dosages of drugs must be administered rapidly, the method showed be useful in pharmacological dose-response studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00637603
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    Paper (German National Licenses)
    Fulltext
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