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  • 1
    Electronic Resource
    Electronic Resource
    A double-blind comparison of the pharmacodynamic effects of single doses of lofepramine, amitryptyline and placebo in elderly subjects (1987)
    Springer
    European journal of clinical pharmacology 33 (1987), S. 505-509 
    Details
    ISSN: 1432-1041
    Keywords: lofepramine ; amitryptyline ; anticholinergic effect ; adverse effects ; psychometric tests
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary In a double-blind five-way cross-over study, six drug free healthy elderly subjects received single oral doses of lofepramine (70 mg, 105 mg and 140 mg), amitriptyline (50 mg) and matched placebo tablets. A dose related increase in plasma drug levels and pharmacological effects of lofepramine was observed. Lofepramine (140 mg) improved psychomotor performance (choice reaction time and letter cancellation), but no such change was seen with lower dose regimes or placebo. No significant differences between lofepramine and placebo were observed in other parameters measured. Amitriptyline, as expected, reduced salivary volume, produced drowsiness and impaired psychomotor performance. These changes correlated with plasma amitriptyline levels. The incidence of subjective side-effects with amitryptyline was also higher than that of lofepramine or placebo. In the dosage used, lofepramine exhibited no deleterious effect on the peripheral cholinergic system or psychomotor performance. This drug therefore is likely to be a relatively safe antidepressant for the elderly, but further investigations during long-term medication are required to verify these observations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00544244
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  • 2
    Electronic Resource
    Electronic Resource
    Pharmacokinetics and pharmacodynamics of the ace inhibitor benazepril hydrochloride in the elderly (1990)
    Springer
    European journal of clinical pharmacology 38 (1990), S. 379-385 
    Details
    ISSN: 1432-1041
    Keywords: benazepril ; benazeprilat ; ACE inhibitor ; pharmacokinetics ; pharmacodynamics ; elderly ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The pharmacokinetics and pharmacodynamics of a single oral dose benazepril·HCl 10 mg have been studied in 15 healthy volunteers aged 65 to 80 y. The kinetics of unchanged benazepril and its active metabolite benazeprilat did not differ significantly in males and females, so the combined kinetic data from all 15 elderly subjects were compared with a historical control group of 19–32 year-old healthy men treated in the same way. The disposition of benazepril was not affected by age. The time to maximum plasma concentration, tmax (0.5 h) and elimination half-life (0.6 h) in the elderly were the same as in young subjects. The kinetics of benazeprilat was slightly changed in the elderly; although its tmax (1.5 h) was not affected, Cmax and the AUC were 20–40% greater. The elimination half-life of benazeprilat during the first 24 h after doing in the elderly was increased by about 20% to 3.2 h. The renal plasma clearance of benazeprilat (18.1 ml·min−1) was about 20% smaller than in the young subjects. An average of 18.5% of the dose was recovered as benazeprilat in the 24 h urine from the elderly subjects, which was similar to the recovery in the young subjects. Both benazepril and benazeprilat were highly bound to serum proteins (96 and 95%, respectively). Mean systolic and diastolic blood pressures in the elderly were reduced by a maximum of 37/16 mm Hg at 6 h, in association with a small rise in pulse rate. Treatment was generally well tolerated. Three of the 15 subjects reported clinical adverse experiences judged to be possibly drug related, namely headache, abdominal pain and cold extremities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00315579
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    Paper (German National Licenses)
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