Abstract:
:The plasma protein binding of drugs, particularly those that are highly bound, may have significant clinical implications. Although protein binding is a major determinant of drug action, it is only one of a myriad of factors that influence drug disposition. The extent of protein binding is a function of drug and protein concentrations, the affinity constant for the drug-protein interaction and the number of protein binding sites per class of binding site. Age-related changes in protein binding are usually not clinically important in drug therapy. Albumin levels are generally decreased in the elderly, whereas alpha1-acid glycoprotein levels are not altered by age per se. Alterations in plasma protein binding that occur in the elderly are generally not attributed to age, but rather to physiological and pathophysiological changes or disease states that may occur more frequently in the elderly and most often account for altered protein binding. Age-related physiological changes, such as decreased renal function, decreased hepatic function and decreased cardiac output, generally produce more clinically significant alterations in drug disposition than that seen with alterations in drug plasma protein binding. An understanding of the inter-relationships between drug concentrations, protein binding, the physiology of aging, disease, pharmacokinetics and pharmacodynamics is necessary for effective therapeutic monitoring. Monitoring of unbound drug concentrations simplifies these relationships and provides the fundamental information needed for dosage regimen development and adjustment. Drug therapy in the elderly should be individualised taking into account all of these factors.
journal_name
Clin Pharmacokinetjournal_title
Clinical pharmacokineticsauthors
Grandison MK,Boudinot FDdoi
10.2165/00003088-200038030-00005keywords:
subject
Has Abstractpub_date
2000-03-01 00:00:00pages
271-90issue
3eissn
0312-5963issn
1179-1926journal_volume
38pub_type
杂志文章,评审abstract::Few of the articles published on antibiotics and pregnancy are concerned with pharmacokinetics. It is particularly difficult to evaluate possible alterations in pharmacokinetic parameters that may be due to pregnancy. Most data available have been obtained in connection with abortion or delivery. Such data may not be ...
journal_title:Clinical pharmacokinetics
pub_type: 杂志文章,评审
doi:10.2165/00003088-197904040-00003
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abstract:BACKGROUND AND OBJECTIVE:Losmapimod is an orally available, potent p38 mitogen-activated protein kinase inhibitor. It is in development as an anti-inflammatory drug in different therapeutic areas. Clinical studies have shown that losmapimod is well tolerated and safe in humans and several studies have shown its pharmac...
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pub_type: 杂志文章,随机对照试验
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更新日期:2013-03-01 00:00:00
abstract::The effects of anaesthesia and surgery on the pharmacokinetics of ketobemidone were studied in 12 patients. Plasma ketobemidone concentrations were assayed with a mass-fragmentographic method. The peroperative Vd(area) was 5.9 +/- 2.6L/kg and the terminal half-life was 3.9 +/- 1.7 h. In the postoperative period Vd(are...
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doi:10.2165/00003088-198207030-00005
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journal_title:Clinical pharmacokinetics
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pub_type: 杂志文章
doi:10.2165/00003088-199324040-00007
更新日期:1993-04-01 00:00:00
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pub_type: 杂志文章
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更新日期:2017-11-01 00:00:00
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更新日期:2019-07-01 00:00:00
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journal_title:Clinical pharmacokinetics
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.2165/00003088-200544080-00007
更新日期:2005-01-01 00:00:00
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journal_title:Clinical pharmacokinetics
pub_type: 杂志文章,评审
doi:10.2165/00003088-198916040-00002
更新日期:1989-04-01 00:00:00
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journal_title:Clinical pharmacokinetics
pub_type: 杂志文章,多中心研究,随机对照试验
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pub_type: 临床试验,杂志文章
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pub_type: 杂志文章,评审
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更新日期:1985-05-01 00:00:00
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journal_title:Clinical pharmacokinetics
pub_type: 杂志文章,评审
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更新日期:1995-09-01 00:00:00
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journal_title:Clinical pharmacokinetics
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更新日期:1981-07-01 00:00:00
abstract::Dasabuvir is a nonstructural (NS) 5B non-nucleoside inhibitor of the hepatitis C virus (HCV) used in combination with ombitasvir/paritaprevir/ritonavir for the treatment of chronic HCV infection. It is primarily metabolized by cytochrome P450 (CYP) 2C8, with a minor contribution from CYP3A. Biotransformation of dasabu...
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更新日期:2017-10-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:1988-06-01 00:00:00
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pub_type: 杂志文章,meta分析
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更新日期:2013-10-01 00:00:00
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journal_title:Clinical pharmacokinetics
pub_type: 杂志文章,评审
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更新日期:1998-08-01 00:00:00
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pub_type: 临床试验,杂志文章,随机对照试验
doi:10.2165/00003088-200039001-00004
更新日期:2000-01-01 00:00:00