Linked Life Data

15902983

Source:http://linkedlifedata.com/resource/pubmed/id/15902983

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2005-5-20
pubmed:abstractText
We determined the pharmacokinetics of ethyl loflazepate (Lof) in elderly patients who died of benzodiazepine-related toxicity. Three elderly patients with body mass indexes of less than 17 kg/m2 died of asphyxia after having taken maintenance doses of Lof for 2 to 3 weeks. We measured serum concentrations of the active metabolites of Lof using gas chromatography-mass spectrometry and a benzodiazepine receptor assay to determine the pharmacokinetics of each. On admission, the serum concentrations of the active metabolites of Lof ([Lofl) were 256 ng/mL, 425 ng/mL, and 177 ng/mL in cases 1, 2, and 3, respectively. Serum benzodiazepine-receptor binding activities, expressed as diazepam equivalent concentrations ([Bz]), were 1800 ng/mL, 2200 ng/mL, and 1500 ng/mL. The T1/2(beta) of [Lof] were 124 and 121 h in cases 1 and 2 and the T1/2(beta) of [Bz] were 75 and 87 h. The distribution volume in the elderly was reduced due to a small lipid compartment, and total drug clearance was decreased due to the decline in liver and kidney function. These changes did not prolong T1/2(beta) but did increase plasma concentrations of active metabolites, especially in case 2, and a slight decrease in protein binding increased the amount of free active metabolites greatly.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0146-4760
pubmed:author
pubmed:issnType
Print
pubmed:volume
29
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
140-4
pubmed:dateRevised
2010-11-18
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
Pharmacokinetics of the active metabolites of ethyl loflazepate in elderly patients who died of asphyxia associated with benzodiazepine-related toxicity.
pubmed:affiliation
Department of Emergency and Critical Care Medicine, Kitasato University, School of Medicine, 1-15-1 Kitasato, Sagamihara Kanagawa 228-8555, Japan. yk119@kitasato-u.ac.jp
pubmed:publicationType
Journal Article, Case Reports