Linked Life Data

7293791

Source:http://linkedlifedata.com/resource/pubmed/id/7293791

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1981-12-22
pubmed:abstractText
The pharmacokinetics of orally administered doxepin (50 mg) was studied in 8 healthy volunteers. Doxepin (DOX) and desmethyldoxepin (DDOX) concentrations in serum (or plasma) and red blood cells (RBCs) were measured by radioimmunoassay. Peak serum concentrations of DOX were observed at 1-2 hours and they ranged between 59.1-107.4 nmol/1. DOX disappearance was biphasic with a mean distribution half-life of 2.0 hrs and elimination half-life of 17.9 hrs. The mean total apparent volume of distribution was 22.7 l/kg and plasma clearance 0.93 l/hr/kg. The estimated mean first-pass metabolism of DOX was 71% assuming complete absorption. Peak DDOX concentrations were observed at 1-6 hours and they ranged between 35.0-117.8 nmol/l. DDOX elimination was monophasic with a mean apparent half-life of 28.5 hours. Equilibrium dialysis gave a mean protein binding of 75.5% for DOX and 76.0% for DDOX. A highly time dependent and interindividually variable RBC/plasma concentration ratio was observed for both substances. Initially the plasma concentrations were 3-4 times higher than the respective RBC concentrations, but at later time points more DOX and DDOX could be found from the RBCs than from plasma. The major reason for this seemed to be a slower elimination of both drugs from the erythrocytes than from plasma.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0001-6683
pubmed:author
pubmed:issnType
Print
pubmed:volume
47
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
371-6
pubmed:dateRevised
2004-11-17
pubmed:meshHeading
pubmed:year
1980
pubmed:articleTitle
Single dose pharmacokinetics of doxepin in healthy volunteers.
pubmed:publicationType
Journal Article