Linked Life Data

7056280

Source:http://linkedlifedata.com/resource/pubmed/id/7056280

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1982-4-12
pubmed:abstractText
7-3H-phenylephrine was given to 15 volunteers by a short-infusion n = 4) or p.o. (10 volunteers, 1 patient with porto-caval anastomosis). Analysis of serum for free 3H-phenylephrine and fractionation of urinary radioactivity was performed by ion-exchange and thin-layer chromatography. As almost the same 3H-activity was excreted in urine after i.v. and p.o. administration, 86% and 80% of the dose respectively, complete enteral absorption can be assumed. A considerable difference was seen in the fraction of free phenylephrine, i.v. 16% of the dose versus p.o. 2.6%, which suggested reduced bioavailability. This was confirmed by comparison of the areas under the serum curve, which showed a bioavailability factor of 0.38. The result for the patient with porto-caval anastomosis was comparable to that in the normal volunteers. The biological half-life of 2 to 3h was comparable to that of structurally related amines, as were the total clearance of 2 l/h, and the volume of distribution of 340 l. Metabolism to phenolic conjugates mainly after oral ingestion, and to m-hydroxymandelic acid after i.v. injection, again demonstrated that m-hydroxylated amines are predominantly conjugated during the "first-pass" metabolism.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0031-6970
pubmed:author
pubmed:issnType
Print
pubmed:volume
21
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
335-41
pubmed:dateRevised
2004-11-17
pubmed:meshHeading
pubmed:year
1982
pubmed:articleTitle
Pharmacokinetics of 3H-phenylephrine in man.
pubmed:publicationType
Journal Article