Linked Life Data

20655999

Source:http://linkedlifedata.com/resource/pubmed/id/20655999

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
2010-9-6
pubmed:abstractText
The purpose of the present study was to investigate the oral absorption simulation of free base drugs. In the case of a low solubility free base drug, a portion of drug particles remains incompletely dissolved during the stomach transit and can reach the small intestine. As the pH is neutralized in the small intestine, the solubility of the drug decreases and the concentration gradient around the particles becomes a negative value. The drug particles would then grow because of this negative concentration gradient resulting in a reduction of the dissolved drug concentration. The modified Nernst Brunner equation was used to simulate both particle dissolution and growth (particle growth is the opposite phenomena of particle dissolution). Albendazole, aprepitant, dipyridamole, gefitinib and ketoconazole were used as model drugs (all free solid form (not salts)). The effect of stomach pH on oral absorption was appropriately simulated. Based on the simulation results, it was suggested that the dissolution patterns in the gastrointestinal tract were significantly different depending on the dose-solubility ratio in the stomach.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
1873-3476
pubmed:author
pubmed:copyrightInfo
Copyright 2010 Elsevier B.V. All rights reserved.
pubmed:issnType
Electronic
pubmed:day
15
pubmed:volume
398
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
73-82
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Computational oral absorption simulation of free base drugs.
pubmed:affiliation
Global Research & Development, Sandwich Laboratories, Research Formulation, Pfizer Inc., CT13 9NJ Sandwich, Kent, UK. Kiyohiko.Sugano@pfizer.com
pubmed:publicationType
Journal Article, Comparative Study