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The role of gamma-scintigraphy in oral drug delivery.

Authors
Type
Published Article
Journal
Advanced Drug Delivery Reviews
0169-409X
Publisher
Elsevier
Publication Date
Volume
46
Issue
1-3
Pages
103–124
Identifiers
PMID: 11259836
Source
Medline

Abstract

The gastrointestinal tract is usually the preferred site of absorption for most therapeutic agents, as seen from the standpoints of convenience of administration, patient compliance and cost. In recent years there has been a tendency to employ sophisticated systems that enable controlled or timed release of a drug, thereby providing a better dosing pattern and greater convenience to the patient. Although much about the performance of a system can be learned from in vitro release studies using conventional and modified dissolution methods, evaluation in vivo is essential in product development. The non-invasive technique of gamma-scintigraphy has been used to follow the gastrointestinal transit and release characteristics of a variety of pharmaceutical dosage forms. Such studies provide an insight into the fate of the delivery system and its integrity and enable the relationship between in vivo performance and resultant pharmacokinetics to be examined (pharmacoscintigraphy).

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