Use of scoring to induce reproducible drug delivery from osmotic pulsatile tablets.

Abstract:

:An osmotic-controlled pulsatile delivery technology was developed for targeted drug delivery. This novel system consists of a tablet core surrounded by an osmotic coating that has been mechanically compromised in strategic locations to facilitate reliable drug release at a given time point after administration. The tablet core contains a high drug load in addition to several osmotic agents and swellable polymers, and the surrounding mechanically-compromised osmotic coating consists of a semipermeable membrane that has been scored with a razor blade in several key locations. The components in the tablet core attract water into the core, causing it to swell and propagate the scores in the coating along the length of the tablet. After the scores have fully propagated, the coating bursts open, releasing the tablet core's contents, including the drug, into the surrounding media. The variables that were investigated in this study included the configuration of the scores in the coating, the length of the scores, and the distance between the scores. The delivery system developed in this work is able to generate a reproducible dissolution profile consisting of a specific targeted lag time, between five minutes and two hours, followed by immediate release of the drug from the core. The performance of the system was validated in vitro using the drug salicylic acid. Unlike previously developed osmotic pulsatile delivery systems, the present system is able to accommodate higher drug loading levels, it is easier to manufacture, and has demonstrated more reproducible burst times (i.e. burst time) than several other pulsatile systems.

journal_name

Pharm Dev Technol

authors

Rahemba TR,Bell S,Connolly EK,Waterman KC

doi

10.1080/10837450902838692

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

548-55

issue

5

eissn

1083-7450

issn

1097-9867

journal_volume

14

pub_type

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