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압축코팅법에 의한 3단계 약물방출형 지속성제제의 제조 및 용출특성
Preparation and Dissolution Characteristics of the Compression - Coated Controlled Release Tablet Exhibiting Three - step Release
김철수(Cheol Soo Kim), 권혁노(Hyeok Lo Kwon), 차봉진(Bong Jin Cha), 권종원(Jong Won Kwon), 양중익(Joong Ik Yang), 민신홍(Shin Hong Min)
약제학회지 22권 2호 133-137(5pages)
UCI I410-ECN-0102-2008-510-000806009

A novel oral controlled release tablet which may offer more uniform drug level in the body than simple zero-order was developed. The tablet is composed of three layers; outer film layer, middle part compression-coated hydroxypropylmethylcellulose (HPMC) matrix layer, and inner core layer. Each layer contains nicardipine HCl as a model drug. In vitro dissolution test showed that the tablet released the drug in clear three steps; a rapid initial release, followed by a constant rate of release, and then a second phase of fast release of drug. The dissolution characteristics could be modified easily by changing the grade of HPMC, thickness of matrix layer, content of methylcellulose in matrix layer, content of active ingredient in each layer. The pH of dissolution medium did not affect the release profile. This three-step release system is expected to raise the blood concentration rapidly to effective level and to maintain effective blood level longer than simple slow-release systems.

[자료제공 : 네이버학술정보]
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