Preparation of delayed release tablet dosage forms by compression coating: effect of coating material on theophylline release.
In this study, compression-coated tablets were prepared and examined by real-time swelling/erosion analysis and dissolution studies. Of the coating materials, PVP showed no swelling behavior and had no impact on theophylline release. Polyox(®) exhibited swelling behavior of an entangled polymer, which was reflected in its > 14-hour delayed-release profile. Hydroxypropyl methylcellulose (HPMC), which revealed the characteristics of a disentangled polymer, caused a 2-h delay in theophylline release. Based on preliminary texture analysis data, Polyox(®)/PVP blends were used as coating materials to manipulate the onset of drug release from the compression-coated tablets. Of the blends, at a 1:1 ratio, for example, resulted in a burst release after 10 h, which demonstrated the feasibility of preparing delayed release dosage forms by compression coating. Furthermore, it was feasible to predict the dissolution behavior of polymers from their swelling/erosion data, which were generated from texture analysis.
Department of Basic Pharmaceutical Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, Louisiana 71209-0497, USA.
Yasser
Y
El-Malah
Sami
S
Nazzal
D002626:Chemistry, Pharmaceutical / Q000379:methods*; D019245:Compressive Strength; D003692:Delayed-Action Preparations / Q000737:chemistry / Q000493:pharmacokinetics; D004304:Dosage Forms; D011108:Polymers / Q000737:chemistry* / Q000493:pharmacokinetics; D012995:Solubility; D013608:Tablets, Enteric-Coated; D013806:Theophylline / Q000737:chemistry* / Q000493:pharmacokinetics
D003692:Delayed-Action Preparations; D004304:Dosage Forms; D011108:Polymers; D013608:Tablets, Enteric-Coated; D013806:Theophylline