ENCAPSULATION OF WATER-SOLUBLE DRUGS BY A MODIFIED SOLVENT EVAPORATION METHOD .1. EFFECT OF PROCESS AND FORMULATION VARIABLES ON DRUG ENTRAPMENT

被引：165

作者：

ALEX, R ^{[1
]}

BODMEIER, R ^{[1
]}

机构：

[1] UNIV TEXAS,COLL PHARM,AUSTIN,TX 78712

来源：

JOURNAL OF MICROENCAPSULATION | 1990年 / 7卷 / 03期

关键词：

D O I：

10.3109/02652049009021845

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Pseudoephedrine HCl, a highly water-soluble drug, was entrapped within poly (methyl methacrylate) microspheres by a water/oil/water emulsification-solvent evaporation method. An aqueous drug solution was emulsified into a solution of the polymer in methylene chloride, followed by emulsification of this primary emulsion into an external aqueous phase to form a water/oil/water emulsion. The middle organic phase separated the internal drug-containing aqueous phase from the continuous phase. Microspheres were formed after solvent evaporation and polymer precipitation. The drug content of the microspheres increased with increasing theoretical drug loading, increasing amounts of organic solvent, polymer and polymeric stabilizer, and decreased with increasing stirring time, increasing pH of the continuous phase and increased volume of the internal and external aqueous phase. © 1990 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted.

引用

页码：347 / 355

页数：9

共 12 条

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