사홍기 교수

The objective of this study was to formulate itraconazole semisolid dosage forms and characterize their physicochemical properties. Itraconazole and excipients such as polysorbate 80, fatty acids, fatty alcohols, oils and organic acids were melted at 160oC. The fused solution was then cooled immediately at -10oC to make wax-like semisolid preparations. Their physicochemical attributes were first characterized using differential scanning calorimetry, Fourier transform infrared spectroscopy and nu

- The objective of this study was to investigate the dissolution patterns of a variety of orally administered drug products available on the market. It aimed to understand their dissolution behaviors on the basis of the biopharmaceutics classification system (BCS) concept. On the tenets of BCS, several active pharmaceutical ingredients were selected: fluoxetine hydrochloride (class I), naproxen sodium (class II), pyridostigmine bromide (class III), furosemide (class IV) and simvastatin (class IV

The objective of this study was to provide a better understanding of SUPAC-IR and its application in handling postapproval changes to immediate release solid oral dosage forms. Originally, SUPAC-IR was aimed at reducing the regulatory burdern of the industry when they were making postapproval changes, but still at maintaining the formulation quality and performance of a drug product. The postapproval changes that were covered under SUPAC-IR included variations in the components and composition o

objective of this report is to introduce the European Union's variation rules governing medicinal products that are subject to post-approval changes. The EMEA outlines a variety of changes occurring to approved medicinal products. It also recommends a marketing authorisation holder to follow specific post-approval applications in various situations. For instance, the Commission Regulation (EC) No 1085/2003 explains variation types and suggests post-authorisation procedures with which an applican

The objective of this study was to investigate the patterns of protein leaching to an external phase during anethyl acetate-based, double emulsion microencapsulation process. An aqueous protein solution (lactoglobulin, lysozyme, orribonuclease; W1) was emulsified in ethyl acetate containing poly-d,l-lactide-co-glycolide 75:25. The W1/O emulsion wastransfered to a 0.5% polyvinyl alcohol solution saturated with ethyl acetate (W2). After the double emulsion was stirred for5, 15, 30, or 45 min, addi

The objective of this study was to investigate the stability of tetracycline HCl on encapsulation into and inside reverse micelles. To do so, tetracycline HCl was first mixed with cetyltrimethylammonium bromide, water and ethyl formate to make reverse micelles. The degradation kinetics of tetracycline HCl inside the reverse micelles was then assessed by scrutinizing its stability data. Under our experimental conditions, the reverse micelles formed spontaneously in absence of any mixing devices.

The objective of this study was to scrutinize the rationale of SUPAC-MR and its application in processing postapproval changes to modified release solid oral dosage forms. The types of postapproval changes that were primarily covered with SUPAC-MR included variations in the components and composition, the site of manufacturing, batch size, manufacturing equipment, and manufacturing process. SUPAC-MR defined levels of postapproval changes that the industry might make. Classification of such categ

The objective of this study was to explore the principles of SUPAC-SS and its regulatory application in handling postapproval changes to nonsterile semisolid dosage forms. The types of postapproval changes that SUPAC-SS described were modifications in formulation (components and composition), batch size, manufacturing equipment & process, and the site of manufacturing. SUPAC-SS defined the levels of postapproval changes and what chemistry, manufacturing, and control tests should be conducted for

Drug dissolution test has been used for the purpose of both quality control of solid oral dosage forms and predicting in vivo drug release profiles. In this study, the dissolution profiles of buflomedil hydrochloride tablets and ticlopidine hydrochloride tablets were investigated according to the “Guidelines on Specifications of Dissolution tests for Oral dosage forms” of Korean Pharmacopoeia (KP). The analytical method using HPLC was validated. The validation was performed in terms of specifici

Although the dissolution test can serve as an effective tool for quality control and predictor of in vivo performance,there are a number of drugs with no established dissolution specifications in Korean Pharmaceutical Codex (KPC). Among those commercially available, Piracetam Tablets and Fenoterol hydrobromide Tablets were selected to develop the dissolution testing method. The dissolution condition was determined based on the "Guidelines on Specifications of Dissolution tests for Oral dosage fo

Despite the fact that the dissolution test can serve as an effective tool for drug quality control and prediction of in vivo drug performance, there are a number of drugs with no established dissolution specifications because they were developed quite a long time ago. Under this circumstances, KFDA started the new project that establishes dissolution method and specifications for drugs with no dissolution specifications listed in the Korea Pharmaceutical Codex (KPC). This project aims for promot