A sustained-release pharmaceutical preparation comprising an admixture of uncoated and/or single walled water soluble drug, such as aspirin, and dual walled coated drug. The dual wall structure has an inner wall microencapsular control coating, such as ethyl cellulose, and an outer wall enteric coating such as cellulose acetate phthalate. The dual walled coated drug has a delayed, gradual, long-term release which takes place in the intestines while the uncoated and/or single walled drug has immediate therapeutic properties upon dissolution in the stomach. The outer wall enteric coating may be applied to microencapsulated core drug by a coacervation, spray coating or other process.
YAMATO M.; ISHIKAWA T.; NAGAMATSU T.; YOSHIKAWA S.; KOYAMA T., CHEM. AND PHARM. BULL., 1980, 28, NO 3, 723-729
作者:YAMATO M.、 ISHIKAWA T.、 NAGAMATSU T.、 YOSHIKAWA S.、 KOYAMA T.
DOI:——
日期:——
IMAGING TECHNIQUES AND ASSOCIATED APPARATUS
申请人:Teraview Limited
公开号:EP1581799A1
公开(公告)日:2005-10-05
Imaging techniques and associated apparatus
申请人:Cole E. Bryan
公开号:US20060235621A1
公开(公告)日:2006-10-19
Imaging techniques of pharmaceutical preparations such as tablets are disclosed. The techniques combine the measurement of reflected/transmitted terahertz radiation originating from within the tablet and data analysis localised in frequency and time in order to enable a three dimensional image indicating composition to be obtained.