The Study of Stability of Oral Pharmaceutical Liquid Preparations I

The available period of oral pharmaceutical liquid preparations was decided according to the study of the stability of unopened preparations. But if one reuses the drug after opening the sealed cap, the major components of the drug could change in quality. In addition, there isn｀t any accurate information about the available period of opened oral pharmaceutical liquid preparations. In this study, a long term test, an accelerated test and a microbial limit test are run with A (acetaminophen), B (L-carbocysteine) that are markdted and used frequently. (omitted)