Characterization of impurities in cefpodoxime proxetil using LC–MSn
نویسندگان
چکیده
Reversed-phase liquid chromatography coupled with electrospray ionization tandem mass spectrometry (ESI-MS/MS) was used to characterize impurities in cefpodoxime proxetil, an ester-modified prodrug. Based on the mechanisms by which cephalosporins are degraded, stress tests were designed and performed. The bulk material and capsule were eluted through a C18 column with formic acid-methanol-water as the mobile phase. In total, 15 impurities were characterized in commercial samples, including 7 known impurities and 8 new impurities. The structures of these unknown compounds were deduced via comparison with the fragmentation patterns of cefpodoxime proxetil. Data from this systematic study will help improve the safety and quality of cefpodoxime proxetil.
منابع مشابه
Development,characterization and Solubility Study of Solid Dispersion of Cefpodoxime Proxetil by Solvent Evaporation Method
Cefpodoxime Proxetil (Poorly water soluble drug), when prepared as solid dispersion showed improved solubility and dissolution. So the main purpose of this investigation was to increase the solubility and dissolution rate of Cefpodoxime Proxetil by the preparation of its solid dispersion with urea using solvent evaporation method. Physical mixtures and solid dispersions of Cefpodoxime Proxetil ...
متن کاملCefpodoxime Proxetil Floating Microspheres: Formulation and In Vitro Evaluation
The objective of the present study was to develop floating microspheres of cefpodoxime proxetil in order to achieve an extended retention in the upper GIT, which may result in enhanced absorption and thereby improved bioavailability. The microspheres were prepared by non-aqueous solvent evaporation method using polymers such as hydroxyl propyl methyl cellulose (HPMC K 15 M), ethyl cellulo...
متن کاملFormulation and in vitro characterization of cefpodoxime proxetil gastroretentive microballoons
BACKGROUND AND THE PURPOSE OF THE STUDY The objective of the present work was to improve bioavailability of cepodoxime proxetil through gastroretentive microballoon formulation. METHODS Microballoons of cefpodoxime proxetil were formulated by solvent evaporation and diffusion method employing hydroxypropylmethyl cellulose (HPMC) and ethyl cellulose (EC) polymers and characterized for particle...
متن کاملDual Wavelength Spectrophotometric Method for Simultaneous Estimation of Ofloxacin and Cefpodoxime Proxetil in Tablet Dosage Form
The present manuscript describe simple, sensitive, rapid, accurate, precise and cost effective dual wavelength spectrophotometric method for the simultaneous determination of ofloxacin and cefpodoxime proxetil in combined tablet dosage form. The utility of dual wavelength data processing program is its ability to calculate unknown concentration of components of interest in a mixture containing ...
متن کاملIn vitro activity of cefpodoxime proxetil (U-76,252; CS-807) against clinical isolates of Branhamella catarrhalis.
Cefpodoxime proxetil (U-76,252; CS-807) is a new esterified oral cephem antibiotic with a broad antibacterial spectrum. Since data regarding the activity of cefpodoxime against Branhamella catarrhalis are limited, we tested its activity against 200 B. catarrhalis isolates. The drug was highly active against beta-lactamase-negative and -positive isolates; 99% of all strains tested showed a cefpo...
متن کامل