title: Quantitation of itopride in human serum by high-performance liquid chromatography with fluorescence detection and its application to a bioequivalence study.
abstract: A new method was developed for determination of itopride in human serum by reversed phase high-performance liquid chromatography (HPLC) with fluorescence detection (excitation at 291 nm and emission at 342 nm). The method employed one-step extraction of itopride from serum matrix with a mixture of tert-butyl methyl ether and dichloromethane (70:30, v/v) using etoricoxib as an internal standard. Chromatographic separation was obtained within 12.0 min using a reverse phase YMC-Pack AM ODS column (250 mm x 4.6 mm, 5 microm) and an isocratic mobile phase constituting of a mixture of 0.05% tri-fluoro acetic acid in water and acetonitrile (75:25, v/v) flowing at a flow rate of 1.0 ml/min. The method was linear in the range of 14.0 ng/ml to 1000.0 ng/ml. The lower limit of quantitation (LLOQ) was 14.0 ng/ml. Average recovery of itopride and the internal standard from the biological matrix was more than 66.04 and 64.57%, respectively. The inter-day accuracy of the drug containing serum samples was more than 97.81% with a precision of 2.31-3.68%. The intra-day accuracy was 96.91% or more with a precision of 5.17-9.50%. Serum samples containing itopride were stable for 180.0 days at -70+/-5 degrees C and for 24.0 h at ambient temperature (25+/-5 degrees C). The method was successfully applied to the bioequivalence study of itopride in healthy, male human subjects.
authors.affiliation: Zydus Research Centre, Sarkhej-Bavla N.H. No. 8A, Moraiya, Ahmedabad 382213, India. sonusingh@zyduscadila.com
authors.forename: Sonu Sundd
authors.initials: SS
authors.lastname: Singh
authors.forename: Manish
authors.initials: M
authors.lastname: Jain
authors.forename: Kuldeep
authors.initials: K
authors.lastname: Sharma
authors.forename: Bhavin
authors.initials: B
authors.lastname: Shah
authors.forename: Meghna
authors.initials: M
authors.lastname: Vyas
authors.forename: Purav
authors.initials: P
authors.lastname: Thakkar
authors.forename: Ruchy
authors.initials: R
authors.lastname: Shah
authors.forename: Shriprakash
authors.initials: S
authors.lastname: Singh
authors.forename: Brajbhushan
authors.initials: B
authors.lastname: Lohray
mesh_terms: D000042:Absorption; D000328:Adult; D001549:Benzamides / Q000097:blood* / Q000302:isolation & purification / Q000493:pharmacokinetics; D001593:Benzyl Compounds / Q000097:blood* / Q000302:isolation & purification / Q000493:pharmacokinetics; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004355:Drug Stability; D005615:Freezing; D006801:Humans; D008297:Male; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013050:Spectrometry, Fluorescence; D013810:Therapeutic Equivalency
chemical_list: D001549:Benzamides; D001593:Benzyl Compounds; C102254:itopride