title: Development and validation of a reversed-phase HPLC method for determination of nitrendipine in rat plasma: application to pharmacokinetic studies.
abstract: A simple and sensitive method for the determination of nitrendipine in rat plasma was developed using high-performance liquid chromatography (HPLC). The procedure involves extraction of nitrendipine in dichloromethane/sodium hydroxide, followed by reversed phase HPLC using a Waters, Spherisorb ODS2 (250 x 4.6 mm, 5 microm) column and UV detection at 238 nm. The retention times of nitrendipine and internal standard (felodipine) were 5.0 min and 7.5 min, respectively. The calibration curves were linear over the range of 5 ng/mL (lower limit of quantification, LOQ) to 200 ng/mL for nitrendipine. The intra- and inter-day coefficients of variation for all criteria of validation were less than 15% over the linearity range. The sensitivity and precision of the method were within the accepted limits (< 15%) throughout the validation period. The present method was also successfully applied for the study of plasma pharmacokinetics of nitrendipine loaded solid lipid nanoparticles (SLN) in rats.
authors.affiliation: Pharmacology Division, Indian Institute of Chemical Technology, Tarnaka, Hyderabad, Andhra Pradesh, India.
authors.forename: Vinay Kumar
authors.initials: VK
authors.lastname: Venishetty
authors.forename: Chandrasekar
authors.initials: C
authors.lastname: Durairaj
authors.forename: Ramakrishna
authors.initials: R
authors.lastname: Sistla
authors.forename: Madhusudhan Rao
authors.initials: MR
authors.lastname: Yamsani
authors.forename: Prakash V
authors.initials: PV
authors.lastname: Diwan
mesh_terms: D000818:Animals; D002121:Calcium Channel Blockers / Q000097:blood* / Q000493:pharmacokinetics; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D008297:Male; D009568:Nitrendipine / Q000097:blood* / Q000493:pharmacokinetics; D051381:Rats; D017208:Rats, Wistar; D012015:Reference Standards; D012680:Sensitivity and Specificity
chemical_list: D002121:Calcium Channel Blockers; D009568:Nitrendipine