title: A rapid and sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the estimation of rivastigmine in human plasma.
abstract: A rapid and sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) method has been developed and validated for the estimation of rivastigmine in human plasma. Rivastigmine was extracted from human plasma by using solid-phase extraction technique. Zolpidem was used as the internal standard. A Betabasic-8 column provided chromatographic separation of analytes followed by detection with mass spectrometry. The mass transition ion-pair was followed as m/z 251.20-->206.10, 86.20 for rivastigmine and m/z 308.10-->235.10 for zolpidem. The method involves a rapid solid-phase extraction from plasma, simple isocratic chromatographic conditions and mass spectrometric detection that enables detection at sub-nanogram levels. The proposed method has been validated for a linear range of 0.2-20.0 ng/ml with a correlation coefficient > or =0.9988. The intra-run and inter-run precision and accuracy were within 10.0%. The overall recoveries for rivastigmine and zolpidem were 86.28% and 87.57%, respectively. The total run time was 2.0 min. The developed method was applied for the determination of the pharmacokinetic parameters of rivastigmine following a single oral administration of a 3 mg rivastigmine capsule in 20 healthy male volunteers.
authors.affiliation: Bioanalytical Laboratory, Torrent Research Center, Gandhinagar-382428, Gujarat, India. jigneshbhatt@torrentpharma.com
authors.forename: Jignesh
authors.initials: J
authors.lastname: Bhatt
authors.forename: Gunta
authors.initials: G
authors.lastname: Subbaiah
authors.forename: Sandeep
authors.initials: S
authors.lastname: Kambli
authors.forename: Bhavin
authors.initials: B
authors.lastname: Shah
authors.forename: Samita
authors.initials: S
authors.lastname: Nigam
authors.forename: Mehul
authors.initials: M
authors.lastname: Patel
authors.forename: Ashish
authors.initials: A
authors.lastname: Saxena
authors.forename: Ashok
authors.initials: A
authors.lastname: Baliga
authors.forename: Hetal
authors.initials: H
authors.lastname: Parekh
authors.forename: Gunvat
authors.initials: G
authors.lastname: Yadav
mesh_terms: D000284:Administration, Oral; D002800:Cholinesterase Inhibitors / Q000097:blood* / Q000493:pharmacokinetics; D006801:Humans; D008297:Male; D048448:Phenylcarbamates / Q000097:blood* / Q000493:pharmacokinetics; D012015:Reference Standards; D015203:Reproducibility of Results; D000068836:Rivastigmine; D012680:Sensitivity and Specificity; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: D002800:Cholinesterase Inhibitors; D048448:Phenylcarbamates; D000068836:Rivastigmine