Human plasma samples were analysed for vestipitant using a
validated analytical method based on protein precipitation,
followed by ultra high pressure liquid chromatography tandem
mass spectroscopy (UHPLC-MS-MS) analysis. Using a 50 ml
aliquot of human plasma, the lower limit of quantification for
vestipitant was 1 ng ml21 and the higher limit of quantification
was 2000 ng ml21
.