title: Determination of bezafibrate, ciprofibrate and fenofibric acid in human plasma by high-performance liquid chromatography.
abstract: A selective high-performance liquid chromatographic method to assess either bezafibrate, ciprofibrate or fenofibric acid plasma levels is described. Drugs are extracted with diethyl ether, after acidification with HCL. An isocratic acetonitrile 0.02 M H3PO4 (55:45) mobile phase, a C18 microns) column and UV detection are used. The LOQ found was 0.25 microgram/ml for the three fibrates. Intra- and inter-assay accuracy ranges were 90-107% and 82-111%: 96-115% and 94-107%: 94-114% and 94-126% for bezafibrate, ciprofibrate and fenofibric acid, respectively. Intra- and inter-assay precision (C.V.% ranges) were 1.72-3.06% and 2.66-7.67%: 1.88-4.64% and 0.62-2.99%: 1.26-4.69% and 3.56-7.17% for the three fibrates studied. Its sensitivity, accuracy and precision make it a useful tool for monitoring plasma levels of these drugs in a clinical setting and for research purposes.
authors.affiliation: Basic Sciences Research Institute (HCB), Dr. René G. Favaloro University Foundation, Solis, Buenos Aires, Argentina.
authors.forename: L D
authors.initials: LD
authors.lastname: Masnatta
authors.forename: L A
authors.initials: LA
authors.lastname: Cuniberti
authors.forename: R H
authors.initials: RH
authors.lastname: Rey
authors.forename: J P
authors.initials: JP
authors.lastname: Werba
mesh_terms: D001629:Bezafibrate / Q000097:blood*; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D002995:Clofibric Acid / Q000031:analogs & derivatives* / Q000097:blood; D011345:Fenofibrate / Q000031:analogs & derivatives* / Q000097:blood; D058607:Fibric Acids; D006801:Humans; D000960:Hypolipidemic Agents / Q000097:blood*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D058607:Fibric Acids; D000960:Hypolipidemic Agents; D002995:Clofibric Acid; C006012:fenofibric acid; C019304:ciprofibrate; D011345:Fenofibrate; D001629:Bezafibrate