title: [Cyclosporine level in blood as monitored by area-under-the-curve (AUC). III. The influence of absorption phase after orally dosing].
abstract: The influence of the absorption phase (the time of maximum blood concentration; Tmax) on the pharmacokinetics of cyclosporine (CYA) in the steady state after oral administration was studied in 26 renal transplant recipients. The patients were divided into three absorption phase groups with the Tmax times as follows, group A (n = 26); OH < or = Tmax < 3 h, group B (n = 6); 3 h < or = Tmax < 6 h and group C (n = 11); 6 h < or = Tmax < or = 12 h. CYA (dose; 1.6-15.0 mg/kg/d) was administered orally to all 26 patients (10-52 years, 33.1-74.2 kg) every 12 h. The blood specimens used in this study were collected just before administration (0 h) in the morning and at intervals of 1, 2, 3, 6, 8 and 12 h after administration. The whole blood CYA levels were measured by high-performance liquid chromatography (HPLC) or by fluorescence polarization immunoassay (FPIA) based on a specific monoclonal antibody. There were no significant differences between the three groups in terms of the dosage (mg/kg/d) and area-under-the-curve (AUC). The trough levels (0, 12 h) correlated well to the AUC only in group A (r = 0.842-0.907, p < 0.001). The morning trough levels (0 h) were significantly higher than the night trough levels (12 h) in groups A and B (p < 0.05-0.01).(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Department of Pharmacy, Sapporo City General Hospital, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Yuhki
authors.forename: K
authors.initials: K
authors.lastname: Tadano
authors.forename: Y
authors.initials: Y
authors.lastname: Takahashi
authors.forename: K
authors.initials: K
authors.lastname: Iseki
authors.forename: K
authors.initials: K
authors.lastname: Miyazaki
authors.forename: T
authors.initials: T
authors.lastname: Hirano
mesh_terms: D000284:Administration, Oral; D000293:Adolescent; D000328:Adult; D002648:Child; D002851:Chromatography, High Pressure Liquid; D016572:Cyclosporine / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics*; D005260:Female; D006801:Humans; D016030:Kidney Transplantation; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic
chemical_list: D016572:Cyclosporine