title: Pharmacokinetics of azosemide in patients with T-drain after cholecystectomy.
abstract: In an open clinical trial the pharmacokinetics of orally administered azosemide (2-Chloro-5-(1H-tetrazol-5-yl)-4-[(2- thienylmethyl)amino] benzene sulfonamide. Luret, CAS 27589-33-9) was surveyed in a group of 10 patients with T-drain after cholecystectomy. The mean peak concentration was reached after 2.35 h (SE: 0.25 h) and was 474 ng/ml (142 ng/ml). The plasma elimination half-life was estimated to be 6.37 h (1.7 h). In 24 h 5.4% of the dose was excreted unchanged via urine and bile. Only a small fraction of the dose (0.53%) was recovered as glucuronide from urine and bile. Approximately 2% (0.74%) of the dose was excreted unchanged via bile. No other metabolites were detected. Plasma AUCO-24h was 3113 micrograms.h/l. The renal clearance of 27 ml/min (8.8 ml/min) was 3 times higher than the biliary clearance of 10 ml/min (2.4 ml/min). Azosemide is rapidly but incompletely absorbed and shows a longer half-life when compared with other loop diuretics. Enterohepatical circulation and first-pass effect seem to be less significant because low amount of azosemide is excreted via bile.
authors.affiliation: Pharmakologisches Institut für Naturwissenschaftler, Frankfurt/Main, Fed. Rep. of Germany.
authors.forename: H W
authors.initials: HW
authors.lastname: Schuchmann
authors.forename: W
authors.initials: W
authors.lastname: Rösch
authors.forename: U
authors.initials: U
authors.lastname: Koch
authors.forename: H H
authors.initials: HH
authors.lastname: Maurer
authors.forename: U
authors.initials: U
authors.lastname: Stengl
authors.forename: E
authors.initials: E
authors.lastname: Mutschler
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001646:Bile / Q000378:metabolism; D001682:Biological Availability; D002763:Cholecystectomy; D004232:Diuretics / Q000493:pharmacokinetics*; D005260:Female; D005965:Glucuronates / Q000378:metabolism / Q000652:urine; D006207:Half-Life; D006801:Humans; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D013424:Sulfanilamides / Q000493:pharmacokinetics*; D013777:Tetrazoles; D013876:Thiophenes; D000096926:Benzenesulfonamides
chemical_list: D004232:Diuretics; D005965:Glucuronates; D013424:Sulfanilamides; C018222:azosemide; D013777:Tetrazoles; D013876:Thiophenes; D000096926:Benzenesulfonamides