title: Enterohepatic recirculation of the new antihypertensive drug UP 269-6 in humans. A possible model to account for multiple plasma peaks.
abstract: Following a single dose of a new antihypertensive drug, UP 269-6 (5-methyl-7-propyl-8-[(2'-(1H-tetrazol-5-yl) biphenyl-4-yl)methyl]-1,2,4-triazolo[1,5-c]pyrimidin-2(3H)-one, CAS 148504-51-2), to 12 healthy volunteers, the plasma levels showed at least two secondary peaks. To explain this observation, the data were fitted to a new compartmental model of enterohepatic recirculation, without using a numerical method. Most subjects exhibited two cycles of recirculation. The amount of drug involved in each recirculation was calculated and the AUCs compared. The drug showed high biliary excretion and reabsorption.
authors.affiliation: Laboratoire de Pharmacocinétique et Toxicologie Clinique, Centre Hospitalier Universitaire (CHU) de Rangueil, Toulouse (France).
authors.forename: Y
authors.initials: Y
authors.lastname: Plusquellec
authors.forename: R
authors.initials: R
authors.lastname: Arnaud
authors.forename: S
authors.initials: S
authors.lastname: Saivin
authors.forename: T A
authors.initials: TA
authors.lastname: Shepard
authors.forename: I
authors.initials: I
authors.lastname: Carrie
authors.forename: P
authors.initials: P
authors.lastname: Hermann
authors.forename: J
authors.initials: J
authors.lastname: Souhait
authors.forename: G
authors.initials: G
authors.lastname: Houin
mesh_terms: D000328:Adult; D000465:Algorithms; D000959:Antihypertensive Agents / Q000097:blood / Q000493:pharmacokinetics*; D019540:Area Under Curve; D001646:Bile / Q000378:metabolism; D004764:Enterohepatic Circulation; D006801:Humans; D008297:Male; D008954:Models, Biological; D011743:Pyrimidines / Q000097:blood / Q000493:pharmacokinetics*; D013777:Tetrazoles / Q000097:blood / Q000493:pharmacokinetics*
chemical_list: D000959:Antihypertensive Agents; D011743:Pyrimidines; D013777:Tetrazoles; C088791:UP 269-6