title: A bioequivalence study of two oral desmopressin tablet formulations.
abstract: The present study was carried out to test bioequivalence between two different oral desmopressin formulations. Sixty healthy volunteers were enrolled in the study and were randomly assigned to receive the test (T) and reference (R) drug in a two-period two-sequence, crossover, analyst-blinded study design. Subjects received an oral dose of 400 mug of desmopressin acetate separated by a wash-out period of at least 7 days. The area under the concentration-time curve (AUC) over 12 h in plasma and the maximum concentration (C(max)) were compared by analysis of variance (ANOVA) after log transformation. The mean ratios of the T to R drug were within the bioequivalence boundaries with mean values of 1.00 (90% CI: 0.87-1.14) and 1.03 (90% CI: 0.92-1.15) for AUC(0-t) and AUC(0-inf), respectively. For the C(max), the mean ratio of the T to R drug was 0.97 (90% CI: 0.87-1.08). The rate and the extent of oral desmopressin absorption were identical for both formulations. Hence, the desmopressin test tablet met all bioequivalence criteria of the marketed reference desmopressin tablet.
authors.affiliation: Department of Clinical Pharmacology, Division of Clinical Pharmacokinetics, Medical University of Vienna, Vienna, Austria.
authors.forename: Stefan T
authors.initials: ST
authors.lastname: Kaehler
authors.forename: Ilka M
authors.initials: IM
authors.lastname: Steiner
authors.forename: Robert
authors.initials: R
authors.lastname: Sauermann
authors.forename: Helmut
authors.initials: H
authors.lastname: Scheidl
authors.forename: Markus
authors.initials: M
authors.lastname: Mueller
authors.forename: Christian
authors.initials: C
authors.lastname: Joukhadar
mesh_terms: D000284:Administration, Oral; D000293:Adolescent; D000328:Adult; D050034:Antidiuretic Agents / Q000008:administration & dosage / Q000737:chemistry / Q000493:pharmacokinetics*; D002626:Chemistry, Pharmaceutical; D018592:Cross-Over Studies; D003894:Deamino Arginine Vasopressin / Q000008:administration & dosage / Q000737:chemistry / Q000493:pharmacokinetics*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017410:Practice Guidelines as Topic; D013607:Tablets; D013810:Therapeutic Equivalency
chemical_list: D050034:Antidiuretic Agents; D013607:Tablets; D003894:Deamino Arginine Vasopressin