title: Effect of ingesta and of tablets of different strengths on the systemic availability of digoxin in normal dogs.
abstract: The plasma concentrations of digoxin were measured in eight normal dogs given digoxin on four occasions, using three different feeding regimens and tablets of two strengths. Although ingesta tended to slow the absorption of digoxin, the systemic availability of the drug, based on measurements of Cmax, tmax and AUC did not differ when digoxin tablets were given with canned food, with dry food, or without food. However, some of the pharmacokinetic characteristics and smaller individual variations with the dry food regimen would be considered advantageous for maintenance therapy. Tablets containing 62.5 micrograms or 250 micrograms of digoxin had a similar relative bioavailability. The peak plasma digoxin concentrations were higher in female dogs, and the trends in other data also suggested that the systemic availability of digoxin was better in female dogs.
authors.affiliation: Department of Veterinary Clinical Sciences, University of Sydney, New South Wales, Australia.
authors.forename: A D
authors.initials: AD
authors.lastname: Watson
authors.forename: D B
authors.initials: DB
authors.lastname: Church
authors.forename: D R
authors.initials: DR
authors.lastname: Emslie
authors.forename: J D
authors.initials: JD
authors.lastname: Baggot
authors.forename: D L
authors.initials: DL
authors.lastname: Griffin
mesh_terms: D000818:Animals; D001682:Biological Availability; D004077:Digoxin / Q000097:blood / Q000493:pharmacokinetics*; D004285:Dogs / Q000378:metabolism*; D004305:Dose-Response Relationship, Drug; D004435:Eating; D005260:Female; D018565:Food-Drug Interactions; D008297:Male; D013607:Tablets
chemical_list: D013607:Tablets; D004077:Digoxin