title: [Enhanced bioavailability of digoxin by gamma-cyclodextrin complexation: evaluation for sublingual and oral administrations in humans].
abstract: The inclusion complex of digoxin with gamma-cyclodextrin was prepared in a molar ratio of 1:4, and evaluated for sublingual and oral administrations in humans. In the dissolution tests of digoxin tablets, the increase in dissolution rate and decrease in acid hydrolysis were attained by gamma-cyclodextrin complexation. The serum levels of digoxin after sublingual and oral administrations to human healthy volunteers in the form of complex tablets were higher than the digoxin alone, particularly in the case of the sublingual form of gamma-cyclodextrin complex. The present data suggested that the sublingual administration of the rapid dissolving form of gamma-cyclodextrin complex may be useful for improving the bioavailability of digoxin due to the prevention of acid hydrolysis in stomach and the enhancement of drug absorption rate.
authors.forename: H
authors.initials: H
authors.lastname: Seo
authors.forename: K
authors.initials: K
authors.lastname: Uekama
mesh_terms: D000284:Administration, Oral; D000328:Adult; D001682:Biological Availability; D003505:Cyclodextrins; D004077:Digoxin / Q000008:administration & dosage / Q000493:pharmacokinetics*; D004337:Drug Carriers; D006801:Humans; D008297:Male; D012995:Solubility; D013607:Tablets
chemical_list: D003505:Cyclodextrins; D004337:Drug Carriers; D013607:Tablets; D004077:Digoxin