Pharmacokinetics of tamoxifen after intravenous and oral dosing of tamoxifen-hydroxybutenyl-beta-cyclodextrin formulations.
J Pharm Sci
; 96(3): 644-60, 2007 Mar.
Article
em En
| MEDLINE
| ID: mdl-17083091
ABSTRACT
Oral and intravenous administration of tamoxifen base and tamoxifen citrate formulated with hydroxybutenyl-beta-cyclodextrin (HBenBCD) to Sprague-Dawley rats significantly increased the oral bioavailability of tamoxifen relative to that of parent drug (no HBenBCD). When formulated with HBenBCD, the form of tamoxifen (base vs. salt) made no difference in the oral bioavailability of tamoxifen. Liquid formulations (PGPEG400H2O) provided higher oral bioavailability than solid formulations dissolved and dosed as aqueous oral solutions. The oral bioavailability of tamoxifen was significantly influenced by both dietary status and time of dosing of the animals. Tamoxifen metabolite plasma concentrations were not affected by complexation of tamoxifen with HBenBCD. Collectively, the data indicated that dosing of fasted animals in the morning with tamoxifenHBenBCD formulations provided a very significant increase in tamoxifen oral bioavailability (up to 10- to 14-fold).
Buscar no Google
Base de dados:
MEDLINE
Assunto principal:
Tamoxifeno
/
Beta-Ciclodextrinas
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
J Pharm Sci
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Estados Unidos