Amiodarone-cyclosporine interaction in a heart transplant patient.
J Heart Lung Transplant
; 11(3 Pt 1): 564-8, 1992.
Article
em En
| MEDLINE
| ID: mdl-1610865
ABSTRACT
We report the case of a heart transplant patient whose cyclosporine clearance decreased by more than 50% after the institution of amiodarone therapy. This interaction necessitated a significant dosage reduction to maintain cyclosporine concentrations within the therapeutic range. To investigate the mechanism of the interaction, a cyclosporine-lipoprotein-binding determination was performed. The results suggest that drug displacement from competitive lipoprotein-binding sites is not responsible for the alterations in cyclosporine pharmacokinetics. Clearance data suggests, however, that the primary mechanism for the interaction is the inhibition cyclosporine metabolism by the cytochrome P-450 system. This report emphasizes the importance of reevaluating therapeutic drug regimens when new agents are added to prevent complications caused by drug interactions. If amiodarone and cyclosporine must be used concomitantly, cyclosporine levels must be monitored frequently, in anticipation of this interaction.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Transplante de Coração
/
Ciclosporina
/
Amiodarona
Limite:
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
J Heart Lung Transplant
Assunto da revista:
CARDIOLOGIA
/
TRANSPLANTE
Ano de publicação:
1992
Tipo de documento:
Article