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  • Title: A model for the prediction of digoxin-drug interactions at the renal tubular cell level.
    Author: Woodland C, Ito S, Koren G.
    Journal: Ther Drug Monit; 1998 Apr; 20(2):134-8. PubMed ID: 9558126.
    Abstract:
    Digoxin-drug interactions are relatively common causes of digitalis toxicity. Recently, the clinical importance of the renal tubular secretion of digoxin has been proven by documenting drug interactions at this level. The authors describe a model using cultured renal tubular cell monolayers that can be used to predict drug interactions with the cardiac glycoside. This model accurately documents known clinical digoxin interactions such as those with verapamil and propafenone. The common feature of these interactions is that they involve P-glycoprotein substrates (e.g., digoxin, vincristine, vinblastine) or inhibitors (e.g., quinidine, cyclosporine). In the case of the newly described interaction of digoxin with itraconazole, the model preceded the emergence of clinical cases.
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