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Digitoxin and its metabolites in patients with liver cirrhosis

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Summary

Pharmacokinetic profile and urinary excretion of digitoxin and 4 metabolites were investigated in 9 patients with biopsy confirmed liver cirrhosis (median antipyrine clearance 20.0±5.4 ml/min; X±SEM) and were compared with that of 8 healthy volunteers (antipyrine clearance 36.9±4.9 ml/min) following intravenous and p.o. administration of 1 mg digitoxin. The kinetic parameters derived from the digitoxin plasma concentration time curve and from urinary recovery including total clearance of unchanged digitoxin did not differ significantly between both groups investigated. Renal clearance of digitoxin was 0.017±0.005 ml/min/kg in the patient group and 0.011±0.002 ml/min/kg in the volunteers (NS); it was 0.00340±0.00047 ml/min/kg and 0.00223±0.00039 ml/min/kg, respectively for digitoxigenin-bis-digitoxoside (NS), 0.00006±0.00001 ml/min/kg and 0.00016±0.00005 ml/min/kg for digitoxigenin-mono-digitoxoside (P<0.05), 0.00041±0.00013 ml/min/kg and 0.00088±0.00032 ml/min/kg for digitoxigenin (P<0.05), 0.00135±0.00049 ml/min/kg and 0.00113±0.00042 ml/min/kg for digoxin (NS). In conclusion, hydrolysis of digitoxin is altered in liver cirrhosis, whereby a significant reduction in the renal clearance and urinary recovery of digitoxigenin-mono-digitoxoside and digitoxigenin was seen in the present study.

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This publication represents part of the doctoral thesis of Mrs A. Schacht, Department of Internal Medicine, Christian-Albrechts-Universität, Kiel, Germany.

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Nokhodian, A., Santos, S.R.C.J. & Kirch, W. Digitoxin and its metabolites in patients with liver cirrhosis. Eur. J. Drug Metab. Pharmacokinet. 18, 207–213 (1993). https://doi.org/10.1007/BF03188797

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