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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Digitoxin kinetics and renal excretion in children.

Digitoxin kinetics were investigated in 11 children, three girls and eight boys, with a mean age of 7.1 yr (5.9 to 9.2). Five children received digitoxin, 17.5 to 20 micrograms/kg IV, and six other children received 20 micrograms/kg as an oral solution. Digitoxin was given as a single dose 24 to 48 hr after cardiac surgery, and patients were monitored in an intensive care unit for 24 hr. Serum and urine digitoxin concentrations were determined by radioimmunoassay. Children had larger apparent volumes of distribution (1 l/kg) than adults (0.57 l/kg). Mean serum elimination t 1/2 was 6.4 days in children (3 to 11.2) and 8.2 days in adults (5.9 to 11.3). Total body clearance was much greater in children (0.085 ml X min-1 X kg-1) than in adults (0.036 ml X min-1 X kg-1). This was because of an increase in metabolic clearance, although there was no difference in renal clearance in children and adults. Absolute oral bioavailability, measured by comparing serum AUCs after intravenous and oral doses, was complete. Peak serum concentrations of 23 to 50 ng/ml developed 90 to 120 min after the oral dose. A single digitalization dose of 20 micrograms/kg was well tolerated and did not induce arrhythmias.[1]


  1. Digitoxin kinetics and renal excretion in children. Larsen, A., Storstein, L. Clin. Pharmacol. Ther. (1983) [Pubmed]
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