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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 5 (1972), S. 65-71 
    ISSN: 1432-1041
    Keywords: Digitalis ; metabolism ; excretion ; enterohepatic recirculation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The metabolism of tritiated peruvoside was investigated in 4 subjects, one of whom had a biliary fistula. The serum half life of radioactivity and urinary, fecal and biliary excretion were measured. Similar amounts of radioactivity were excreted in urine after oral and intravenous administration. The total excretion in 48 h was similar in all subjects (32.9% to 37.1% of dose administered). No unchanged drug was detected in the urine by GLC/MS/MID. Two metabolites, A and B, appeared in the excreta, B being cardio-inactive. Although large amounts of radioactivity were excreted in bile, no evidence was found of enterohepatic recirculation of the drug
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 9 (1976), S. 345-354 
    ISSN: 1432-1041
    Keywords: 3H-digitoxin ; metabolism ; spironolactone ; enzyme induction ; man
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The effect of spironolactone on the metabolism of intravenously administered3H-digitoxin (80 µCi) was investigated in eight patients. In three of them the labelled glycoside was given on a second occasion after spironolactone treatment had been discontinued for at least 65 days. Of total urinary radioactivity 79 % was unaltered drug and 12 % consisted of water soluble compounds. No digitoxigenin or digoxigenin and only trace amounts (〈2 %) of digoxin and the bis- and monoglycosides of digoxigenin were found. After spironolactone total urinary radioactivity was unchanged but the fraction eliminated as unchanged digitoxin fell from 79 to 66 % and the water soluble compounds increased from 12 to 26 % (p〈0.05). In addition spironolactone caused a 20 % reduction in the half-life of serum radioactivity (p〈0.01) and a 16 % reduction in the volume of distribution (p〈0.05). Induction of hepatic enzymes by spironolactone is proposed to explain the alteration in the metabolism of digitoxin in man. Both the altered metabolic pattern and the reduction in the volume of distribution appear to contribute to the reduction in half-life.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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