Abstract
Disposition of [ 14C] bumetanide administered intravenously to four healthy volunteers could be described by a triexponential equation. The mean half-lives associated with each exponent were 5.9 min, 46 min, and 3.1 hr, respectively. The largest fraction of dose was eliminated during the second phase; only 17% was eliminated during the last phase. The total plasma clearance averaged 228 ml/min, with renal clearance about one-half of this value. The recovery of unchanged bumetanide in urine over 2 days was 47% of the dose, while the total recovery of radioactivity in urine averaged 82% of dose. In plasma 93% of bumetanide was bound to proteins. Thus bumetanide is rapidly eliminated by both renal and nonrenal mechanisms. The elimination kinetics resembled those described for furosemide.
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Pentikäinen, P.J., Neuvonen, P.J., Kekki, M. et al. Pharmacokinetics of intravenously administered bumetanide in man. Journal of Pharmacokinetics and Biopharmaceutics 8, 219–228 (1980). https://doi.org/10.1007/BF01059643
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DOI: https://doi.org/10.1007/BF01059643