Dược Động Học :
▧ Absorption :
Bumetanide is completely absorbed (80%), and the absorption is not altered when taken with food. Bioavailability is almost complete.
▧ Protein binding :
97%
▧ Metabolism :
45% is secreted unchanged. Urinary and biliary metabolites are formed by oxidation of the N-butyl side chain.
▧ Route of Elimination :
Oral administration of carbon-14 labeled Bumex to human volunteers revealed that 81% of the administered radioactivity was excreted in the urine, 45% of it as unchanged drug. Biliary excretion of Bumex amounted to only 2% of the administered dose.
▧ Half Life :
60-90 minutes
▧ Clearance :
* 0.2 - 1.1 mL/min/kg [preterm and full-term neonates with respiratory disorders]
* 2.17 mL/min/kg [neonates receiving bumetanide for volume overload]
* 1.8 +/- 0.3 mL/min/kg [geriatric subjects]
* 2.9 +/- 0.2 mL/min/kg [younger subjects]