Dược Động Học :
▧ Absorption :
Peak plasma concentrations are achieved in 3-4 hours when azosemide is administered to healthy humans in a fasting state.
There is an absorption lag time of approximately 1 hour. [1]
Oral bioavailability estimated to be 20.4% [1]
▧ Volume of Distribution :
Poor affinity for human tissue. Small apparent post-pseudodistribution Vd of 0.262 l/kg. [1]
▧ Protein binding :
> 95% 4% protein binding to 4% human serum albumin at azosemide concentrations of 10-100ug/ml, using equilibrium dialysis. [1]
▧ Metabolism :
Considerable first pass metabolism which makes parentral administration more effective than oral administration.
Eleven metabolites of azosemide were found in rats, but only azosemide and its glucuronide were detected in humans. [1]
▧ Route of Elimination :
Total body clearance 112ml/min.
Renal clearance 41.6ml/min. Actively secreted in the renal proximal tubule of humans. This may or may not involve a nonspecific organic acid secretory pathway. [1]
There is thus a potential for disease states and other organic acids such as NSAIDs which affect the organic acid transport pathway to affect the efficacy of azosemide.
▧ Half Life :
Terminal half life 2-3 hours. [1]