Dược Động Học :
▧ Absorption :
Carvedilol is rapidly and extensively absorbed following oral administration, with an absolute bioavailability of approximately 25% to 35% due to a significant degree of first-pass metabolism.
▧ Volume of Distribution :
* 115 L
▧ Protein binding :
98%
▧ Metabolism :
Hepatic. Carvedilol is metabolized primarily by aromatic ring oxidation and glucuronidation. The oxidative metabolites are further metabolized by conjugation via glucuronidation and sulfation. Demethylation and hydroxylation at the phenol ring produce three active metabolites with b-receptor blocking activity. The 4'-hydroxyphenyl metabolite is approximately 13 times more potent than carvedilol for b-blockade.
▧ Route of Elimination :
Carvedilol is extensively metabolized. Less than 2% of the dose was excreted unchanged in the urine.
Carvedilol is metabolized primarily by aromatic ring oxidation and glucuronidation. The oxidative metabolites are further metabolized by conjugation via glucuronidation and sulfation. The metabolites of carvedilol are excreted primarily via the bile into the feces.
▧ Half Life :
7-10 hours
▧ Clearance :
* 500-700 mL/min