Dược Động Học :
▧ Absorption :
After oral administration, ezetimibe is absorbed and extensively conjugated to a pharmacologically active phenolic glucuronide (ezetimibe-glucuronide). When a single 10 mg dose of ezetimibe is given to a fasted, male, adult subject, the pharmacokinetic parameters are as follows: Cmax = 3.5 - 5.5 ng/mL; Tmax = 4- 12 hours. The pharmacokinetic parameters for ezetimibe-glucuronide are as follows: Cmax = 45 - 71 ng/mL; Tmax = 1-2 hours. Food has not impact on the extent of absorption of ezetimibe. However, Cmax increases by 38% with a high-fat meal.
▧ Protein binding :
>90% bound to human plasma protein
▧ Metabolism :
Ezetimibe is primarily metabolized in the small intestine and liver via glucuronide conjugation (a phase II reaction) with subsequent biliary and renal excretion. In humans, ezetimibe is rapidly metabolized to ezetimibe-glucuronide.
▧ Route of Elimination :
78% of the dose is excreted into feces. 11% of the dose is excreted into urine. Ezetimibe was the major component in feces and accounted for 69% of the administered dose, while ezetimibe-glucuronide was the major component in urine and accounted for 9% of the administered dose.
▧ Half Life :
22 hours (both ezetimibe and ezetimibe-glucuronide).