Dược Động Học :
▧ Absorption :
Following oral administration, stavudine is rapidly absorbed (bioavailability is 68-104%).
▧ Volume of Distribution :
* 46 ± 21 L
▧ Protein binding :
Negligible
▧ Metabolism :
Phosphorylated intracellularly to stavudine triphosphate, the active substrate for HIV-reverse transcriptase.
▧ Half Life :
0.8-1.5 hours (in adults)
▧ Clearance :
* Renal cl=272 mL/min [Healthy subjects receiving 80 mg PO]
* 594 +/- 164 mL/min [HIV-infected adult and pediatric patients following 1-hour IV infusion]
* 9.75 +/- 3.76 mL/min/kg [HIV- Exposed or -Infected Pediatric Patients(Age 5 weeks – 15 years) following 1-hour IV infusion]