Factors affecting the plasma conc-time profile (Cont'd)

b- Vmax

Examine the conc-time profiles after administration of the same dose when Vmax is different.

Parameters
Dose (mg) Vmax (mg/hr) Km(mg/L)
500 30 5
Vmax (mg/hr)

Larger Vmax results in higher total body clearance, and shorter half life which leads to faster rate of drug elimination and smaller AUC.

Parameters
Dose (mg) Vmax (mg/hr) Km(mg/L)
300 40 10
Vmax (mg/hr)

Larger Vmax results in higher total body clearance and faster rate of drug elimination. After multiple administration of similar doses, the steady state conc will be lower when Vmax is higher.

  • Page 3 of 4
  • 1
  • 2
  • 3
  • 4