tdm
 &an R package for therapeutic drug monitoring
Simulation :
We validated this tools using simulated date obtained from the mean PK parameters within the range of 2*sd. And the accuracy of PK parameters was validated with percent prediction error (PE%) . And there are two ways to produce simulated data. In first validation if drug A monitored Cl and Vd, we simulated them obtained from Cl-2*sd plus Vd-2*sd to Cl+2*sd plus Vd+2*sd ; In another validation we simulated PK parameters obtained with mean Cl plus mean Vd within the range of 2*sd or with mean Vd plus mean Cl within the range of 2*sd.
Validation Result :
   Validation I

Table 1
Validation I of Clearance as Percent of Prediction Error


















Table 2
Validation I of Volume of Distribution (%PE)
Validation I of Absorption Rate Constant (%PE) Table 3
Validation I of Absorption Rate Constant (%PE)




 * Vmax: maximum rate of metabolism
 * Km: plasma concentration at which metabolism is occurring at half the maximum rate

Table 4
Validation I of PK Parameters of Phenytoin (%PE)



 * Cmax: concentration related with maximum suppression of clotting factors
 * cl: clearance
 * K: first order rate constant for clotting factor degradation
 * m: prothrombin complex activity remaining
 * Vd: volume of distribution
Table 5
Validation I of PK Parameters of Warfarin (%PE)
  Validation II