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. 2012 Feb 5;39(2):195–203. doi: 10.1007/s10928-012-9241-9

Table 1.

Overview of the pharmacokinetic properties of all the hypothetical drugs, paracetamol and morphine

Drug Metabolic routea Lipophilicity (log P)a CL blood flow (%)a Max. CL liver diffusion (%)a Free fractiona Intrinsic clearance (L/min)b Molecular weight (g/moL)b Extraction ratioc N
Paracetamol UGT1A6 (58%) 0.46 21 0 0.82 0.455 151.2 0.27
Sulfation (29%)
CYP2E1 (10%)
Renal (3%)
Hypotheticals UGT1A6 (65%) 0.46 10, 50, 90 10, 50, 90 0.05, 0.50, 0.95 0.17–164 96–865 0.0056–0.91 17
Sulfation (35%)
1 10, 50, 90 10, 50, 90 0.05, 0.50, 0.95 0.17–164 185–600 0.017–0.89 14
2 50, 90 10 0.05, 0.50, 0.95 2.40–171 370–667 0.074–0.72 6
Morphine UGT2B7 (90.5%) 0.89 96 78 0.75 89.4 285.3 0.51
CYP3A4 (5%)
Renal (4.5%)
Hypotheticals UGT2B7 0.89 10, 50, 90 10, 50, 90 0.05, 0.50, 0.95 0.17–164 144–446 0.055–0.90 15

aPre-defined pharmacokinetic properties

bParameters adapted in the model

cResultant pharmacokinetic property