TABLE 3

Pharmacokinetic parameters for 11 UGT substrates

DrugCLtotRbCLrFFaFgReference
17.120.725.5
ml · min1 · kg1ml · min1 · kg1Qh (ml · min1 · kg1)
Quercetin111.000.001a0.0040.0030.002Cubitt et al., 2009
Raloxifene14.7b1.000.020.1430.0690.047Thummel et al., 2005
Bazedoxifene6.7c0.5500.060.1450.1170.101Patat et al., 2003; Chandrasekaran et al., 2009
Chandrasekaran et al., 2003
Diclofenac3.50.6300.540.8000.7380.690Willis et al., 1979
Obach et al., 2008
Tolfenamic acid2.20.6600.600.7450.7150.690Pentikäinen et al., 1981
Tolcapone1.90.6100.600.7340.7060.683Jorga et al., 1998
Obach et al., 2008
Entacapone120.5900.251.00e1.00f1.00fHeikkinen et al., 2001
Obach et al., 2008
Telmisartan8.40.6700.431.00e, f1.00f0.846fObach et al., 2008
Stangier et al., 2000
Gemfibrozil1.70.5800.981.00f1.00f1.00fThummel et al., 2005
Etodolac0.66d0.5500.800.8590.8480.839
Indomethacin1.40.55g0.211.01.00f1.00f1.00fThummel et al., 2005
  • a Calculated from CLtot (11 ml · min−1 · kg−1) and oral clearance (8333 ml · min−1 · kg−1) (Cubitt et al., 2009).

  • b Calculated from oral clearance data (735 ml · min−1 · kg−1) and reported bioavailability of 2% (Thummel et al., 2005).

  • c Calculated from oral clearance data (86.7 ml · min−1 · kg−1) and reported bioavailability of 6.2% (Patat et al., 2003; Chandrasekaran et al., 2009).

  • d Calculated from oral clearance data (0.82 ml · min−1 · kg−1) and reported bioavailability of 80%. Etodolac (Lodine) U.S. Food and Drug Administration drug approval package (http://www.accessdata.fda.gov/drugsatfda_docs/label/2006/018922s022,020584s009lbl.pdf).

  • e Calculated FaFg was < 0, because CLtot/Rb/Qh was > 1. Therefore, CLtot/Rb was assumed to 90% of Qh.

  • f When calculated FaFg was > 1, it was treated as 1.0.

  • g Assumed to be 0.55 because indomethacin and etodolac are acidic drugs (Cubitt et al., 2011).