Sensitivity analysis of cellular unbound fraction of inhibitor (fu,cell,inhibitor) for telmisartan and bosentan. Fold changes in the TCA Ct,Cells at steady state compared with baseline (without inhibitors), in the presence of telmisartan and bosentan, were simulated based on the average IC50 values (Table 1), cellular total inhibitor concentration (Table 3), and different fu,cell,inhibitor values using a Monte Carlo simulation approach. Data were expressed as mean and S.D. of 40 simulated individuals.