Table 2: Cutoffs of selected antiretroviral trough levels Drug Lower limit of range (levels below this at screening are exclusionary) Efavirenz(94) 1 µg/mL Nevirapine(94) 3 µg/mL Etravirine(95) 75 ng/mL Rilpivirine(96) 4 ng/mL Atazanavir/r(94) 0.15 µg/mL Darunavir/r(96) 1036 ng/mL Lopinavir/r(94)