- Group 2 switch to LPV/r antiretroviral monotherapy in the dose of 400/100 mg 12/12 hs with food. Patients in group 2 who were being treated previously with non-nucleoside reverse transcriptase inhibitors (Efavirenz or Nevirapine) were instructed to take 4 capsules of Lopinavir/r each 12 hs, during the first 14 days of therapy (up to Week 2 visit).