Despite their longstanding use in the context of highly active anti-retroviral therapy (HAART) for the treatment of HIV infections, non-nucleoside reverse-transcriptase inhibitors (NNRTIs) continue to be the focus of much pharmaceutical research. 1 Three NNRTIs are currently approved for clinical use: Efavirenz, Nevirapine, and Delavirdine (Fig. 1). Other compounds, such as TMC-125 and TMC-278, have entered late stage clinical trials. 2 Mode of action studies ...