NVP-QAV-680 is a potent and selective antagonist of CRTh2 receptor. NVP-QAV-680 has nM functional potency for inhibition of CRTh2 driven human eosinophil and Th2 lymphocyte activation in vitro.

Nevirapine (NVP) is a benzodiazepine non-nucleoside reverse transcriptase inhibitor. In combination with other antiretroviral drugs, nevirapine reduces HIV viral loads and increases CD4 counts, thereby retarding or preventing the damage to the immune system and reducing the risk of developing AIDS.