Nevirapine

A potent and specific non-nucleoside inhibitor (NNRTI) of HIV-1 reverse transcriptase with Ki of 0.2 uM; shows no effect on feline and simian RT or any mammalian DNA polymerases; inhibits HIV-1 replication and protein p24 production.HIV Infection Approved(In Vitro):Nevirapine itself is an inhibitor of only CYP3A4 at concentrations that are well above those of therapeutic relevance (Ki=270 μM). Nevirapine has been used as a re-differentiation agent to treat cancers in several human cancer models. At all doses (100, 200, 350, 500 μM) tested, nevirapine significantly inhibits cell proliferation after 48 h treatment. At high dose (500 μM), nevirapine significantly increases the percentage of apoptotic cells compared with control. Nevirapine is a potent and selective inhibitor (IC50=10-100 nM) of the replication of a wide variety of HIV-1 strains in several cellular assays.\n(In Vivo):Nevirapine is available for use in combination with nucleoside HIV-1 reverse transcriptase inhibitors (e.g., zidovudine, didanosine, etc.). Nevirapine has received FDA approval for use in combination with HIV-1 protease inhibitors (e.g., saquinavir, ritonavir, indinavir, etc.). In humans, nevirapine is eliminated primarily in the urine as glucuronide conjugates of 2-, 3-, 8-, and 12-hydroxynevirapine. Nevirapine is completely absorbed in both sexes of mouse, rat, rabbit, monkey, and chimpanzee. Nevirapine is extensively metabolized in both sexes of all animal species studied. Nevirapine (9 mg/kg, 18 mg/kg and 36 mg/kg) shows significant reduction in ulcer severity score and ulcer index as compared to the control.