When given around the time of labor Viramune has demonstrated effectiveness in preventing the transmission of HIV from mother to child, but there was an increase in HIV drug resistance when given viramune alone. Viramune must be used in combination with other drugs to treat HIV. If you are not seeking such information or may be offended by such materials, please exit this website. Nevirapine is white to off-white crystalline powder with the molecular weight of 266. In these subjects the combination of AZT, ddI, and viramune, reduced the viral load significantly more than AZT, ddI, and placebo, throughout the 48 weeks of the trial. MISSED DOSE: If you miss dose, take it as soon as you remember unless it is within hours of your next dose.