0.5 log with initiation of treatment or increase of viral load by > 0.5 log while on treatmentLow pill burden regimens Combivir +Neviripine Trizivir | Change to alternative first line regimens High potency regimens| | Perform resistance testing and change to a regimen with three drugs to which the patient is not resistant. If possible Combivir +Lopinavir withRitonavir Approach to antiretroviral therapy">