<prompt> AZT, DD1, HAART are combination of three drugs are used in AIDS acts byInhibitory effects on viral DNANucleoside reverse transcriptase inhibitorsInhibit the synthesis of group 24P53 anti- apoptotic molecule synthesis  <response>: Nucleoside reverse transcriptase inhibitors 770-KDT 6th Nucleoside reverse transcriptase inhibitors NRTIs -Zidovudine AZT, Didanosine ddl Stavudine d4T Lamivudine 3TC abacavirABCSingle- stranded viral RNAVirus directed reverse transcriptaseInhibited by zidovudine triphosphateDouble - stranded viral DNA Non nucleoside reverse transcriptase inhibitors NNRTIsNevirapine NVP Efavirenz EFV Delavirdine Protease inhibitors - Ritonavir, Indinavir, Nelfinavir, Saquinavir Fusion inhibitor - Enfuvirtide binding to HIV envelope glycoprotein grp 41 and preventing fusion of viral and cellular membranes 