|  |  |  |  |  | 
         
          | Nucleoside 
            / Nucleotide  Reverse Transcriptase Inhibitors (NRTIs) | 
         
          |  |  |  |  |  | 
         
          |  |  |  |  |  | 
         
          |  |  |  |  |  | 
         
          | 
               
                | Trizivir (abacavir/lamivudine/ 
                    zidovudine)  |   
                |  |  |   
                |  |  |  |  |  |  |  | 
         
          |  |  |  |  |  | 
         
          |  | 
         
          |   |  | 
         
          | non 
            Nucleoside Reverse Transcriptase Inhibitors (NNRTIs) | 
         
          |  |  |  |  |  | 
         
          |  |  |  |  | 
         
          |   | 
         
          | Protease 
            Inhibitors (PIs) | 
         
          |  |  |  |  |  | 
         
          |  |  |  |  |  | 
         
          |  |  |  |  |  | 
         
          |  |  |  |  |  | 
         
          |   | 
         
          | Fixed-dose 
            Combinations | 
         
          |  |  |  |  |  | 
         
          | 
               
                | Atripla (efavirenz/emtricitabine/
 tenofovir)
 |   
                |  |  |   
                |  |  |  |  |  | 
               
                | Trizivir (abacavir/lamivudine/ 
                    zidovudine)  |   
                |  |  |   
                |  |  |  |  | 
         
          |   |  |  | 
         
          | Fusion 
            Inhibitor (FIs) |  | CCR5 
            Antagonist |  | Integrase 
            Inhibitor | 
         
          |  |  | 
 |  |  | 
         
          |  |   |  |  |  | 
         
          |  | 
         
          |   |  | 
         
          |  |