title: Second protease inhibitor approved for HIV therapy.
mesh_terms: D017277:Drug Approval; D015658:HIV Infections / Q000188:drug therapy*; D017320:HIV Protease Inhibitors / Q000627:therapeutic use*; D019438:Ritonavir; D013844:Thiazoles / Q000627:therapeutic use*; D014633:Valine / Q000031:analogs & derivatives* / Q000627:therapeutic use
chemical_list: D017320:HIV Protease Inhibitors; D013844:Thiazoles; D014633:Valine; D019438:Ritonavir