Generic Crixivan (Indinavir) is one of the protease inhibitors that is used for the treatment of HIV. It is to be used along with other anti-HIV drugs in order to increase the CD4 or T helper cells in the body. These are the white blood cells responsible to fight any infection threatening the body. The increase in these cells will enable the body to fight infections and not fall prey to any infection very easily. You can buy Generic Crixivan (Indinavir) to fight HIV but do not hope to cure HIV totally with this medicine.