LEUKOPLUS® contains filgrastim (a white blood cell growth factor analogue) produced by using the recombinant DNA technology. This factor stimulates the bone marrow to produce more white blood cells. A sudden decrease in the number of white blood cells, i.e. neutropenia, weakens the body in its fight with infections. LEUKOPLUS® treats neutropenia by stimulating the bone marrow to rapidly produce new blood cells. Furthermore, LEUKOPLUS® is also prescribed to increase new white blood cell production in support of therapies for immunosuppressive disorders such as AIDS and cancer therapies affecting the immune system.