sargramostim

Sargramostim is a recombinant granulocyte macrophage colony-stimulating factor which functions as a immunostimulator.
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Sargramostim /sar·gram·os·tim/ granulocyte-macrophage colony-stimulating factor developed by recombinant technology; used to enhance neutrophil [more]Sargramostim - Community and Resources

A substance that helps make more white blood cells, especially granulocytes, macrophages, and cells that become platelets. It is a cytokine that belongs to the family of drugs called hematopoietic (blood-forming) agents. Also called granulocyte-macrophage colony-stimulating factor (GM-CSF).