Somatropin (human growth hormone (hGH)) is a peptide hormone that is synthesized and secreted by the somatotropic cells of the anterior pituitary gland. Somatropin injection is used to replace growth hormone (a natural hormone produced by your body) in adults and children with growth hormone deficiency.

Filgrastim (Granulocyte colony-stimulating factor (G-CSF or GSCF)), also known as colony-stimulating factor 3 (CSF 3), is a glycoprotein that stimulates the bone marrow to produce granulocytes and stem cells and release them into the bloodstream.