G-CSF (Granulocyte-Colony Stimulating Factor): This is the most commonly used agent. It is administered via injection for several days before stem cell collection. Plerixafor: Often used in combination with G-CSF, plerixafor is particularly useful for patients who do not respond adequately to G-CSF alone. Chemotherapy: Sometimes, chemotherapy drugs are used to help mobilize stem cells. This approach can be beneficial for patients who need additional treatment for their cancer.