Recombinant human erythropoietin. Many people find few white blood cells when they check their blood. If the white blood cells are insufficient, we must first find the reason for the deficiency. Drugs that do not belong to leukocytosis include recombinant human erythropoietin and leukocytosis drugs: Li Kejun tablets belong to cysteine derivatives, which can promote the proliferation of platelets and leukocytes and enhance bone marrow hematopoiesis; Sanguisorba Bai Sheng tablets can also be used to increase white blood cells and treat leukopenia.