Hypo-leukocytes is a condition often seen in clinical practice, and drug therapy is one of them. There are several drugs to raise white blood cells: firstly, Lixisen, which can promote the proliferation of white blood cells, 10-20mg once, 3 times a day. Second, vitamin B4, which can stimulate and promote the proliferation of white blood cells. Usually the number of white blood cells can be increased with 2-4 weeks of medication. It is used for leukopenia and acute granulocytopenia caused by radiation or drug treatment, 10-20mg once, 3 times a day. Third, shark liver alcohol, can make leukocyte proliferation, against radiation. 20mg once, 3 times a day for 4-6 weeks. Fourthly, leucovorin, which has the effect of raising leukocytes and preventing leukopenia, promoting bone marrow cell proliferation, its effect is stronger and less fluctuating than vitamin B4 or shark liver alcohol, when other drugs are ineffective, this product is still effective. It can be taken orally once at 200mg or 50mg 3 times a day. Fifthly, Boosted White, which can promote the hematopoietic function of bone marrow, increase the number of terminal white blood cells and platelets, and is suitable for the prevention and treatment of leukopenia caused by radiotherapy drugs, 50mg once for adults, 3 times a day. In addition, there is also granulocyte growth factor is now a drug often used in clinical practice, mainly for the treatment of acute leukopenia.