NAC for Promoting Hematopoietic Recovery in Patients With Acute Myeloid Leukemia After Chemotherapy

N-acetyl-L-cysteine (Yiweishi) capsules (Guangdong Renrenkang Pharmaceutical Industry) will be given orally 400mg three times a day from day 1 to day 28 after chemotherapy. In case of drug allergy such as nausea, vomiting, rash and bronchospasm, and disease relapse, to discontinue the drug immediately.