Chemotherapy reactions usually disappear within about 1~2 weeks and can be relieved by medication, improved diet and lifestyle habits. Reactions usually start to appear within 3~5 days after chemotherapy, and the reactions will be larger, commonly occurring in the digestive tract, showing nausea, vomiting and so on. Symptoms usually disappear after a week. Some people may experience a drop in white blood cells about one week after chemotherapy, which usually disappears in about two weeks. After chemotherapy, it is recommended to take medications such as Flavoxate and Montelukast under doctor’s supervision to relieve nausea and vomiting. Symptoms of dropping white blood cells can also be relieved by consuming foods rich in high quality protein such as soy products. In addition, the diet should be light, pay attention to rest and appropriate physical exercise.