Some patients may not feel uncomfortable after chemotherapy. This is related to the patient’s constitution, just like some patients are allergic to penicillin and some are not. Some chemotherapy drugs such as epirubicin hydrochloride and cisplatin cause nausea, vomiting and other discomfort in most patients. Some chemotherapy drugs, such as pemetrexed and gemcitabine, usually do not cause discomfort after use. Nowadays, the use of chemotherapy drugs requires the use of antiemetic drugs in advance, especially the anti-emetic drugs of the Sikyong class, which will greatly reduce the patient’s gastrointestinal reactions compared with the absence of this drug.