Exclusion criteria:
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1. Patients with major diseases, such as malignant tumor, acute or subacute hepatitis, severe aplastic anemia, idiopathic thrombocytopenic purpura, acute appendicitis, acute pancreatitis, torch syndrome;
2. Patients with chronic diseases, such as diabetes, coronary heart disease, and chronic hypertension;
3. Patients with other vomiting diseases, such as thyroid disease, gastroenteritis history, gastrointestinal disease, infectious disease, trophoblastic disease, psychological disorders, etc;
4. Patients with asthma, high intraocular pressure, narrow angle glaucoma, peptic ulcer, pyloric obstruction, bladder neck obstruction and other diseases;
5. Patients who use other antiemetics, such as vitamin B6, ondansetron, metoclopramide, prednisone, etc
6. Patients who are effective in conservative treatment (adjustment of diet and life style);
7. Patients with abnormal physical examination or laboratory examination;
8. Patients with mental disorders;
9. Patients who are allergic to doxyramine, other antihistamines, pyridoxine hydrochloride and any non active ingredients in diclicin;
10. Patients with monoamine oxidase (MAO) inhibitors;
11. The object of driving or operating heavy machinery;
12. Subjects who use alcohol or other central nervous system inhibitors such as diazepam, phenobarbital, etc.
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