Dextromethorphan and Etanercept (i.e., Ambroxol Oral Liquid) are generally not compared due to their different indications, and there is no such thing as which one works better. Dextromethorphan is a centralized cough suppressant, mainly used to treat dry cough, including cough caused by upper respiratory tract infections (such as colds and pharyngitis) and bronchitis. The main effects of Ambroxol Oral Liquid are bronchodilating and phlegmatic, which is used for the treatment of cough, thick sputum, difficulty in expectoration and wheezing caused by acute and chronic respiratory diseases. Dextromethorphan adverse reactions are: dizziness, drowsiness, etc.; take the drug need to pay attention to: pregnant women, patients with a history of psychiatric disorders or breastfeeding women is prohibited. Adverse effects of Ambroterol Oral Liquid can be seen: headache, hand tremor, drowsiness, etc.; take the drug need to pay attention to: hyperthyroidism, hypertension, cardiac insufficiency, diabetes mellitus, severe renal insufficiency patients with caution. These two drugs should be used under the guidance of a physician, do not blindly use drugs, so as not to cause adverse consequences.