The difference between Ambroxol Hydrochloride Oral Solution and Ambroterol Oral Solution mainly lies in the drug composition, adverse reactions, contraindications, pharmacological effects and so on. 1. Ingredients: Ambroxol hydrochloride oral solution is mainly composed of ambroxol hydrochloride, and ambroterol oral solution is composed of ambroxol hydrochloride and clenbuterol hydrochloride. 2. Adverse reactions: Ambroxol hydrochloride oral solution is usually well tolerated, a few may experience mild gastrointestinal discomfort, allergic reactions, headache, dizziness and so on. Ambroxol oral solution may also experience adverse reactions such as palpitations, tachycardia, and elevated aminotransferases. 3. Contraindications: Both drugs are contraindicated for allergy, and the contraindications for Ambrotyl oral solution also include hypertrophic cardiomyopathy. 4. Pharmacological effects: both contain Ambroxol hydrochloride, which is a mucolytic agent that reduces the secretion of mucous glands and lowers the viscosity of sputum. Ambroxol oral solution also contains clenbuterol hydrochloride, a beta agonist, which can relax bronchial smooth muscle and promote sputum discharge. The specific use of these two drugs depends on the condition, and it is recommended that the medication be used as prescribed by the doctor.