The difference between Ambroxol Capsules (Ambroxol Hydrochloride Capsules) and Oral Liquid (Ambroxol Hydrochloride Oral Liquid) mainly lies in the differences in dosage form, adverse effects, and the cautious use of the population. 1. Dosage form: Ambroxol hydrochloride capsules belong to capsule dosage form, and ambroxol hydrochloride oral liquid belongs to oral liquid dosage form. 2. Adverse reactions: the former may cause gastrointestinal discomfort, stomach pain, diarrhea, rash and other adverse reactions; the latter may cause stomach pain, nausea, rash, skin rash, itching, skin swelling, dyspnea, fever, chills, allergic reactions and other adverse reactions. 3. Prudent use of the crowd: the former should be used with caution in the third trimester of pregnancy; the latter should be used with caution in pregnant and lactating women, serious liver disease or renal insufficiency, hereditary fructose intolerance, bronchial disease with excessive secretion. The main ingredient of the above two drugs is Ambroxol hydrochloride, which is a mucolytic agent, and is suitable for acute and chronic respiratory diseases, such as acute and chronic bronchitis, bronchodilatation, bronchial asthma, tuberculosis and other acute and chronic respiratory diseases caused by sputum viscous, coughing up sputum difficulties. Contraindications include hypersensitivity to the product. Specific use of the drug should be carried out under the guidance of a specialist, the emergence of allergy-like symptoms should be promptly consult a doctor.