Ambroxol’s medication expectoration time depends on the patient’s condition and personal constitution. 1. Ambroxol is suitable for sputum is more thick, not easy to cough out. 3 months of pregnant women and allergic to the person is prohibited. It should be used with caution in breastfeeding women. 2. Ambroxol, as a mucolytic agent, can only dilute sputum, and is useful for coughing and phlegm symptoms. For this type of patients should identify the cause of the most common respiratory infections, such as bacteria, viruses, mycoplasma and other pathogens should be treated separately. 3. In addition, there are cardiovascular disease and pleural disease can cause cough and sputum, should be specific cause specific treatment. If cough and sputum symptoms, should also promptly consult the doctor to identify the cause of the disease.