For adults, acetylcysteine granules should be taken 1 sachet 3 times a day. Children, half a packet once a day, 2 to 4 times a day, can be dissolved in a small amount of warm water and taken directly by mouth. Acetylcysteine granules, specification 0.2g, the main ingredient is acetylcysteine, is soluble fine particles, gas aromatic. Used in the treatment of chronic bronchitis and other cough with mucus phlegm and not easy to cough out patients. Acetylcysteine granules for asthma patients, peptic ulcers, allergy, elderly patients with severe respiratory insufficiency is prohibited; on the respiratory mucosa has an irritating effect, so sometimes cause choking or bronchospasm. Some patients may cause nausea, vomiting, runny nose, etc., and occasionally cause hemoptysis and other adverse reactions. It is recommended that when taking acetylcysteine granules, use them in strict accordance with medical advice to avoid adverse effects caused by blind use of medication.