The main effect of Acetylcysteine Tablets is to dissolve phlegm, the use of the drug may cause adverse reactions, such as may lead to gastrointestinal symptoms, allergies or cough and other related manifestations. 1. The efficacy of acetylcysteine tablets, the drug is a kind of mucous phlegm solubilizer, can dilute phlegm, promote phlegm, has a better effect of phlegm. 2. Adverse effects of Acetylcysteine Tablets, although the drug is generally safe, it may cause adverse reactions in the digestive tract, such as nausea, vomiting, epigastric discomfort and diarrhea. It may also cause allergic reactions, leading to skin rashes, as well as coughing and even bronchial spasms in a few cases. In the clinic, acetylcysteine tablets need to be regulated under the guidance of offline doctors, and those who are allergic to the product need to be prohibited.