Mucyst AB Tablet contains active components called N-Acetylcysteine  and Acebrophylline. It treats and prevents asthma and chronic obstructive pulmonary disorder (COPD) symptoms, such as coughing, wheezing, and shortness of breath. It also treats other respiratory conditions such as bronchitis(Inflammation of lung air passages, causing cough and mucus production.), emphysema( lung condition with damaged air sacs, causing breathlessness.), and bronchiectasis(enlarged bronchial tubes due to infections, leading to chronic cough and mucus). This medication can also prevent mucus plugs from forming after surgery or a heart attack. People who are allergic to either of the active ingredients in Mucyst AB Tablet  should not take this medication. This medication should be avoided in cases of severe asthma, peptic ulcer, hemorrhagic disease, and severe renal or hepatic impairment. It can cause bronchospasm in some people, especially those with a history of bronchospasm. Therefore, using it with caution is important for these people. It should not be used by pregnant or breastfeeding women unless necessary. Mucyst AB Tablet can be used in the elderly, but it is important to use it cautiously. It can be used in children over 6, but it is important to use it cautiously.