What Acetylcysteine 600 mg effervescent tablets are used forAcetylcysteine is used in the treatment of airway diseases such as bronchitis (inflammation of the mucous membrane in the airways), emphysema, mucoviscidosis (cystic fibrosis) and bronchiectasis (chronic widening of an airway passage). Do not use Acetylcysteine 600 mg effervescent tablets If you are allergic to Acetylcysteine or any of the other ingredients of this medicine. Children under 2 years of age may not use this medicine. Possible side effectsIf any of the following side effects occur, immediately stop using Acetylcysteine 600 mg effervescent tablets and contact your doctor or go the emergency room of a nearby hospital. Shock (severe drop in blood pressure, paleness, restlessness, weak pulse, clammy skin, decreased consciousness) due to a sudden widening of the blood vessels as a result of severe hypersensitivity to certain ingredients (anaphylactic shock). Sudden fluid accumulation in the skin and mucous membranes, breathing difficulties and/or itching and skin rash. Other medicines and Acetylcysteine 600 mg effervescent tablets If you are using other medicines, do not dissolve them together with Acetylcysteine 600 mg effervescent tablets. If you need to use medicines to control or prevent infections (antibiotics), you are advised to take these two hours before or after Acetylcysteine 600 mg effervescent tablets. Cough suppressants should not be used at the same time as Acetylcysteine 600 mg effervescent tablets, as you must be able to cough up the loosened phlegm.