The active ingredient of Fluimucil® is acetylcysteine. This active ingredient has a secretion-dissolving effect and is therefore used for treating colds and similar respiratory diseases.

Principle of action of Fluimucil

If pathogens (e.g. viruses or bacteria) penetrate the nose or bronchial tubes, the mucous membrane there reacts by secreting larger amounts of fluid. The aim of these secretions is to flush away the invading pathogens and thus remove them from the body. If this mucus cannot be removed quickly enough, it accumulates in the affected areas.

This results in ideal growth conditions for bacteria, which easily settle and multiply unhindered due to additional insufficient aeration of the mucousy areas. Fluimucil® as a dissolver of the secretion liquefies the mucus and thus facilitates the body’s own removal of excess fluids. This works by acetylcysteine breaking the bonds between the individual mucus molecules and thus reducing the viscosity of the secretion, making it easier for the mucus to flow. Through this mechanism, Fluimucil® prevents inflammation and can effectively relieve coughing attacks when coughing is stuck.

Package sizes

Acetylcysteine is available in pack sizes of 20, 50 or 100 capsules.


If a mucolytic drug such as acetylcysteine is used, it is essential to ensure that a sufficient amount is drunk so that the body’s fluid balance is not thrown off balance when liquefied secretion is withdrawn from the body to remove foreign bodies and pathogens. A liquid of at least 1.5 – 2 liters (water or unsweetened tea) is considered sufficient. Liquefied mucus can also be supported by the inhalation of water vapour, to which additional dissolving agents can be added by tea or essential oils.


Fluimucil® should not be used if the patient has a known hypersensitivity to one of the ingredients or is a child before the age of one year. Even during pregnancy or breastfeeding, Fluimucil® should only be taken if absolutely indicated by the doctor, otherwise it is not recommended.