Mecysteine is known as a mucolytic agent, which means it breaks down mucus. It works by breaking some of the chemical bonds between the molecules in mucus. This makes brochial mucus less viscous (thick and sticky) and thus easier to cough up.Medicines that make mucus less thick and sticky are useful for people who suffer from chest problems such as bronchitis, asthma and cystic fibrosis as well as for those who have an artificial airway opening in their neck (tracheostomy).

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.