All forms of tracheobronchitis, emphysema with bronchitis pneumoconiosis, chronic inflammatory pulmonary conditions, bronchiectasis, bronchitis with bronchospasm asthma. During acute exacerbations of bronchitis it should be given with the appropriate antibiotic. Respiratory tract disorders associated with increased or viscous mucus. Reducing mucus and helping with breathing in various lung conditions like cystic fibrosis.