R43 treats bronchial asthma, a condition in which the lungs suffer periodic, reversible narrowing (constriction) of the bronchi . While most conventional medicines treat asthma by targeting the histamine H1 receptor (antihistamines), R43 cures asthma through constitutional improvement ( strengthening body functions, its power of resistance and its reaction to stimuli) . Contains ingredients like Belladona & Natrium Sulf which have known anti asthmatic properties. Also indicated for spastic bronchitis (acute form of obstructive bronchitis due to increased mucus formation and swelling up of the bronchial mucosas).