The main active components of licorice are glycyrrhizic acid, glycyrrhiza flavone and glycyrrhiza polysaccharide, etc. Functions of glycyrrhizic acid include relieving cough and reducing phlegm, heat-clearing and detoxifying, anti-bacteria, anti-inflammation, liver protection, etc. As is a component with strong biological activity, Glycyrrhiza flavone features anti-oxidation, anti-ulcer, anti-bacteria, anti-inflammation, blood lipid reducing, anti-tumor, anti-HIV and liver protection.
As a palliative, licorice liquid extract is often used with medicines for the relieving cough and reducing sputum. It can reduce irritation to pharyngeal mucosa, relieve gastrointestinal smooth muscle spasm and play a deoxycorticosterone-like role. It is used to treat bronchitis, pharyngitis, bronchial asthma, chronic adrenal cortex hypoxia, etc.
Mono-ammonium glycyrrhizinate has certain anti-inflammatory, liver protecting and liver improving effects; it also has hormone-like activity with no side effect of hormone. It not only has remarkable curative effect on respiratory system diseases such as trachitis, bronchitis, cough and asthma, but also has remarkable effect on digestive tract infection, hepatitis B, oral ulcer and gastric ulcer.