Cherno is also known as eucalyptus-pin enteric softgels. Acetylcysteine and eucalyptus-pin enteric softgels are two different types of mucolytics, both of which work as expectorants, inducing mucus to dissolve, thinning phlegm, and facilitating phlegm expulsion. The main components of eucalyptus pinene are eucalyptus oil essence, limonene, etc. This drug can improve the ciliary movement of tracheal mucosa, promote the secretion of respiratory glands, and promote the expulsion of phlegm, and it is mainly used in the treatment of acute and chronic bronchitis, pneumonia, and bronchial dilatation. Acetylcysteine is a traditional expectorant, the main ingredient is acetylcysteine. Unlike eucalyptus-pin, acetylcysteine is available in a variety of dosage forms, including granules, tablets and capsules, and is suitable for expectorant use in both adults and children, while eucalyptus-pin’s dosage form is not suitable for children. Both should be taken with warm boiled water and cough suppressants should be used with caution during administration.