Yu Gan Zi can treat cough and sore throat, and can be taken under the guidance of a professional Chinese medicine practitioner if chronic pneumonia patients suffer from these conditions. Yu Gan Zi is bitter, sweet and sour in taste, cool in nature and belongs to the liver and stomach meridians. It is a traditional Chinese medicine with the efficacy of clearing heat and removing toxins (removing heat and toxins from the body), benefiting the throat, moistening the lungs, generating fluids, resolving phlegm and quenching thirst. It is mainly used in the treatment of cold and fever, cough, sore throat, diphtheria, thirst, irritable heat (irritable and sultry), thirst and hypertension. It is prohibited for those who are allergic to the medicinal composition of Yu Gan Zi. Eugenol should be used with caution in people with spleen and stomach deficiency (weak and cold spleen and stomach) as well as allergies. There are no known adverse drug reactions after taking Eugenol. People with chronic pneumonia who suffer from cough and thirst as mentioned above can take Yu Gan Zi under the guidance of a professional Chinese medicine practitioner, and should consult a hospital if there is no relief after taking the medicine.