As a traditional Chinese medicine, Psidium guajava has the efficacy of moistening the intestines and relaxing the bowels, dispersing knots and broadening the chest, clearing heat and resolving phlegm, and is consumed as a decoction in soup or in pills or powder. Psidium guajava is the mature fruit of Juniperus communis of the Cucurbitaceae family, which is sweet, slightly bitter and cold in nature, with the efficacy of moistening the intestines and relaxing the bowels, dispersing knots and broadening the chest, clearing away heat and resolving phlegm, and is mainly used in the treatment of phlegm-heat coughing and asthma, chest paralysis (chest tightness and pain), knotting of the chest, lung carbuncles, bowel carbuncles (carbuncles occurring in the internal organs of the bowels and manifested as fever, pain in the right abdomen, and palpable lumps), mammary carbuncles and intestinal constipation, and other diseases. This product is often used in combination with other drugs, such as with bilberry, Citrus aurantium, Scutellaria baicalensis, can be used to improve phlegm-heat obstruction of the lungs, phlegm yellow cough, sticky and difficult to cough up, chest and diaphragm plumpness (stomach distension and discomfort), etc.; such as with Phellodendron Bidentata, pollen of the smallpox, can be used for dry cough with no sputum, or little sputum viscous, cough unfavorable, etc.. The adverse effects of this product are not yet clear. Note that this product is prohibited for those who are allergic to this product, allergic people should be cautious. If you need to use this product, should be under the guidance of a physician, do not unauthorized use of medication, so as not to cause adverse reactions.