Oil Gan is oil citrus; oil citrus juice is a drink made of oil citrus as the main raw material, oil citrus is also known as Yu Gan Zi; this product has the effect of clearing away heat and relieving phlegm, moistening the lungs and resolving phlegm; the role of the treatment of diphtheria, cough and other illnesses. Eugenol belongs to a kind of traditional Chinese medicine, also called Dian olive, olive, bergamot, for the Euphorbia plant Eugenol fruit; its taste is bitter, sweet and sour, cool in nature, into the liver, lung meridian; the drug has a clearing of heat and throat, moistening the lungs and resolving phlegm, the efficacy of the production of fluids and quenching thirst (to promote fluid production to alleviate thirst); for the cold and flu, fever, cough, diphtheria, irritability (irritability and sultriness), hypertension and other conditions with a therapeutic effect. Adverse effects and contraindications of Eugenia caryophyllata are not known; care should be taken when using it, and caution should be exercised when using it for cold spleen and stomach. Oil citrus juice used for beverage drink may lead to its active ingredients release insufficient, resulting in a decrease in the efficacy of the drug, usually need to be boiled correctly in order to achieve the therapeutic effect. If you need to use the drug, you should use the drug under the guidance of the physician’s diagnosis, and should not purchase the drug on your own to avoid delaying your condition.