The flower can be drunk in water, but it is not recommended for people with deficiency of Yin and labor cough, wind-heat and dry cough, so as not to damage the health. It is bitter, pungent, salty, slightly warm in nature, and belongs to the lung, spleen, stomach and large intestine meridians. It has the efficacy of lowering qi, eliminating phlegm, promoting water circulation, and stopping vomiting, and can be used to treat wind-cold coughs, phlegm (a pathological product of impaired metabolism of water and fluid) accumulation, and wheezing and coughing with excessive phlegm and other illnesses. Adverse effects of Forsythia are not clear, and Forsythia should not be used by people with deficiency of yin, cough, wind-heat and dry cough. As the surface of the flowers is fluffy, it is easy to irritate the throat and cause choking, coughing and vomiting when drinking water, so it is recommended to use gauze to wrap the flowers when drinking water. If the patient in the flowers in water, appear abnormal body discomfort, should be timely consultation, relevant examination, and under the guidance of the doctor to take relevant therapeutic measures.