Cang Er refers to the Chinese medicine Cang Er Zi. Goose weed and Cang Er Zi can be taken together, and there is no contraindication for the two. The specific use of medication to follow the doctor’s instructions. Cang Er Zi is poisonous, internal use should be cautious. Goose is pungent and warm in nature, with the efficacy of dispersing wind-cold, clearing nasal orifices, resolving phlegm and relieving cough, it can be used to treat wind-cold cold and flu, nasal congestion, cold phlegm and coughing, carbuncle and swelling and toxicity. Individuals with symptoms such as nausea or mild vomiting should be cautious. Cang Er Zi tastes bitter, pungent, warm in nature, with the efficacy of dispersing wind-cold, clearing nasal orifices, dispelling wind-dampness and relieving pain, it can be used for treating wind-cold and cold, nasal abyss (mainly manifested as obscene nasal mucus, which is too much to be wiped away), rheumatic paralysis, wind rash and itching, etc. It is toxic and should not be taken internally. This product is toxic and should not be taken internally in excess. Blood deficiency headache should not be taken. In summary, the goose does not eat grass and Cang Erzi and no contraindications, the two can be taken together. But the specific medication should be under the guidance of a physician, do not blindly use their own medication, so as not to cause adverse reactions.