Er Chen Pill has no obvious harm when taken under the correct dosage. Er Chen Pills is a proprietary Chinese medicine, composed of Chen Pi, Semixia, etc. In the formula, Chen Pi has the efficacy of regulating qi, expelling phlegm and harmonizing the stomach; Semixia has the efficacy of drying dampness; the combination of all the formulae has the efficacy of drying dampness and expelling phlegm, and there is also the effect of regulating qi, harmonizing the stomach and it is effective for phlegm-dampness stagnation caused by phlegm and cough, and also has the efficacy of nausea and vomiting, and it can also treat the chest distension and stuffiness. From the drug description of Er Chen Pills, there is no obvious harm or adverse effect when the product is taken under the correct dosage and within the adaptive range. The adverse effects of Er Chen Pills are not clear, you need to avoid spicy, greasy food. Patients with bronchial dilatation, lung abscess, pulmonary heart disease, pulmonary tuberculosis should be taken under the guidance of a physician. If the patient takes the drug during high fever, body temperature over 38 ℃, or the emergence of wheezing and shortness of breath, or cough aggravation, sputum increased significantly should be to the hospital. For long-term use, consult a physician or pharmacist. This product is prohibited for those who are allergic to this product, and should be used with caution by those with allergies. Before taking this medicine, it is necessary to be guided by a traditional Chinese medicine practitioner for identification, and not to take the medicine by oneself, so as not to cause adverse consequences to the body.