The precautions of Astragalus Chen Pi in water are that it is not suitable to take Astragalus when there is an abundance of superficial solidity and evil, and it is prudent to take Chen Pi when there is a deficiency of Yin and dryness and cough, and it should be used in accordance with the doctor’s instructions. Astragalus should not be used for those who are full of superficial and solid evil, those who have sores and ulcers at the beginning, or those who are full of heat and toxin after sores and ulcers have collapsed. Pericarpium Citri Reticulatae should be used with caution in cases of yin deficiency and dry cough, vomiting of blood, and internal solid heat. Adverse effects of Astragalus and Pericarpium Citri Reticulatae are not clear. Astragalus has the effects of tonifying qi and elevating yang, consolidating the surface to stop sweating (stopping sweating by consolidating the surface of the muscle), inducing diuresis to reduce swelling, generating body fluid to nourish blood, and supporting toxin to expel pus (expelling pus and toxin from the body). It can be used for the diseases such as qi deficiency and weakness, surface deficiency and spontaneous sweating (due to the weakness of muscle surface and frequent natural sweating), qi deficiency and edema, carbuncle and gangrene (a kind of poisonous sores, occurring in the surface of the body, limbs, internal organs of the acute suppurative disease) and difficult to ulcerate. Pericarpium Citri Reticulatae has the efficacy of resolving phlegm and drying dampness, regulating qi and strengthening the spleen. It is used for vomiting and diarrhea, low food intake, epigastric (abdominal) distension, and coughing with excessive phlegm. Astragalus with Chen Pi infusion effective dose is limited, difficult to achieve the therapeutic effect, should be in the doctor under the guidance of the identification of standardized use.