Although Chen Pi infusion has the effect of relieving cough, food accumulation and stomach pain, it also has certain contraindications, such as constipation patients will have side effects on the body after drinking it. The main reason is that although Chen Pi is a pungent, bitter and warm Chinese medicine herb, it also has certain dryness characteristics, which can aggravate the real heat in the body and cause severe constipation when consumed by constipated patients. In addition, the following groups of people are not recommended to drink Chen Pi infusion: 1, pregnant women: If pregnant women have a deficient qi body dry or yin deficiency dry cough, after drinking Chen Pi infusion will aggravate the yin deficiency, and then there are obvious palpitations and shortness of breath, dizziness, poor mental state and other discomfort; 2, people with excessive stomach acid: this group of people often accompanied by loss of appetite, nausea, acid reflux, heartburn and other uncomfortable symptoms, mainly due to stomach fire, qi deficiency caused by. At this time, drinking Chen Pi infusion will increase the secretion of gastric acid; 3, some people taking western medicine: during the taking of calcium carbonate, magnesium sulfate, ferrous sulfate, aluminum hydroxide, bismuth carbonate and other western medicine, it is not recommended to use Chen Pi infusion. Because the peel contains flavonoids, will affect the absorption of western drugs. In addition, Chen Pi infused water should not be used at the same time with Toltrazurin, phenibut and other alpha-blockers to avoid certain effects on the antihypertensive effect.