Aminophylline can directly diastole the airway smooth muscle and dilate the airway, and it also has mild anti-inflammatory and immunomodulatory effects, which can treat wheezing and dyspnea, mainly for wheezing and dyspnea caused by asthma, wheezing bronchitis, chronic obstructive pulmonary disease, heart failure, pulmonary edema, etc. The contraindications of aminophylline are that it is prohibited for patients who are allergic to aminophylline, as well as patients with gastric ulcer and myocardial infarction. Side effects of aminophylline, common adverse reactions are mainly nausea, vomiting, abdominal pain, diarrhea and other gastrointestinal reactions, a few patients can appear anxiety, insomnia and other central nervous system manifestations, some patients also have palpitations, polyuria, hypokalemia, cardiac arrhythmia and other manifestations. The amount of aminophylline poisoning is very similar to the therapeutic amount, so you must pay attention when taking aminophylline in general, because when aminophylline is acutely poisoned, serious cardiac arrest may even occur, so don’t smoke, drink alcohol or coffee during taking the medicine, and also pay attention to taking the medicine according to the dose, not to increase the dose and frequency by yourself. It is best to apply the combination of drugs under the guidance of a doctor, because many drugs can cause aminophylline to accumulate in the body.