Adverse reactions such as nausea and vomiting are generally possible with aminophylline tablets, and it is the overdose that may cause harmful symptoms such as cardiac arrhythmias, convulsions, and respiratory arrest. Aminophylline tablets are a type of bronchodilator medication indicated for the relief of wheezing symptoms in bronchial asthma, wheezing bronchitis, and other diseases. Adverse reactions such as nausea, vomiting, and insomnia are generally only possible during administration of the drug at moderate serum concentrations. When the dosage is excessive, it may cause tachycardia, arrhythmia, fever, convulsions, etc., and even lead to respiratory and cardiac arrest, causing death. In addition, aminophylline is contraindicated in patients who are allergic to the drug, have active peptic ulcers, and uncontrolled convulsive disorders; the drug should be used with caution in pregnant women, women in labor, breastfeeding women, children, and the elderly over 55 years of age. Aminophylline tablets need to be applied under the supervision of a doctor and taken in strict compliance with medical advice.