The main indications of dihydroxypropyl theophylline are the treatment of wheezing symptoms such as bronchial asthma, wheezing bronchitis and obstructive emphysema, while cardiogenic asthma can also be treated with dihydroxypropyl theophylline. Its mechanism is similar to that of theophylline, which mainly relaxes the smooth muscle of the respiratory tract directly and relieves wheezing symptoms. Contraindications: The product is contraindicated in patients with allergy, peptic ulcer, and uncontrolled convulsions. The side effects of dihydroxypropyltheophylline are generally nausea and vomiting, arrhythmia, etc. Dihydroxypropyltheophylline is relatively widely used in clinical practice, but it cannot be used at home by itself. Because if the amount of dihydroxypropyl theophylline is too much, it may also cause symptoms of poisoning, so it should be used with caution at home, and must be applied according to medical advice.