Theophylline extended-release tablets can be taken during targeted medications, but you need to pay attention to the dosing interval. Theophylline extended-release tablets should not be taken with other medications. Be sure to arrange the time and frequency of taking Theophylline Extended-Release Tablets and other targeted medications under your doctor’s supervision. Generally speaking, between the drugs, at least need to be separated by about 1 hour. If multiple drugs are taken at the same time, it can affect the distribution, absorption, metabolism and excretion of the drug as well as the binding of the drug to proteins, and even the effect of the drug on neurotransmitter receptors. The main ingredient of theophylline extended-release tablets is anhydrous theophylline. It has the effect of improving respiratory function. It is suitable for bronchial asthma, wheezing bronchitis, obstructive emphysema and other relief of wheezing symptoms; it can also be used for wheezing in heart failure. Adverse effects of Theophylline Extended-Release Tablets mainly include loss of appetite, nausea, vomiting, gastrointestinal bleeding, headache, and irritability. It is contraindicated in patients who are allergic to the drug, as well as in patients with active peptic ulcers, and also in patients with uncontrolled convulsions. Consult your physician and a professional pharmacist before taking the drug, do not take the drug on your own to avoid adverse consequences.