Can Diltiazem and Sustained-release Theophylline Tablets be taken together?
Diltiazem is available in various formulations including tablets and injections. Diltiazem and theophylline sustained-release tablets generally should not be used together. If any adverse symptoms occur, it is recommended to seek medical attention at a hospital as soon as possible, and then follow the doctor's instructions for treatment.

Diltiazem is a calcium channel blocker primarily used to treat hypertension and angina pectoris. Theophylline sustained-release tablets, on the other hand, are bronchodilators commonly used to treat asthma and chronic obstructive pulmonary disease (COPD). There is a risk of drug interaction between these two medications. Diltiazem may interfere with the metabolism of theophylline, leading to increased blood concentrations of theophylline and thereby increasing the risk of toxicity, such as nausea, vomiting, and arrhythmia. Therefore, these two drugs should not be used concurrently.
In actual medication use, if circumstances require the use of both drugs, patients should consult professional doctors or pharmacists for advice, and formulate a reasonable medication plan based on their medical condition and physical status. Meanwhile, patients should closely monitor their physical condition during medication. If any adverse symptoms occur, the medication should be stopped immediately and medical treatment sought.
Patients should maintain a healthy lifestyle, avoiding smoking and alcohol consumption to promote overall health.