Many drugs can interact with diltiazem, and your doctor may need to change your treatment plan if you use certain other medicines. The following are common drugs that interact with diltiazem;
Medications used in anesthesia;
Anti-anxiety medications called benzodiazepines (such as midazolam, triazolam, and others) as well as busipirone;
Beta-blockers (such as atenolol, carvedilol, metoprolol, propranolol, sotalol, and others);
Carbamazepine;
Cimetidine;
Clonidine;
Digitalis;
Quinidine;
Rifampin; and
Cholesterol medication called statins (such as atorvastatin, lovastatin, simvastatin, rosuvastatin, and others)
Not all possible interactions are listed in this medication guide.
Other prescription and over-the-counter medicines, vitamins, and herbal products may interact with diltiazem. Tell your doctor about all medicines you use, and those you start or stop using. Give a list of all your medicines to any healthcare provider who treats you.
 Diltiazem drug interactions (more detail)
