Final answer:
Nondihydropyridine calcium channel blockers can be harmful, as they may cause side effects like low blood pressure and abnormal heart rhythms.
Step-by-step explanation:
Nondihydropyridine calcium channel blockers such as diltiazem or verapamil can be harmful. These medications are used to treat conditions such as high blood pressure and certain heart arrhythmias. However, they can have side effects such as low blood pressure, slow heart rate, and abnormal heart rhythms. It is important for patients taking these medications to be closely monitored by their healthcare provide