What is a calcium channel blocker?
Calcium channel blockers are used to help control certain heart rhythm disturbances. Diltiazem is a calcium channel blocker that is used to help control certain heart rhythm disturbances and to promote heart muscle relaxation in hypertrophic cardiomyopathy (especially in cats). Adverse effects are uncommon at standard doses but can include decreased appetite, slow heart rate, and rarely, other stomach/intestinal or heart effects.