These are the drugs which inhibit the entry of the calcium into the cells or mobilization of the calcium from the intracellular stores resulting in:
- Slowing of the atrioventricular conduction.
- Slowing of the sinoatrial conduction.
- Relaxation of the arterial smooth muscle and the cardiac muscle.
- It is used in the treatment of angina, cardiac arrhythmias, and hypertension.