Patient was educated on Diltiazem and its mechanism of action as follows: Entry of calcium ion through the calcium channels, into the cells lining the blood vessels is needed for narrowing or constriction of blood vessel, which results in elevated blood pressure. Entry of calcium ion into the SA node cells, which is the natural pacemaker in the body, is also needed to initiate a normal heartbeat in the pacemaker cells. Diltiazem is a calcium [...]