Diltiazem is a medication that is used to treat various heart conditions. There are two forms of this medication: diltiazem CD and diltiazem ER. Both of these medications work in similar ways, but there are some differences between them.

Diltiazem CD is a sustained-release form of the medication. This means that it is released slowly over time, which helps to keep the blood pressure stable. Diltiazem ER is an extended-release form of the medication. This means that it is released slowly over time, but it also stays in the body for a longer period of time.

The main difference between …