Which medication is used to treat heart conditions?

Coreg, or carvedilol, is a medication specifically used to treat heart conditions. It is classified as a beta-blocker that works by blocking certain receptors in the heart and blood vessels. This action helps to lower heart rate, reduce blood pressure, and decrease the heart's workload, making it effective in managing conditions such as heart failure, hypertension, and certain types of heart rhythm disorders.

In contrast, the other medications listed serve different purposes. Proventil HFA is primarily used for the treatment of asthma and other respiratory conditions, as it is a bronchodilator that helps open up the airways. Alesse is an oral contraceptive used for birth control and hormonal regulation, and Byetta is an injectable medication for managing type 2 diabetes by helping to control blood sugar levels. Each of these medications is important in its own right, but Coreg stands out as specifically targeting heart-related issues.