The purpose of this study is to test whether carvedilol can reduce the occurrence of heart problems during your cancer treatment. Carvedilol (Coreg®) is a medication that is FDA approved and used to treat congestive heart failure and high blood pressure and is not a new medication. It has been shown in small studies to protect the heart from side effects of chemotherapies such as doxorubicin (Adriamycin®) and trastuzumab (Herceptin®). The effects of carvedilol will be compared to the usual approach. Previously, people who were already taking a beta blocker, angiotensin receptor blocker (ARB), or angiotensin converting enzyme (ACE) inhibitor were able to take part in the study. The study has reached the maximum number of people allowed who are already on those treatments now, so, you must not be taking these types of drugs in order to be part of the study. There will be about 817 people taking part in this study.

The purpose of this study is to test whether carvedilol can reduce the occurrence of heart problems during your cancer treatment. Carvedilol (Coreg®) is a medication that is FDA approved and used to treat congestive heart failure and high blood pressure and is not a new medication. It has been shown in small studies to protect the heart from side effects of chemotherapies such as doxorubicin (Adriamycin®) and trastuzumab (Herceptin®). The effects of carvedilol will be compared to the usual approach. Previously, people who were already taking a beta blocker, angiotensin receptor blocker (ARB), or angiotensin converting enzyme (ACE) inhibitor were able to take part in the study. The study has reached the maximum number of people allowed who are already on those treatments now, so, you must not be taking these types of drugs in order to be part of the study. There will be about 817 people taking part in this study.