I think you are referring to a drug called "COREG" an Alpha/Beta blocker. This drug is mainly used and has excellent results for heart failure. This drug is supposedly very potent, and similar to other beta blockers causes fatigue. Usually doctors prescribe Toprol or Atenolol (beta blockers) first. Lately there have been recalls for Metoprolol and Toprol generics and Atenolol is getting negative press. Maybe your doctor feels Coreg is a safer choice. I take a beta blocker called Bystolic, which is the newest and latest beta blocker to be sold in the U.S. Many doctors are prescribing only Bystolic without any other medications because of it's proven efficacy. In my opinion, I believe your blood pressure is not that high to add a 3'rd drug. I am not a doctor but I do believe doctors are too quick to jump and prescribe extra medications which are not always needed. This is a way to extend continuous followup visits. I think just a diuretic is usually enough to keep blood pressure at safe levels and to eliminate excess fluids. If stress or anxiety is noted to be an issue than a beta blocker is a better choice. According to my doctor, Coreg is a drug which is reserved for more severe forms of heart failure. For most others Toprol is the best choice.