I Have Been Using Atenolol And Losartan For Many Years.

I have been using atenolol and losartan for many years. I have recently had my lungs to fill with fluid, which caused congestive heart failure. When I left the hospital today, my attending physician put me on Coreg, which I had been receiving there. Supposedly it will take the place of both of the others. What is your opinion? Am I safe with this?