Does coreg (carvedilol) help mitral valve prolapse and does it causes hair loss?

Sort of, and yes.: This is a bit outside my territory, but if memory serves, Coreg (carvedilol) is used to treat congestive heart failure and high blood pressure; so it might help to lessen some of the effects of mitral valve prolapse if it is severe enough, but it isn't designed specifically to treat it. As for hair loss, any drug can cause temporary hair loss. With time, the hair nearly always grows back.