I also have developed a hoarse voice and at first questioned Carvedilol, but it turned out to be caused by a Hiatel Hernia and my vocal cords were burning out from
stomach acid. I now talk like Kim Carnes sings, and a recent surgery called a Nissen Fundoplication stopped the GERD, and my vocal cords are no longer eroding, among other symptoms. If your voice is changing you might check that out, but it wasn't related to Carvedilol.