Chest Discomfort After Taking Coreg. Passing Blood In Urine And Stool. Due To Medicine?

My mother started on coreg over 2months now and was having problems with being tired in her chest then she wasn t thinking very well. Had to be put in the hospital and her dosage of coreg was upped she then started seeing snakes on the walls and just about has lost it. She still knows me but can t concentrate well enough to carry on a real conversation. She will start with silly rhyming and things like that. She went from hospital to rehab and last weekend she started passinf==g blood in her stool earlier this week she started passing some red blood in her urin and last night started passing blood clots in her urine . Her family dr. will not take her off og the coreg unless her heart dr. says its ok. I really think this stuff has done a jobe on my mother and they don t want to believe me.