My father is a 75 y.o. male who tells me he feels weak, like he is shaking on the inside and is sweating profusely at various times. He has had his thyroid removed, take levothyroxine 125 mg daily and has recently been tested. He also has a condition with his heart where his blood pressure drops suddenly and he passes out. I cannot remember the exact diagnosis, but he is taking acebutolol 200 mg daily. I am concerned that he is having a t.i.a.