I am 75. I take 50 mg Metroprolol Succ., 5 mg Amlodopine, 100 mg Losartan, and 37.5/25mg of Triamterene/HCTZ for blood pressure. Now I am asked to add 5 mg daily of Terazosin. My heart rate is 53 and I have occasional tachycardia and atrial fibrillation. Is taking Terazosin dangerous for me?