My Husband Started Taking 5mg Capsule Terazosin Each Day. Has

My husband started taking 5mg capsule Terazosin each day. Has taken it twice @7:00 pm and both times has not felt well by next day late morning. He also takes losarten 100 mg and simvastatin 20 mg. I took his blood pressure today when he said he didn't feel well and it was97/61 took again and it was 101/64 pulse 86. What do you think? Will side effects get better?