I have been on Atenolol 25 mg/day for 10 years to control rapid hate rate... NOT HIGH BLOOD PRESSUE. After complaining of extreme cold hands and feet my doct told me could be side effect of taking atenolol for so long. She gave me free sample of Bystolic 2.5mg a day. After reading some links I am afraid to take this medication. My BP was 110/70 today and I do not want it to go lower..any advice