I've been experiencing increased side effects, allergic in nature over past year with Atenolol. Tried to transition from Atenolol to Bystolic on 10-1-14 but it drove BP & Pulse ↑↑ for me. Im normal ly 107-70 to 120/80 BP & Pulse of 70s-80s. By 4p 10-3-14 Bp was in 150s & Pulse 136. Cardio said Stop Bystolic immediately, go bacj to Atenolol. Now having bad side effects but BP/Pulse lower. I have 3.125mg Coreg & want to transition to it