How quick does Bisopralol work.

[higgy52]

Hi all,

I take Bisoprolol 2.5mg in morning to slow heart rate down 9 months after my ablation, in morning i get up and heart rate is 90 ish, but before i go bed at night heart rate about 60. I do have thyroid trouble as im still on Amiodarone for now,

Any ideas why there is a big difference in heart rate from 9 am high heart rate, to 9 pm low heart rate.

Thank you.