slow heart rate

I've been put on ramipril and 2.50 of bisoprolol my heart rate is between 55 and 66 is that to low .I'm  a 63 year old female 

I am 62 yr female and on 3.75 bisoprolol which I would like to reduce but GP says my bp and pulse is fine. The last time he took my pulse was about 2 weeks ago and it was 52 which which he was happy. I keep track of bp/pulse - today it was 51but often it is lower ie 47. As long as I am not dizzy GP says it is OK.

Thank you  ,I feel better knowing this. 

My medics say the same. I think they aim for the range you are experiencing as a sign of successful beta blockage!  However, my bpm oftern falls below 48, as low as 41, especially when lying in bed, and this is too low to feel comfortable for me.  Dizziness hasn't happened but I sometimes wake up feeling really bad - weak and ill.  Maybe the two are connected as my bp is also very low.

Thanks Pam  had some test done yesterday treadmill stress  ,2d echocardiogram and on the 19th will have Perfusion scan  stress test .I'm getting great care but of course you don't get results for weeks .I hate running to doctors for every little thing .I feel better with everyones replies as I have  never had this problem before ,Thank you