Dizzyspell on getting up am from lying to sitting on bed take bisoprolol 2.5mg in evening .next day checked bp lying down 110/56 sitting 122/66 ideas?

The Bisoprolol could: easily contribute to positional blood pressure changes that make you dizzy. There was probably a change in your hydration status between the first day and the second when you had normal BP and were not dizzy. The first day you were probably a little dehydrated. Maintain good hydration and you should in general be asymptomatic.