The beta blocker had too many side effects and did not reduce bp well enough. ace inhibitor is now substituted. could this reduce the pressure better?

Probably yes: Many people will find that although both beta blockers and ace inhibitors are blood pressure lowering medications, ace inhibitors will work better for them regarding blood pressure reduction. Ace inhibitors have additional benefits in patients with diabetes, kidney disease, and heart structure problems. Beta blockers have benefits regarding heart rhythms, heart rate, and heart structure problems.

Depending on Pt: Each pt is different. People respond to different meds differently. Some pts ace inhibitor works very well. Some pts it does not. We have to try one med at a time and see if it works. If it doesnt will try next option.