I am not a doctor but as a patient with a lot of experience with beta blocker medication, including the one you are taking, I can say I consider 50 mg a day to be a moderate level does, but if it causes very
low heart
rate, I consider anything under 50 to be very
low, and some dizziness the lower dose seems to be a good change,
Given you seem to be moving toward a more normal heart rate and I didn't see any mention of problems from the reduced dose it seems to me you may have found the co