I am not sure what "getting worse" means, but I didn't not do well on metoprolol. Yes, it impacted my heart rate to the point that it was in the low 50s resting and only in the mid to upper 70s when I was involved in some activity. Since I am way past being an active athlete, that is too slow. I felt lethargic and I had pain and a kind of numbness in my legs below my knees. I went off of metoprolol about 2 months ago and the change/improvement was almost instantaneous. No more problems with my legs and I generally feel much better and have gone back to long walks in the morning. My heart rate is now in the mid 60s resting and in the mid 80s with activity.