Was on Metoprolol Succinate ER for about 3 months. It worked well at controlling heart
rate and BP and reducing a-fib, but the side
were terrible, including: hair thinning, memory problems, inability to concentrate, digestion troubles, hearing/vision problems, eye pain, extreme exhaustion, and probably others that've been forgotten now. However, many of these problems occurred at the higher dosage (100mg/day); when at lower dosage (25/mg day) felt much better.