I was on 2 heart medications for over a year. In April I started taking toprol alone. I have been gaining weight rapidly like 6 or 7 lbs. in 2 months. I also have tingling in hands, a numbness, and burning which wakes me up at night. Is this from the toprol? I was happy to hear others had the same side effects. I have lower back pain and my legs hurt. I couldn't figure out why I was gaining all this weight. Maybe it is the toprol taken alone.