I was on Toprol XL for 6 years. This drug is not good. I am a 47 year old women that weighs about 120 and am 5'3". I have had HBP since I was 30 and have tried most of the medicine out there to try and control it. Toprol made me feel horrid. No sex drive, tired all the time, sometimes so tired I couldn't even get out of bed, dizzy, chest pains and tightness, feels like my throat is closing, panic attacks.... the list just goes on. I am now on Azor and it seems to work great for me. Coming off Toprol was another nightmare and it took me several months to completely wean myself off of it. Today is my 5th day completely Toprol free and I am starting to feel like me again.