I started to use toprol the generic type 3 weeks ago, I have the ...

I was prescribe toprol in Jan. 2007. Started at 50 mg. felt good for a while.Then I started having panic attacks, blurred vision and noticed that my hair was coming out in large clumps. My drain after a shower looked like three of me had washed their hair instead of just one. My hair now is so thin and brittle I am afraid to even blow it dry. My doctor has gotten me down to 12.5 mg. I want to go off of it completely. How long do you need to be to be on 7 mg till you can completely stop this horror of a drug. I feel so betrayed by my doctor for prescribing this in the first place. I am so scared it isn't even funny.