OnabotulinumtoxinA
"I had numerous set of 35 shots of Botox for headaches. Started with 100 units, then 150 units, then 200 units.This over a period of 1 and a half years. I had pain in my neck, shoulder and injection site pain, it did help with the headaches but didn't take away completely. So the doctor give me 300 units of Botox. That was biggest mistake of my life 7 hours later my head started feeling very weird, I started having bad anxiety. I called the doctor he said it had to run its  90 days then it would get better it's been almost 2 years. It isn't any better. I'm exhausted, the weird feeling and anxiety is worse I have no life. One Doctor at the ER told me the problems I'm having are definitely caused from the Botox. Do your research before you take Botox its ruined my life!!"