Hey Daisy,
I went on it about 7 months ago. I take 100mgs at night. At first you may feel groggy, it is powerful, but I've got to say it has helped me so greatly. That's me. Of course we all have different body/brain chemistry. I totally understand your fear. Any new medication can cause that. I was put on it because I am Bipolar. I was experiencing so much anxiety that I was prescribed the extended release as well. Things are never perfect of course, but during the day I am a lot calmer. Every med has side-effects, and I think it's valuable to look at them and question your Dr. about them. But yes, you don't need to start until you get a professional answer. Look, I'm on a few different meds, and I read about the possibilities, but I know I need them. Maybe for life. To me, I'd rather live a more peaceful existence than the more erratic one.
Good on you for reviewing the print-out. And absolutely make your own decisions. I, myself am doing just fine. But first off you have to trust your Dr. and of course yourself. And that takes questions and time.
Feel better and be well
x