I agree with Rohag. I am not very knowledgable about it but what I do know is it's an extreme treatment, not fully understood, and although it helps some people has some icky side effects as well. For that reason it is not used at first, however if you've been trying other treatments for a while it may be a good thing to look into.

consult the articles here on PC (the main website) and search around google for reputable sources of information. Also, consider talking to your therapist/psychiatrist to get more information and find out if it's right for you

wishing you the best =)