Hey AndrewD, welcome to Bluelight!
Since you are into xanax and opiates you should definately have a look at the
Other Drugs forum. We also have
Cannabis Discussion for the green enthusiasts.
Being from the United States you should fit right in over at
North & South American Social & Drug Discussion. If you are into chemistry they discuss a bit of that over in
Advanced Drug Discussion along with pharmacology and other drug related topics, discussions over there can get very in depth.
I hope you stick around and become part of the community mate, it really is a fantastic site and I guarantee you will learn heaps!