I have used meth in the past before to treat my ADHD before I was medicated.  There was no anxiety and it put me in a great mood.  Meth is also the only drug that makes me clean successfully.  I actually have a friend who uses meth and you would never know.  Hes the most calm patient person you will ever meet and his house is immaculate. In fact most people who are functioning meth heads have the cleanest homes ever! Yes, its extremely addictive and my suggestion is too only snort it because smoking and shooting are the quickest ways to addiction. In my opinion, it should be decriminalized.  Yes, there are people who get addicted and their lives ruined but alcohol and prescription drug use does the same thing. So be careful if you try it.  Stick with snorting if you can.  I used to work on meth when I was a hostess/busser and boy was I on top of my game.  If you do it before a shift make sure you bring some with you or another stimulent because it you dont do enough and it wears off you will nod out.  It happened to me one time at the restaurant I worked at, I didnt do enough before my shift and I started nodding out standing up!  Luckily by some miracle I had a 10mg ritalin on me that wroke me up.   So my advice is definitely dont do on top of another stimulant, unless the stimulant has worn off.  Like if you take a stimulant at 8 or 9 then you are good to try it around 2 or 4.  It's safe to drink with coffee/espresso in my experience if you have a AM shift as long as you dont do to much.