I just got some at the nutrition company and he told me the same thing lol. Make sure sure its hcl the ones I got were 2.5 mg, but he said to just start with 1 in my stack. That seems kind of low doesn't it?
You can use 5 mg. Just use 2 of them instead of one. It's very mild. I've been on this stack for a couple of weeks now.
Why don't you try taking the stack with food your first time just to see how you respond. It will buffer it a little bit.
If you take it on empty, you make be climbing the walls for a while.