@lmbrjack
The problem is that I don’t think it’s nervousness, but more adrenaline from excitement. Do beta lockers help with that as well?
I really suggest not to use any medicine or drugs… Don't know your age, but it does not solve the problem. And I guess about your writing, that this can be handled by just natural. Also using medicines never walks without risks ! Im not sure its a good way to lie to yourself. And addiction can be grow up to anything ,even with a placebo, 'cause there are not just phisical addiction, but mental addiction aswell. If you use to use drugs, to make you successfull, Im sure that 99% of people fall into some kind of mental addiction and not easily get out of it.
But what you can try, all kind of stagefright is about some kind of low self-confidence. What you have to "practice" is how to improve self-confidence. Im a professional musician aswell as magician. For me this stagefright stuff was heavy about music performances. And I realized that this was just gone, when I reached a kind of level (also in professionality) also in self-confidence, that I can imagine, that no matter of what happens, also even IF I MAKE A MISTAKE, nothing Will happen that makes the Armageddon..youknow.. This is the main thing, to realize, deeply in your mind !!!
Second, how to practice it, and in that I agree with the others, do as often as you can, but be clever, and build a stair, and walk up step by step. I mean, perform to a lower audience, or just a friend, then make the deal bigger, and more. Also a private example, I often go back to more easy pieces in music, or magic, and perform them, to get just experience. Pieces that have really no risks for me, because I know them quite well.
So its really a personal way, and also a spiritual way, how to go through this stuff. But I promise you WILL ! Just time ! And do it !

I also suggest, to get deep inside yourself, and try to find out what you afraid of, what are your fears, and work with them. It Will also improve your stage life. But be patiente !
And a useful technique, try to hold your hands hard, or do some kicks or punches in the air and then relax, after stretch as much up as you can, then fall your hands, and relax, do it some time, then make 2 or 3 deep breath, getting the air out as much as you can, and breath also as much as you can, hold it for a while, and sloooowly get out.
And if you say more adrenaline, then I suggest you more sport !!!
hope my post helped a bit, take care, and good luck
