Ummm... "anti-psychotics" cause bruxism. Bad idea. Really bad idea. They cause muscle stiffness which can result in jaw clenching. I don't have bruxism normally, but I do on "anti-psychotics" to the point where I can feel my teeth grinding away. That stiffness and other aspects of loss of control over movement are why they control stims -- they lessen all movement in general. But they can also cause stimming in the form of akathisia, which is a motor restlessness that is awful, in extreme forms even resulting in violence, in less extreme forms resulting in tons of pacing and fidgeting because you feel horrible if you don't.
I've heard Buspar and similar drugs get rid of it for a lot of people, though. I'd look into drugs for bruxism rather than drugs for stimming.
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"In my world it's a place of patterns and feel. In my world it's a haven for what is real. It's my world, nobody can steal it, but people like me, we live in the shadows." -Donna Williams