Is this the same as the Lithium that would be prescribed by a psychiatric doctor? My psych NP prescribed me Lithium at one point - there are many reasons that I stopped it, including the fact it gave me uncontrollable tremors/twitches. Which is common with it. The research I did about Lithium made me feel it was rather dangerous....that's just my personal opinion. Obviously many people benefit from it though. However, either way, I'd talk to a doctor about it rather than just self prescribing.
If it's not the same, just ignore