Lithium salts or preparations are used to treat bipolar disorder and classified as mood stabilizers.
The exact mechanism of action of how lithium has a role in treating depression is not exactly known yet.
So, to easily remember the adverse events of Lithium (mnemonics):
L: Leucocytosis (increase in the total number of WBCs)
I: Increase weight
I: Increased thirst (Polydypsia)
M: Muscle weakness
for more pharmacology mnemonics please click here